Buick Encore: Diagnostic information and procedures

DTC B2745 (WITH C67/CJ2): Traction control switch

DIAGNOSTIC CODE INDEX

DTC B2745 (WITH C67/CJ2): Traction control switch

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B2745 02

Traction Control Switch Circuit Short to Ground

DTC B2745 71

Traction Control Switch Circuit Invalid Data

Diagnostic Fault Information

Circuit/System Description

The instrument cluster illuminates the traction/stability control indicator, the traction control off and the stability control off indicator for five seconds after the ignition is turned ON. When the electronic brake control module detects a fault it sends a serial data message to the instrument cluster commanding the traction/stability control indicator ON.

The body control module monitors the signal circuit from the traction control switch. When the traction control switch is pressed once, the body control module sends a serial data message to the electronic brake control module to disable the traction control system. The electronic brake control module will request the instrument cluster to turn the traction control off indicator ON to notify the driver of the deactivation. When the traction control switch is pressed and held for five seconds, the body control module will request the electronic brake control module to disable the electronic stability control. The electronic brake control module will request the instrument cluster to turn the stability control off indicator ON to notify the driver of the deactivation.

Conditions for Running the DTC

• Ignition ON.
• Ignition voltage is greater than 8 V.

Conditions for Setting the DTC

B2745 02

The body control module detects a short to ground on the signal circuit.

B2745 71

The body control module detects an erratic signal from the traction control switch.

Action Taken When the DTC Sets

• The electronic brake control module stores DTC.
• The electronic brake control module disables the vehicle stability for the duration of the ignition cycle.

Conditions for Clearing the DTC

• The conditions for setting the DTC are no longer present.
• The electronic brake control module clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.
2. Verify the instrument cluster Traction Control indicator turns On and Off when commanding the instrument cluster All Indicators On and Off with a scan tool.

If the indicator does not turn On and Off

Replace the P16 Instrument Cluster.

If the indicator turns On and Off

3. Verify the scan tool Traction Control Switch parameter changes between Active and Inactive while pressing and releasing the traction control switch.

If the parameter does not change

Refer to Circuit/System Testing.

If the parameter changes

4. All OK.

Circuit/System Testing

1. Ignition OFF, scan tool disconnected, and all vehicle systems OFF, disconnect the harness connector at the S48E Multifunction Switch - Center Console. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal 7 and ground.

If 10 ohms or greater

1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.

If less than 10 ohms

3. Ignition ON.
4. Verify the scan tool Body Control Module Traction Control Switch parameter is Inactive.

If not Inactive

1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the signal circuit terminal 14 and ground.

• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K9 Body Control Module.

If Inactive

5. Install a 3 A fused jumper wire between the signal circuit terminal 9 and the ground circuit terminal 7.
6. Verify the scan tool Traction Control Switch parameter is Active.

If not Active

1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.

• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V

3. Test for less than 2 ohms in the signal circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K9 Body Control Module.

If Active

7. Test or replace the S48E Multifunction Switch - Center Console.

Component Testing

1. Ignition OFF, disconnect the harness connector at the S48E Multifunction Switch - Center Console.
2. Test for infinite resistance between the signal terminal 9 and the ground terminal 7 with the switch in the open position.

If less than infinite resistance

Replace the S48E Multifunction Switch - Center Console.

If infinite resistance

3. Test for less than 2 ohms between the signal terminal 9 and the ground terminal 7 with the switch in the closed position.

If 2 ohms or greater

Replace the S48E Multifunction Switch - Center Console.

If less than 2 ohms

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Vehicle Stability Control System Switch Replacement
• Control Module References for Body Control Module, Electronic Brake Control Module or Instrument Cluster replacement, programming and setup

DTC B2745 (WITH C60/C41): Traction control switch

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B2745 02

Traction Control Switch Circuit Short to Ground

DTC B2745 71

Traction Control Switch Circuit Invalid Data

Diagnostic Fault Information

Circuit/System Description

The instrument cluster illuminates the traction/stability control indicator, the traction control off and the stability control off indicator for five seconds after the ignition is turned ON. When the electronic brake control module detects a fault it sends a serial data message to the instrument cluster commanding the traction/stability control indicator ON.

The body control module monitors the signal circuit from the traction control switch. When the traction control switch is pressed once, the body control module sends a serial data message to the electronic brake control module to disable the traction control system. The electronic brake control module will request the instrument cluster to turn the traction control off indicator ON to notify the driver of the deactivation. When the traction control switch is pressed and held for five seconds, the body control module will request the electronic brake control module to disable the electronic stability control. The electronic brake control module will request the instrument cluster to turn the stability control off indicator ON to notify the driver of the deactivation.

Conditions for Running the DTC

• Ignition ON.
• Ignition voltage is greater than 8 V.

Conditions for Setting the DTC

B2745 02

The body control module detects a short to ground on the signal circuit.

B2745 71

The body control module detects an erratic signal from the traction control switch.

Action Taken When the DTC Sets

• The electronic brake control module stores DTC.
• The electronic brake control module disables the vehicle stability for the duration of the ignition cycle.

Conditions for Clearing the DTC

• The conditions for setting the DTC are no longer present.
• The electronic brake control module clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.
2. Verify the instrument cluster Traction Control indicator turns On and Off when commanding the instrument cluster All Indicators On and Off with a scan tool.

If the indicator does not turn On and Off

Replace the P16 Instrument Cluster.

If the indicator turns On and Off

3. Verify the scan tool Traction Control Switch parameter changes between Active and Inactive while pressing and releasing the traction control switch.

If the parameter does not change

Refer to Circuit/System Testing.

If the parameter changes

4. All OK.

Circuit/System Testing

1. Ignition OFF, scan tool disconnected, and all vehicle systems OFF, disconnect the harness connector at the S75 Traction Control Switch. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal 1 and ground.

If 10 ohms or greater

1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.

If less than 10 ohms

3. Ignition ON.
4. Verify the scan tool Body Control Module Traction Control Switch parameter is Inactive.

If not Inactive

1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the signal circuit terminal 14 and ground.

• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K9 Body Control Module.

If Inactive

5. Install a 3 A fused jumper wire between the signal circuit terminal 4 and the ground circuit terminal 1.
6. Verify the scan tool Traction Control Switch parameter is Active.

If not Active

1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.

• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V

3. Test for less than 2 ohms in the signal circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K9 Body Control Module

If Active

7. Test or replace the S75 Traction Control Switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the S75 Traction Control Switch.
2. Test for infinite resistance between the signal terminal 4 and the ground terminal 1 with the switch in the open position.

If less than infinite resistance

Replace the S75 Traction Control Switch.

If infinite resistance

3. Test for less than 2 ohms between the signal terminal 4 and the ground terminal 1 with the switch in the closed position.

If 2 ohms or greater

Replace the S75 Traction Control Switch.

If less than 2 ohms

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Vehicle Stability Control System Switch Replacement
• Control Module References for Body Control Module, Electronic Brake Control Module or Instrument Cluster replacement, programming and setup

DTC C0035, C0040, C0045, OR C0050: Wheel speed sensor

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0035 06

Left Front Wheel Speed Sensor Low Voltage/Open

DTC C0035 0F

Left Front Wheel Speed Sensor Circuit Signal Erratic

DTC C0035 18

Left Front Wheel Speed Sensor Circuit Signal Low Signal Amplitude

DTC C0035 5A

Left Front Wheel Speed Sensor Not Plausible

DTC C0040 06

Right Front Wheel Speed Sensor Low Voltage/Open

DTC C0040 0F

Right Front Wheel Speed Sensor Circuit Signal Erratic

DTC C0040 18

Right Front Wheel Speed Sensor Circuit Signal Low Signal Amplitude

DTC C0040 5A

Right Front Wheel Speed Sensor Not Plausible

DTC C0045 06

Left Rear Wheel Speed Sensor Low Voltage/Open

DTC C0045 0F

Left Rear Wheel Speed Sensor Circuit Signal Erratic

DTC C0045 18

Left Rear Wheel Speed Sensor Circuit Signal Low Signal Amplitude

DTC C0045 5A

Left Rear Wheel Speed Sensor Not Plausible

DTC C0050 06

Right Rear Wheel Speed Sensor Low Voltage/Open

DTC C0050 0F

Right Rear Wheel Speed Sensor Circuit Signal Erratic

DTC C0050 18

Right Rear Wheel Speed Sensor Circuit Signal Low Signal Amplitude

DTC C0050 5A

Right Rear Wheel Speed Sensor Not Plausible

Diagnostic Fault Information

Circuit/System Description

The wheel speeds are detected by active wheel speed sensors and encoder rings. The encoder ring consists of permanent magnets. Each wheel speed sensor receives ignition voltage from the electronic brake control module and provides an alternating current square wave signal to the electronic brake control module. As the wheel spins, the electronic brake control module uses the frequency of the square wave signal to calculate the wheel speed.

Conditions for Running the DTC

C0035 06, C0040 06, C0045 06, or C0050 06

• Ignition ON.
• Ignition voltage is greater than 8 V.

C0035 0F, C0040 0F, C0045 0F, or C0050 0F

• Ignition ON.
• Ignition voltage is greater than 8 V.
• Vehicle speed is greater than 20 km/h (12 MPH).

C0035 18, C0040 18, C0045 18, or C0050 18

• Ignition ON.
• Ignition voltage is greater than 8 V.
• No other wheel speed circuit DTCs are set.
• At least two other wheel speed circuits are not 0 km/h (0 MPH).

C0035 5A, C0040 5A, C0045 5A, or C0050 5A

• Ignition ON.
• Ignition voltage is greater than 8 V.
• The vehicle speed is greater than 20 km/h (12 MPH).

Conditions for Setting the DTC

C0035 06, C0040 06, C0045 06, or C0050 06

• A short to voltage is detected on a wheel speed signal.
• A short to ground or an open/high resistance is detected on a wheel speed signal.
• A short to ground or an open/high resistance is detected on a wheel speed ignition circuit.

C0035 18, C0040 18, C0045 18, or C0050 18

• One wheel speed is less than 2 km/h (1.2 MPH).
• The remaining wheel speeds are greater than 10 km/h (6.2 MPH) for 0.154 seconds.
• The difference between the remaining wheel speeds are less than 4 km/h (2.5 MPH) from each other for more than 2 minutes.

C0035 0F, C0040 0F, C0045 0F, or C0050 0F

The electronic brake control module detected a rapid variation in the wheel speed. The wheel speed changes 20 km/h (12 MPH) or more in 0.7 seconds. The change must occur 56 times with no more than 0.7 seconds between occurrences.

C0035 5A, C0040 5A, C0045 5A, or C0050 5A

The difference between fastest and slowest wheel speed is greater than 60% for more than 2 minutes.

Action Taken When the DTC Sets

• The ABS indicator turns ON.
• The traction/stability control indicator turns ON, if equipped with electronic stability control.
• The electronic brake distribution does not function optimally with multiple wheel speed sensor DTCs set.
• The electronic brake control module disables the ABS, the traction control and the stability control for the duration of the ignition cycle.

Conditions for Clearing the DTC

• The condition for setting the DTC is no longer present.
• The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Diagnostic Aids

• Do not use a magnet to clean the encoder ring.
• Inspect the wheel hub bearing encoder ring for rust or corrosion.
• Inspect the wheel speed sensor for contamination, physical damage, and correct installation.
• If two or more wheel speed sensors are inoperative, diagnose each wheel speed sensor individually.
• If any of the symptom codes 0F, 18 or 5A are set, refer to the Diagnostic Fault Information table for possible mechanical faults or conditions.
• If the customer comments that the ABS indicator is ON only during moist environmental conditions (rain, snow, vehicle wash, etc.), inspect the wheel speed sensor wiring for signs of water intrusion.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Test drive the vehicle in a straight line at a speed greater than 40 km/h (25 MPH).
2. Verify all scan tool Wheel Speed Sensor parameters are within 4 km/h (2.5 MPH) of each other.

If any parameter is not within 4 km/h (2.5 MPH) of each other

Refer to Circuit/System Testing.

If each parameter is within 4 km/h (2.5 MPH) of each other

3. All OK.

Circuit/System Testing

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connectors at the appropriate B5 Wheel Speed Sensor and the harness connector at the K17 Electronic Brake Control Module, ignition ON.
2. Test for less than 1 V between the appropriate K17 Electronic Brake Control Module harness connector terminals listed below and ground:

• B5LF Wheel Speed Sensor - Left Front - terminal 34 and terminal 21
• B5LR Wheel Speed Sensor - Left Rear - terminal 33 and terminal 20
• B5RF Wheel Speed Sensor - Right Front - terminal 18 and terminal 31
• B5RR Wheel Speed Sensor - Right Rear - terminal 19 and terminal 32

If 1 V or greater

Repair the short to voltage on the circuit.

If less than 1 V

3. Ignition OFF.
4. Test for infinite resistance between the K17 Electronic Brake Control Module harness connector terminals listed below and ground:

• B5LF Wheel Speed Sensor - Left Front - terminal 34 and terminal 21
• B5LR Wheel Speed Sensor - Left Rear - terminal 33 and terminal 20
• B5RF Wheel Speed Sensor - Right Front - terminal 18 and terminal 31
• B5RR Wheel Speed Sensor - Right Rear - terminal 19 and terminal 32

If less than infinite resistance

Repair the short to ground on the circuit.

If infinite resistance

5. Test for less than 2 ohms between the B5 Wheel Speed Sensor harness connector terminal 1 and the K17 Electronic Brake Control Module harness connector terminal listed below:

• B5LF Wheel Speed Sensor - Left Front - terminal 34
• B5LR Wheel Speed Sensor - Left Rear - terminal 33
• B5RF Wheel Speed Sensor - Right Front - terminal 18
• B5RR Wheel Speed Sensor - Right Rear - terminal 19

If 2 ohms or greater

Repair the open/high resistance in the circuit.

If less than 2 ohms

6. Test for less than 2 ohms between the B5 Wheel Speed Sensor harness connector terminal 2 and the K17 Electronic Brake Control Module harness connector terminal listed below:

• B5LF Wheel Speed Sensor - Left Front - terminal 21
• B5LR Wheel Speed Sensor - Left Rear - terminal 20
• B5RF Wheel Speed Sensor - Right Front - terminal 31
• B5RR Wheel Speed Sensor - Right Rear - terminal 32

If 2 ohms or greater

Repair the open/high resistance in the circuit.

If less than 2 ohms

7. Replace the B5 Wheel Speed Sensor.
8. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

9. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Front Wheel Speed Sensor Replacement
• Rear Wheel Speed Sensor Replacement
• Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C0110: Pump motor

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0110 04

Pump Motor Circuit Open

DTC C0110 06

Pump Motor Circuit Low Voltage/Open

DTC C0110 61

Pump Motor Stuck

Diagnostic Fault Information

Circuit/System Description

The pump motor is an integral part of the brake pressure modulator, while the pump motor relay is integral to the electronic brake control module. The pump motor relay is not engaged during normal system operation.

When ABS operation is required the electronic brake control module activates the pump motor relay and battery voltage is provided to the pump motor.

Conditions for Running the DTC

C0110 04 or C0110 06

Ignition ON.

C0110 61

• The vehicle speed is greater than 20 km/h (13 MPH), and brake is not applied.
• The test is initiated once per ignition cycle, when the vehicle speed is greater than 15 km/h (9 MPH), and a fault was set on the last ignition cycle.

Conditions for Setting the DTC

C0110 04 or C0110 06

• The ground circuit is open, and the feedback voltage is greater than 5 V for 0.5 seconds, the pump is not activated.
• The electronic brake control module detects a low voltage in the pump motor supply circuit when the feedback voltage is less than 5 V for greater than 500 ms, and the pump motor is not activated.

C0110 61

The pump motor continues to rotate briefly after deactivation creating a feedback voltage. The electronic brake control module sets the DTC if the measured feedback voltage indicates a binding or stalled pump motor.

Action Taken When the DTC Sets

• The ABS indicator turns ON.
• The traction/stability control indicator turns ON, if equipped with electronic stability control.
• The electronic brake control module disables the ABS, the traction control and the electronic stability control for the duration of the ignition cycle.

Conditions for Clearing the DTC

• The condition for setting the DTC is no longer present.
• The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON
2. Verify the ABS pump motor turns ON and OFF when commanding the ABS Pump Motor ON and OFF with a scan tool

If the pump motor does not turn ON and OFF

Refer to Circuit/System Testing

If the pump motor turns ON and OFF

3. All OK.

Circuit/System Testing

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the K17 Electronic Brake Control Module. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminals listed below and ground:

• Terminal 13
• Terminal 38

If 10 ohms or greater

1. Ignition OFF
2. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.

If less than 10 ohms

3. Ignition ON.
4. Verify a test lamp illuminates between the B+ circuit terminal 1 and ground.

If the test lamp does not illuminate and the circuit fuse is good

1. Ignition OFF.
2. Test for less than 2 ohms in the B+ circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse.

If the test lamp does not illuminate and the circuit fuse is open

1. Ignition OFF.
2. Test for infinite resistance between the B+ circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the Q5 Brake Pressure Modulator.

If the test lamp illuminates

5. Replace the Q5 Brake Pressure Modulator.
6. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

7. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Brake Pressure Modulator Valve Replacement
• Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C0131: Traction control system pressure circuit

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0131 00

Traction Control System Pressure Circuit Malfunction

DTC C0131 5A

Traction Control System Pressure Circuit Not Plausible

Circuit/System Description

The electronic brake control module monitors the brake pressure sensor which is integral to the brake pressure modulator. The body control module monitors the brake pedal position sensor signal when the brake pedal is applied and sends a serial data message to the electronic brake control module indicating the brake pedal position. The electronic brake control module compares the brake pressure to the brake pedal position and uses this information for vehicle stability control.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

C0131 00

The electronic brake control module detects the brake pressure is out of specified range.

C0131 5A

The electronic brake control module does not detect that the master cylinder pressure changed after driving the vehicle at a speed greater than 40 km/h (25 MPH) and performing three brake stops.

Action Taken When the DTC Sets

• The traction/stability control indicator turns ON.
• The electronic brake control module disables the traction/stability or the duration of the ignition cycle, and the ABS remains functional.

Conditions for Clearing the DTC

• The condition for setting the DTC is no longer present.
• The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Diagnostic Aids

Diagnose all other stop lamp DTCs or Symptoms prior to performing this diagnostic procedure.

Reference Information

Schematic Reference

• Antilock Brake System Schematics(Encore), Antilock Brake System Schematics (Encore)
• Exterior Lights Schematics(Encore) , Exterior Lights Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.
2. Verify the stop lamps turn ON and OFF while applying and releasing the brake pedal.

If the stop lamps do not turn ON and OFF

Refer to Symptoms - Lighting .

If the stop lamps turn ON and OFF

3. Verify the Brake Pedal Position Sensor or the brake pedal are not binding causing residual brake pressure to be detected, while the brake lights operate properly.

If a condition is found

Repair or replace the appropriate component.

If a condition is not found

4. Verify the scan tool Brake Pressure Sensor parameter changes from 0 V to 1 V when the brake pedal is applied.

If the Brake Pressure Sensor parameter does not change

1. Replace the Q5 Brake Pressure Modulator.
2. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

• If the DTC sets, replace the K17 Electronic Brake Control Module.
• If the DTC does not set.

3. All OK.

If the Brake Pressure Sensor parameter changes

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Brake Pressure Modulator Valve Replacement
• Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C0161: Antilock brake system brake switch

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0161 5A

Antilock Brake System Brake Switch Not Plausible

DTC C0161 71

Antilock Brake System Brake Switch Invalid Data

Circuit/System Description

When the brake pedal is applied, the body control module sends a serial data message to the electronic brake control module in reference to the brake pedal positions. The electronic brake control module compares the correlation between the brake pedal position and the amount of brake pressure it senses from the brake pressure sensor, which is internal to the brake pressure modulator. It uses this information to control the vehicle during an stability control event.

Conditions for Running the DTC

• Ignition ON.
• Ignition voltage is greater than 8 V.

Conditions for Setting the DTC

• The electronic brake control module detects the brake pedal is not applied when the brake pressure is greater 15 bar (218 PSI) for 3 seconds.
• The electronic brake control module does not detect that the stop lamp switch signal changed after driving the vehicle at a speed greater than 40 km/h (25 MPH) and performing three brake stops.

Action Taken When the DTC Sets

• The traction/stability control indicator off turns ON, if equipped with electronic stability control.
• The electronic brake control module disables the traction/stability for the duration of the ignition cycle, and the ABS remains functional.

Conditions for Clearing the DTC

• The condition for setting the DTC is no longer present.
• The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Diagnostic Aids

• DTC C0161 may set if the brake pedal is applied while accelerating.
• Diagnose all other stop lamp DTCs or Symptoms prior to performing this diagnostic procedure.

Reference Information

Schematic Reference

Antilock Brake System Schematics(Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.
2. Verify the stop lamps turn ON and OFF while applying and releasing the brake pedal.

If the stop lamps do not turn ON and OFF

Refer to Symptoms - Lighting .

If the stop lamps turn ON and OFF

3. Verify the Brake Pedal Position Sensor or the brake pedal are not binding causing residual brake pressure to be detected, while the brake lights operate properly.

If a condition is found

Repair or replace the appropriate component.

If a condition is not found

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

DTC C0186, C0196, OR C0287: Lateral acceleration sensor/yaw rate sensor/lateral acceleration sensor

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0186

Lateral Acceleration Sensor Signal

DTC C0196

Yaw Rate Signal

DTC C0287

Longitudinal Acceleration Sensor Signal

For symptom byte information refer to Symptom Byte List .

Circuit/System Description

The yaw rate, lateral acceleration and longitudinal acceleration sensors are combined into one multi-axis acceleration sensor, internal to the inflatable restraint sensing and diagnostic module. The multi-axis acceleration sensor communicates with the electronic brake control module via serial data. The electronic brake control module activates the stability control function depending on the multi-axis acceleration sensor input.

The inflatable restraint sensing and diagnostic module uses the multi-axis acceleration sensor to determine if the vehicle is in a roll over or near collision incident.

Conditions for Running the DTC

C0186 00, C0196 00, or C0287 00

Ignition ON

C0186 5A, or C0287 5A

Drive the vehicle straight ahead with constant velocity greater than 30 km/h (18.6 MPH), then turn right and then turn left.

C0196 5A

Vehicle at standstill for 10 s, then drive the vehicle straight ahead with constant velocity greater than 20 km/h (12.4 MPH).

Conditions for Setting the DTC

C0186 00

• An internal fault in multi-axis acceleration sensor will set this DTC.
• Improperly mounted or loose inflatable restraint sensing and diagnostic module may set this DTC.

C0186 5A

• An internal fault in multi-axis acceleration sensor.
• Improperly mounted or loose inflatable restraint sensing and diagnostic module.
• The lateral acceleration signal is not plausible with the lateral acceleration signal, the steering wheel angle sensor signal and the vehicle speed.

C0196 00

The yaw rate signal is out of the specified range.

C0196 09

The yaw rate signal is changing faster than physically possible.

C0196 5A

• Improperly mounted or loose inflatable restraint sensing and diagnostic module may set this DTC.
• The yaw rate signal is not plausible with the lateral acceleration signal, the steering wheel angle sensor signal and the vehicle speed.

C0287 00

The longitudinal acceleration signal is out of the specified range.

C0287 5A

• An internal fault in multi-axis acceleration sensor will set this DTC.
• The longitudinal acceleration signal is not plausible with the vehicle acceleration.

Action Taken When the DTC Sets

• The air bag indicator turns ON.
• The traction/stability control indicator turns ON.
• The electric brake control module disables the electronic stability control and the hill start assist for the duration of the ignition cycle.

Conditions for Clearing the DTC

• A current DTC clears when the diagnostic runs and passes.
• The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics(Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Verify the K36 Inflatable Restraint Sensing and Diagnostic Module is installed correctly.

If loose or incorrect installation

Correct the installation or replace the component

If correct installation

2. Verify DTC C0186, C0196, or C0287 is not set in the K36 Inflatable Restraint Sensing and Diagnostic Module

If any of the DTCs are set

Perform the Vehicle Yaw Sensor Learn.

If none of the DTCs are set

3. Verify DTC C0186, C0196, or C0287 is not set in the K17 Electronic Brake Control Module.

If any of the DTCs are set

1. Replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
2. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

• If the DTC sets, replace the K17 Electronic Brake Control Module.
• If the DTC does not set

3. All OK.

If none of the DTCs are set

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Inflatable Restraint Sensing and Diagnostic Module replacement, programming and setup

DTC C0201: Antilock braking system enable relay primary ircuit

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0201 00

Antilock Braking System Enable Relay Primary Circuit

Circuit/System Description

Battery positive voltage is supplied to the electronic brake control module at all times through a 40 A fuse located in the underhood fuse block. The electronic brake control module uses this voltage to power the pump motor. The pump motor is an integral part of the brake pressure modulator, while the pump motor relay is integral to the electronic brake control module. The pump motor relay is not engaged during normal system operation. When the ABS, traction/stability operation is required the electronic brake control module activates the pump motor relay and turns the pump motor ON.

Conditions for Running the DTC

• Ignition ON.
• Ignition voltage is greater than 8 V.

Conditions for Setting the DTC

The pump motor supply voltage is less than 4 V.

Action Taken When the DTC Sets

• The ABS indicator turns ON.
• The traction/stability control indicator turns ON, if equipped with electronic stability control.
• The electronic brake control module disables the ABS, the traction control and the stability control for the duration of the ignition cycle.

Conditions for Clearing the DTC

• The condition for setting the DTC is no longer present.
• The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics(Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Ignition OFF all vehicle systems OFF, disconnect the harness connector at the K17 Electronic Brake Control Module. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between each ground circuit terminal listed below and ground:

Terminal 13

Terminal 38

If 10 ohms or greater

1. Ignition OFF
2. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.

If less than 10 ohms

3. Ignition ON.
4. Verify a test lamp illuminates between the B+ circuit terminal 1 and ground.

If the test lamp does not illuminate and the circuit fuse is good

1. Ignition OFF.
2. Test for less than 2 ohms in the B+ circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse.

If the test lamp does not illuminate and the circuit fuse is open

1. Ignition OFF.
2. Test for infinite resistance between the B+ circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the Q5 Brake Pressure Modulator.

If the test lamp illuminates

5. Replace the Q5 Brake Pressure Modulator.
6. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

7. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Brake Pressure Modulator Valve Replacement
• Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C0242 OR P0856: Traction control malfunction/traction control orque request signal

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0242 00

Engine Control Module Indicated Traction Control Malfunction

DTC P0856

Traction Control Torque Request Signal Message Counter Incorrect

Circuit/System Description

When traction control is active, the electronic brake control module sends a serial data message to the engine control module requesting torque reduction. When certain engine control module DTCs are set, the engine control module will not be able to perform the torque reduction for traction control. A serial data message is sent to the electronic brake control module indicating that traction control is not allowed.

Conditions for Running the DTC

Engine running

Conditions for Setting the DTC

The engine control module detects a fault that prevents it from performing a traction control function and sends a serial data message to the electronic brake control module indicating that torque reduction is not allowed.

Action Taken When the DTC Sets

• The traction/stability control indicator turns ON.
• The electronic brake control module disables the traction control and the stability control for the duration of the ignition cycle.

Conditions for Clearing the DTC

• The DTC clears when the diagnostic runs and passes.
• The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics(Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.
2. Verify that no other DTCs are set except for C0242 or P0856.

If any other DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

If no other DTCs are set

3. Replace the K20 Engine Control Module.
4. Verify that DTC C0242 or P0856 does not set while operating the vehicle within the Conditions for Running the DTC.

If DTC C0242 or P0856 is set

Replace the K17 Electronic Brake Control Module.

If DTC C0242 or P0856 is not set

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Engine Control Module replacement, programming and setup

DTC C0277: Brake pedal position sensor circuit calibration not learned

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0277 4B

Brake Pedal Position Sensor Circuit Calibration Not Learned

Circuit/System Description

When the brake pedal is applied, the body control module sends a serial data message to the electronic brake control module in reference to the brake pedal positions. The electronic brake control module compares the correlation between the brake pedal position and the amount of brake pressure it senses from the brake pressure sensor, which is internal to the brake pressure modulator. It uses this information to control the vehicle during an stability control event

Conditions for Running the DTC

• Brakes Applied.
• Battery voltage must be between 9-16 V.

Conditions for Setting the DTC

• The body control module sends invalid brake pedal position data to the electronic brake control module.
• The DTC may set in the body control module and/or electronic brake control module, when the brake pedal position sensor home position is not learned.

Actions Taken When the DTC Sets

• The ABS indicator is commanded ON.
• The red brake indicator is commanded ON.
• The stop lamps may not activate at the expected brake pedal positions.
• The traction/stability control indicator turns ON, if equipped with electronic stability control.

Conditions for Clearing the DTC

• The condition responsible for setting the DTC no longer exists.
• A DTC will not clear the current status until the next ignition cycle.
• A successful brake pedal position sensor calibration has been performed.
• A history DTC will clear once 40 malfunction-free ignition cycles have occurred

Reference Information

Schematic Reference

• Antilock Brake System Schematics(Encore), Antilock Brake System Schematics (Encore)
• Exterior Lights Schematics (Encore) , Exterior Lights Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

• ABS Description and Operation
• Exterior Lighting Systems Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Verify DTC C0277 is not set in the K9 Body Control Module

If DTC is set

Refer to DTC C0277 or C0890 .

If DTC is not set

2. Ignition ON
3. Verify the scan tool Body Control Module Brake Pedal Position Sensor Learned Released Position is YES.

If the released position is not YES

Perform the Brake Pedal Position Sensor Learn. Refer to Brake Pedal Position Sensor Calibration .

If the released position is YES

4. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C027C: Front brake discs high temperature

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C027C

Front Brake Discs High Temperature

For symptom byte information refer to Symptom Byte List .

Circuit/System Description

The electronic brake control module monitors how often the traction control or the stability control system activates in order to calculate an estimate of the front brake discs temperature. In most cases the high temperatures are caused by extended traction control activation. If the electronic brake control module calculates that the front brake components temperatures are too high, the electronic brake control module will temporarily suspend the traction control system function until the front brake discs cool down.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The electronic brake control module detects the calculated temperature of the brake components is higher than 500ºC (932ºF).

Action Taken When the DTC Sets

• The traction/stability control indicator turns ON.
• The electronic brake control module disables the traction control and stability control for the duration of the ignition cycle.

Conditions for Clearing the DTC

• The condition for setting the DTC is no longer present.
• The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Diagnostic Aids

DTC C027C does not indicate a malfunction has occurred. This DTC indicates there was excessive traction control or stability control activation that caused the high temperatures.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

NOTE: Since most occurrences of this DTC are caused by excessive brake usage, review with the customer the conditions under which the DTC set.

1. Allow the brakes to cool down before performing test.
2. Verify that no other DTCs are set.

If any other DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

If no other DTCs are set

3. Verify DTC C027C does not set while driving the vehicle under normal braking conditions. Refer to Brake System Vehicle Road Test

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for electronic brake control module replacement, programming, and setup

DTC C0292: Multi-axis acceleration sensor module circuit performance - bias level out of range

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0292 1A

Multi-Axis Acceleration Sensor Module Circuit Performance - Bias Level Out of Range

Diagnostic Fault Information

Circuit/System Description

The Lateral Acceleration sensor, the Longinitudinal Acceleration Sensor and the Yaw Rate Sensors are combined into one sensor called the Multi-axis Acceleration Sensor, which is internal to the inflatable restraint sensing and diagnostic module. The Multi-axis Acceleration Sensor communicates with the Electronic Brake Control Module via serial data. The module activates the stability control function depending on Multi-axis Acceleration Sensor input.

Conditions for Running the DTC

• Ignition ON.
• Ignition voltage is greater than 8 V.

Conditions for Setting the DTC

A short to ground or an open/high resistance is detected on the ignition circuit.

Action Taken When the DTC Sets

• The air bag indicator turns ON
• The traction/stability control indicator turns ON
• A message may be displayed on the driver information center.
• The electric brake control module disables the electronic stability control and the hill start assist for the duration of the ignition cycle.

Conditions for Clearing the DTC

• The condition for setting the DTC is no longer present.
• The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

• Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)
• SIR Schematics (Encore) , SIR Schematics (Encore)

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Ignition OFF, scan tool disconnected, and all vehicle systems OFF, disconnect the X1 and X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 25 ohms between the ground circuit terminal 19 and ground.

If 25 ohms or greater

1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.

If less than 25 ohms

3. Ignition ON.
4. Verify that a test lamp illuminates between the ignition circuit terminal 17 and ground.

If the test lamp does not illuminate and the circuit fuse is good

1. Ignition OFF, remove the test lamp.
2. Test for less than 2 ohms in the ignition circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, verify the fuse is OK and there is voltage at the fuse.

If the test lamp does not illuminate and the circuit fuse is open

1. Ignition OFF, remove the test lamp.
2. Test for infinite resistance between the ignition circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

If the test lamp illuminates

5. Replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Inflatable Restraint Sensing and Diagnostic Module replacement, programming and setup

DTC C0551: Multi-axis acceleration sensor module circuit erformance - bias level out of rangee

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0551 3A

Option Configuration Incorrect Component Installed

Circuit/System Description

The Vehicle Identification Number (VIN) and option content is programmed into the electronic brake control module during initial programming of the module.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

The electronic brake control module is not properly programmed or configured.

Action Taken When the DTC Sets

• The ABS indicator turns ON.
• The electronic brake control module disables the ABS for the duration of the ignition cycle.

Conditions for Clearing the DTC

• A current DTC clears when the diagnostic runs and passes.
• The electronic brake control module will turn OFF the indicators and enable the system functions in the next ignition cycle.

Diagnostic Aids

A newly replaced electronic brake control module can set one or more DTCs on its initial ignition ON cycle.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Verify that DTC C0551 is not set.

If the DTC is set

Reprogram the K17 Electronic Brake Control Module.

If the DTC is not set

2. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module replacement, and programming and setup

DTC C0561: System disabled information

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0561 77

System Disabled Information Stored Engine Speed Invalid Data

DTC C0561 78

System Disabled Information Stored Acceleration Pedal Invalid Data

DTC C0561 79

System Disabled Information Stored Transmission Gear Invalid Data

Circuit/System Description

The electronic brake control module disables the electronic stability control when other electronic control modules set DTCs for components that effect the operation of the traction control system.

Conditions for Running the DTC

Engine running.

Conditions for Setting the DTC

The electronic brake control module receives an invalid serial data message from another module more than ten times.

Action Taken When the DTC Sets

• The ABS indicator turns ON.
• The traction/stability control indicator turns ON.
• The electronic brake control module disables the ABS, the traction control, and the electronic stability control for the duration of the ignition cycle.

Conditions for Clearing the DTC

• The condition for the DTC is no longer present.
• The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Diagnostic Aids

This DTC indicates there are no problems in the antilock brake system. The body control module, the engine control module, and the transmission control module should be checked for a possible fault first.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

C0561 77 or C0561 78

1. Ignition ON.
2. Verify that no other DTCs are set.

If any other DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

If no other DTCs are set

3. Replace the K20 Engine Control Module.
4. Verify the DTC does not set while operating the vehicle under the Conditions for Running the DTC.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

5. All OK.

C0561 79

1. Ignition ON.
2. Verify that no other DTCs are set.

If any other DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

If no other DTCs are set

3. Replace the K71 Transmission Control Module.
4. Verify the DTC does not set while operating the vehicle under the Conditions for Running the DTC.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Control Module replacement, programming and setup.

DTC C0710: Steering position signal calibration

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category

DTC Descriptors

DTC C0710 4B

Steering Position Signal Calibration Not Learned

DTC C0710 5A

Steering Position Signal Not Plausible

DTC C0710 71

Steering Position Signal Invalid Data

Diagnostic Fault Information

Circuit/System Description

The steering wheel angle sensor receives a 12 V reference from the electronic brake control module. The electronic brake control module receives serial data message inputs from the steering wheel angle sensor identifying the position and direction of the steering wheel rotation. The module utilizes this signal to calculate the driver intended driving direction.

Conditions for Running the DTC

The condition for running the DTC will not occur until the initialization phase has been completed. The initialization of the electronic brake control module occurs when the following conditions have been met:

• Ignition voltage is greater than 8 V.
• The initialization happens once each ignition cycle when the vehicle speed is greater than 20 km/h (12 MPH) and the vehicle is driven in a straight line without the brake pedal being applied.

Conditions for Setting the DTC

C0710 4B

The steering wheel angle sensor is not calibrated after installation.

C0710 5A

• The steering wheel angle sensor is out of the specified range.
• The steering wheel angle sensor offset is out of the specified range.

C0710 71

The steering wheel angle signal is not plausible with the yaw rate signal and lateral acceleration signal.

Action Taken When the DTC Sets

• The ABS remains functional.
• The electronic brake control module disables the stability control for the duration of the ignition cycle.

Conditions for Clearing the DTC

• The condition for setting the DTC is no longer present.
• The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Diagnostic Aids

• Improperly mounted or loose steering wheel angle sensor.
• Inspect the vehicle for proper alignment. The car should not pull in either direction while driving straight on a level surface.
• Confirm that all tires are of the proper size and that all are matching brands. Check and adjust all tires to the stated cold air pressure as identified on the tire placard. If a mis-sized or non-matching brand tire is present, inform the customer that in order for the vehicle stability enhanced system to function normally, tires need to be a uniform size and rolling diameter.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.
2. Verify the scan tool Steering Wheel Angle parameter corresponds to the actual steering wheel position as the steering wheel is turned through its entire range of motion.

If the parameter does not correspond with the steering wheel position or the reading is erratic

Refer to Circuit/System Testing.

If the parameter reading corresponds with the steering wheel position

3. All OK.

Circuit/System Testing

1. Ignition OFF all vehicle systems OFF, disconnect the harness connector at the B99 Steering Wheel Angle Sensor. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal 6 and ground.

If 10 ohms or greater

1. Ignition OFF
2. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.

If less than 10 ohms

3. Ignition ON.
4. Verify that a test lamp illuminates between the 12 V reference circuit terminal 5 and ground.

If the test lamp does not illuminate

1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module
2. Test for infinite resistance between the 12 V reference circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance

3. Test for less than 2 ohms in the 12 V reference circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K17 Electronic Brake Control Module.

If the test lamp illuminates

5. Replace the B99 Steering Wheel Angle Sensor.
6. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

7. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Steering Angle Sensor Replacement
• Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C1207, C1208, C1221, C1222, C1225, C1226, C1232, OR C1233: Front wheel speed sensor

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C1207 00

Left Front Wheel Speed Sensor Circuit High Input

DTC C1208 00

Right Front Wheel Speed Sensor Circuit High Input

DTC C1221 00

Left Front Wheel Speed Sensor Circuit

DTC C1222 00

Right Front Wheel Speed Sensor Circuit

DTC C1225 00

Left Front Wheel Speed Sensor Circuit Performance

DTC C1226 00

Right Front Wheel Speed Sensor Circuit Performance

DTC C1232 00

Left Front Wheel Speed Sensor Circuit Low Input

DTC C1233 00

Right Front Wheel Speed Sensor Circuit Low Input

Circuit/System Description

Each wheel speed sensor receives ignition voltage through the signal high circuit from the electronic brake control module. Wheel speeds are detected by active wheel speed sensors and encoder rings. The magnetic encoder rings consists of multiple north and south pole pairs surrounding the outer circumference. When the encoder ring rotates and passes by the wheel speed sensor; it generates a sign wave in the wheel speed sensor.

The sensor converts the signal to a digital square wave; the square wave values switch between 7mA (Low) and 14mA (High) DC current. As the wheel spins, the module uses the frequency of the square wave signal to calculate the wheel speeds.

Conditions for Running the DTC

Vehicle speed is greater than 12.9 km/h (8 MPH).

Conditions for Setting the DTC

A supervised periodic message indicates the wheel speed serial data has not been received.

Action Taken When the DTC Sets

• The traction/stability control indicator turns ON.
• The electric brake control module disables the traction control, the stability control and the hill start assist for the duration of the ignition cycle.

Conditions for Clearing the DTC

• The DTC clears when the diagnostic runs and passes.
• The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Verify DTC C0035, C0040, C0045, or C0050 is not set.

If any of the DTCs are set

Refer to DTC C0035, C0040, C0045, or C0050.

If none of the DTCs are set

2. Replace the K17 Electronic Brake Control Module.
3. Verify DTC C1207, C1208, C1221, C1222, C1225, C1226, C1232, or C1233 does not set while operating the vehicle within the Conditions for Running the DTC.

If any of the DTCs are set

Replace the module that set the DTC.

If none of the DTCs are set

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or module replacement, programming and setup

DTC C124F OR C1250-C1254: Lateral acceleration sensor/longitudinal acceleration sensor

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C124F

Lateral Acceleration Sensor Circuit Low Voltage

DTC C1250

Lateral Acceleration Sensor Circuit High Voltage

DTC C1251

Lateral Acceleration Sensor Performance

DTC C1252

Longitudinal Acceleration Sensor Circuit Low Voltage

DTC C1253

Longitudinal Acceleration Sensor Circuit High Voltage

DTC C1254

Longitudinal Acceleration Sensor Performance

For symptom byte information refer to Symptom Byte List .

Circuit/System Description

The yaw rate, lateral acceleration and longitudinal acceleration sensors are combined into one multi-axis acceleration sensor, internal to the inflatable restraint sensing and diagnostic module. The multi-axis acceleration sensor communicates with the electronic brake control module and trans control module via serial data. The electronic brake control module activates the stability control function depending on the multi-axis acceleration sensor input. The inflatable restraint sensing and diagnostic module uses the multi-axis acceleration sensor to determine if the vehicle is in a roll over or near collision incident. The transmission control module sets these DTCs.

Conditions for Running the DTC

Vehicle speed is greater than 16 km/h (10 MPH).

Conditions for Setting the DTC

The transmission control module detects a fault that prevents it from performing a hill hold start assist function

Action Taken When the DTC Sets

• The air bag indicator turns ON.
• The traction/stability control indicator turns ON.
• The electronic brake control module disables the stability control and the hill hold start assist for the duration of the ignition cycle.

Conditions for Clearing the DTC

• The DTC clears when the diagnostic runs and passes.
• The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.
2. Verify that no other DTCs are set.

If any other DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

If no other DTCs are set

3. Replace the K71 Transmission Control Module.
4. Verify that the DTC does not set while operating the vehicle within the Conditions for Running the DTC

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Transmission Control Module replacement, programming, and setup

DTC C1589: Multi-axis acceleration sensor/steering wheel angle sensor supply voltage circuit performance - bias level out of range

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C1589 1A

Multi-axis Acceleration Sensor/Steering Wheel Angle Sensor Supply Voltage Circuit Performance - Bias Level Out of Range

Diagnostic Fault Information

Circuit/System Description

The lateral accelerometer, and the yaw rate sensors are combined into one sensor called the multi-axis acceleration sensor, which is internal to the inflatable restraint sensing and diagnostic module. The electronic brake control module supplies ignition voltage to the steering wheel angle sensor. The steering wheel angle sensor communicates with the electronic brake control module via serial data. The module activates the stability control function depending on multi-axis acceleration sensor and steering wheel angle sensor input.

Conditions for Running the DTC

• Ignition ON.
• The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

The electronic brake control module has detected a short to ground or open on the steering wheel angle sensor ignition circuit.

Action Taken When the DTC Sets

• The ABS indicator turns ON.
• The red brake indicator turns ON.
• The traction/stability control indicator turns ON.
• A message may be displayed on the driver information center.
• The electronic brake control module disables the ABS, the traction control system and the electronic stability control for the duration of the drive cycle.

Conditions for Clearing the DTC

• The condition for setting the DTC is no longer present.
• The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Testing

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the B99 Steering Wheel Angle Sensor. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal 6 and ground.

If 10 ohms or greater

1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.

If less than 10 ohms

3. Ignition ON.
4. Verify a test lamp illuminates between the ignition circuit terminal 5 and ground.

If the test lamp does not illuminate

1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module.
2. Test for infinite resistance between the ignition circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance

3. Test for less than 2 ohms in the ignition circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K17 Electronic Brake Control Module.

If the test lamp illuminates

5. Replace the B99 Steering Wheel Angle Sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Steering Angle Sensor Replacement
• Control Module References for electronic brake control module replacement, programming and setup

Symptoms - antilock brake system

NOTE: The following steps must be completed before using the symptom tables.

1. Perform the Diagnostic System Check - Vehicle before using the symptom tables in order to verify that all of the following are true:

• There are no DTCs set
• The control modules can communicate via the serial data link

2. Review the system operation in order to familiarize yourself with the system functions. Refer to ABS Description and Operation

Visual/Physical Inspection

• Inspect for aftermarket devices which may affect the operation of the ABS. Refer to Checking Aftermarket Accessories
• Inspect the easily accessible or visible system components for obvious damage or conditions which may cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

• ABS Indicator Malfunction
• Brake Warning Indicator Malfunction (Without J41) , Brake Warning Indicator Malfunction (With J41)
• Traction Control/Stability Control Indicator Malfunction (With C67/CJ2), Traction Control/Stability Control Indicator Malfunction (With C60/C41)

ABS INDICATOR MALFUNCTION

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Circuit/System Description

The instrument cluster turns the ABS indicator on for five seconds after the ignition is turned on, or when the electronic brake control module detects a fault it sends a serial data message to the instrument cluster commanding the indicator on.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.
2. Verify that no DTCs are set.

If any DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

If no DTCs are set

3. Verify that the Instrument Cluster ABS indicator turns On and Off when commanding the All Indicators On and Off with a scan tool.

If the ABS indicator does not turn On and Off

Replace the P16 Instrument Cluster.

If the ABS indicator turns On and Off

4. Verify the ABS indicator turns Off 5 seconds after ignition On.

If the ABS indicator does not turn Off

Replace the K17 Electronic Brake Control Module.

If the ABS indicator turns OFF

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Instrument Cluster replacement, programming and setup.

Traction control/stability control indicator malfunction (WITH C67/CJ2)

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

The instrument cluster illuminates the traction/stability control indicator, the traction control off and the stability control off indicator for five seconds after the ignition is turned ON. When the electronic brake control module detects a fault it sends a serial data message to the instrument cluster commanding the traction/stability control indicator ON.

The body control module monitors the signal circuit from the traction control switch. When the traction control switch is pressed once, the body control module sends a serial data message to the electronic brake control module to disable the traction control system. The electronic brake control module will request the instrument cluster to turn the traction control off indicator ON to notify the driver of the deactivation. When the traction control switch is pressed and held for five seconds, the body control module will request the electronic brake control module to disable the traction control and the electronic stability control. The electronic brake control module will request the instrument cluster to turn the traction control off indicator and the stability control off indicator ON to notify the driver of the deactivation.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON
2. Verify the instrument cluster indicators listed below turn On and Off when commanding the All Indicators On and Off with a scan tool.

• Stability control off indicator
• Traction control off indicator
• Traction/stability control indicator

If any indicator does not turn On and Off

Replace the P16 Instrument Cluster.

If all indicators turns On and Off

3. Verify the scan tool Body Control Module Traction Control Switch parameter changes between Active and Inactive while pressing and releasing the traction control switch.

If the parameter does not change

Refer to Circuit/System Testing.

If the parameter changes

4. All OK.

Circuit/System Testing

1. Ignition OFF, scan tool disconnected, and all vehicle systems OFF, disconnect the harness connector at the S48E Multifunction Switch - Center Console. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal 7 and ground.

If 10 ohms or greater

1. Ignition OFF
2. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.

If less than 10 ohms

3. Ignition ON.
4. Verify the scan tool Traction Control Switch parameter is Inactive.

If not Inactive

1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the signal circuit terminal 14 and ground.

• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K9 Body Control Module.

If Inactive

5. Install a 3 A fused jumper wire between the signal circuit terminal 9 and the ground circuit terminal 7.
6. Verify the scan tool Traction Control Switch parameter is Active.

If not Active

1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.

• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V

3. Test for less than 2 ohms in the signal circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K9 Body Control Module.

If Active

7. Test or replace the S48E Multifunction Switch - Center Console.

Component Testing

1. Ignition OFF, disconnect the harness connector at the S48E Multifunction Switch - Center Console.
2. Test for infinite resistance between the signal terminal 9 and the ground terminal 7 with the switch in the open position.

If less than infinite resistance

Replace the S48E Multifunction Switch - Center Console.

If infinite resistance

3. Test for less than 2 ohms between the signal terminal 9 and the ground terminal 7 with the switch in the closed position.

If 2 ohms or greater

Replace the S48E Multifunction Switch - Center Console.

If less than 2 ohms

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Vehicle Stability Control System Switch Replacement
• Control Module References for Body Control Module, Electronic Brake Control Module or Instrument Cluster replacement, programming and setup

Traction control/stability control indicator alfunction

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

The instrument cluster illuminates the traction/stability control indicator for five seconds after the ignition is turned ON. When the electronic brake control module detects a fault it sends a serial data message to the instrument cluster commanding the traction/stability control indicator on.

The body control module monitors the signal circuit from the traction control switch. When the traction control switch is pressed once, the body control module sends a serial data message to the electronic brake control module to disable the traction control system. The electronic brake control module will request the instrument cluster to turn the traction control off indicator ON to notify the driver of the deactivation. When the traction control switch is pressed and held for five seconds, the body control module will request the electronic brake control module to disable the traction control and the electronic stability control. The electronic brake control module will request the instrument cluster to turn the traction control off indicator and the stability control off indicator ON to notify the driver of the deactivation.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Encore)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Encore)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Verification

1. Ignition ON
2. Verify the instrument cluster indicators listed below turn On and Off when commanding the All Indicators On and Off with a scan tool.

• Stability control off indicator
• Traction control off indicator
• Traction/stability control indicator

If any indicator does not turn On and Off

Replace the P16 Instrument Cluster.

If all indicators turns On and Off

3. Verify the scan tool Electronic Brake Control Module Traction Control Switch parameter changes between Active and Inactive while pressing and releasing the traction control switch.

If the parameter does not change

Refer to Circuit/System Testing.

If the parameter changes

4. All OK.

Circuit/System Testing

1. Ignition OFF, scan tool disconnected, and all vehicle systems OFF, disconnect the harness connector at the S75 Traction Control Switch. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal 1 and ground.

If 10 ohms or greater

1. Ignition OFF
2. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.

If less than 10 ohms

3. Ignition ON.
4. Verify the scan tool Traction Control Switch parameter is Inactive.

If not Inactive

1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the signal circuit terminal 14 and ground.

• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K9 Body Control Module.

If Inactive

5. Install a 3 A fused jumper wire between the signal circuit terminal 4 and the ground circuit terminal 1.
6. Verify the scan tool Traction Control Switch parameter is Active.

If not Active

1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.

• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V

3. Test for less than 2 ohms in the signal circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K9 Body Control Module.

If Active

7. Test or replace the S75 Traction Control Switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the S75 Traction Control Switch.
2. Test for infinite resistance between the signal terminal 4 and the ground terminal 1 with the switch in the open position.

If less than infinite resistance

Replace the S75 Traction Control Switch.

If infinite resistance

3. Test for less than 2 ohms between the signal circuit terminal 4 and the ground terminal 1 with the switch in the closed position.

If 2 ohms or greater

Replace the S75 Traction Control Switch.

If less than 2 ohms

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Vehicle Stability Control System Switch Replacement
• Control Module References for Body Control Module, Electronic Brake Control Module or Instrument Cluster replacement, programming and setup

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