Buick Encore Owners & Service Manuals

Buick Encore: Schematic wiring diagrams

Buick Encore 2012-2019 Service Manual / Drivline & Axle / Rear Drive Axle / Schematic wiring diagrams

SPECIFICATIONS

FASTENER TIGHTENING SPECIFICATIONS

Fastener Tightening Specifications

Fastener Tightening Specifications

LUBRICATION SPECIFICATIONS

Capacities

Capacities

SCHEMATIC WIRING DIAGRAMS

REAR AXLE WIRING SCHEMATICS (ENCORE)

Rear Differential Clutch Control Module

Fig. 1: Rear Differential Clutch Control Module
Fig. 1: Rear Differential Clutch Control Module

REAR AXLE WIRING SCHEMATICS (Encore)

Rear Differential Clutch Control Module

Fig. 2: Rear Differential Clutch Control Module
Fig. 2: Rear Differential Clutch Control Module

Diagnostic information and procedures

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

DTC C0417: REAR DRIVE CLUTCH CONTROL SOLENOID VALVE CONTROL 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 C0417 01

Rear Drive Clutch Control Solenoid Valve Control Circuit Short to Battery

DTC C0417 02

Rear Drive Clutch Control Solenoid Valve Control Circuit Short to Ground

DTC C0417 04

Rear Drive Clutch Control Solenoid Valve Control Circuit Open

Diagnostic Fault Information

Diagnostic Fault Information

Circuit/System Description

The rear differential clutch control module provides power and ground switching circuits to the rear drive clutch coil. The coil receives current from the rear differential clutch control module through PWM high side driver, and converts that signal into torque through the clutch to the rear tires when all wheel drive (AWD) is requested.

Conditions for Running the DTC

  • The ignition is ON.
  • Battery voltage is between 9-16 volts.

Conditions for Setting the DTC

  • An open is detected on the high or low coil control circuits.
  • A short to ground is detected on the high or low coil control circuits.
  • A short to voltage is detected on the high coil control circuits.

Action Taken When the DTC Sets

One or more of the following actions may occur:

  • All Wheel Drive Off or code 173 (AWD Disabled) will be displayed in the Driver Information Center.
  • Service All Wheel Drive or code 73 (Service AWD) will be displayed in the Driver Information Center.

Conditions for Clearing the DTC

  • The condition for the DTC is no longer present.
  • The DTC is not detected in 40 consecutive drive cycles.

Reference Information

Schematic Reference

Rear Axle Schematics (Encore), Rear Axle 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

Rear Drive Axle 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 Q28 Rear Drive Clutch, ignition ON.
  2. Test for 3-5 V between the control circuit terminal B and ground.
  • If less than 3 V
  1. Ignition OFF, disconnect the harness connector at the K47 Rear Differential Clutch Control Module.
  2. Test for infinite resistance between the control circuit and ground.
  • If less than infinite resistance, repair the short to ground on the circuit.
  • If infinite resistance
  1. Test for less than 2 ohms in the control circuit end to end.
  • If 2 ohms or greater, repair the open/high resistance in the circuit.
  • If less than 2 ohms, replace the K47 Rear Differential Clutch Control Module.

If greater than 5 V

  1. Ignition OFF, disconnect the harness connector at the K47 Rear Differential Clutch Control Module, ignition ON.
  2. Test for less than 1 V between the control circuit and ground.
  • If 1 V or greater, repair the short to voltage on the circuit.
  • If less than 1 V, replace the K47 Rear Differential Clutch Control Module.

If between 3-5 V

  1. Test for less than 1 V between the control circuit terminal A and ground.

If 1 V of greater

  1. Ignition OFF, disconnect the X2 harness connector at the K47 Rear Differential Clutch Control Module.
  2. Test for less than 1 V between the control circuit and ground.
  • If 1 V or greater, repair the short to voltage on the circuit.
  • If less the 1 V, replace the K47 Rear Differential Clutch Control Module.

If less than 1 V

  1. Ignition OFF, connect the harness connector at the Q28 Rear Drive Clutch. Disconnect the X2 harness connector at the K47 Rear Differential Clutch Control Module.
  2. Test for infinite resistance between the control circuit terminal A and ground.

If less than infinite resistance

  1. Ignition OFF, disconnect the harness connector at the Q28 Rear Drive Clutch.
  2. Test for infinite resistance between the control circuit and ground.
  • If less than infinite resistance, repair the short to ground on the circuit.
  • If infinite resistance, replace the Q28 Rear Drive Clutch.

If infinite resistance

  1. Test for 1.5-2.5 ohms between the control circuit terminal A and the control circuit terminal B.
  2. Test for infinite resistance between the control circuit and ground.

If not between 1.5-2.5 ohms

  1. Ignition OFF, disconnect the harness connector at the Q28 Rear Drive Clutch.
  2. Test for less than 2 ohms between the K47 Rear Differential Clutch Control Module control circuit terminal A and the Q28 Rear Drive Clutch control circuit terminal A.
  • If 2 ohms or greater, repair the open/high resistance on the circuit.
  • If less than 2 ohms, test or replace the Q28 Rear Drive Clutch.

If between 1.5-2.5 ohms

  1. Replace the K47 Rear Differential Clutch Control Module.

Component Testing

Static Test

  1. Ignition OFF, disconnect the harness at the Q28 Rear Drive Clutch.
  2. Test for 1.5-2.5 ohms between the control terminal B and the low reference terminal A.

If not between 1.5-2.5 ohms

Replace the Q28 Rear Drive Clutch.

If between 1.5-2.5 ohms

  1. Test for infinite resistance between each terminal and the Q28 Rear Drive Clutch case.

If not infinite resistance

Replace the Q28 Rear Drive Clutch.

If infinite resistance

  1. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

  • Differential Clutch Replacement
  • Control Module References for Rear Differential Clutch Control Module replacement, programming, and setup

DTC C0561: System disabled information stored

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 00

System Disabled Information Stored

Circuit/System Description

The rear differential clutch control module receives messages from other modules over serial data which are needed to perform all wheel drive (AWD) functions.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The rear differential clutch control module receives an invalid message from the electronic brake control module (EBCM) over the serial data circuit which causes the rear drive clutch control module to deactivate.

Action Taken When the DTC Sets

One or more of the following actions may occur:

  • All Wheel Drive Off or code 173 (AWD Disabled) will be displayed in the Driver Information Center.
  • Service All Wheel Drive or code 73 (Service AWD) will be displayed in the Driver Information Center

Conditions for Clearing the DTC

  • The condition for the DTC is no longer present.
  • The DTC is not detected in 40 consecutive drive cycles.

Diagnostic Aids

DTC C0561 is an indicator that the rear differential clutch control module receives an invalid message from the EBCM and does not necessarily indicate a fault is present with the rear drive clutch control module. This DTC should not be used as a fault indicator but rather as a symptom to assist in the diagnosis of these other systems.

The EBCM should be checked for possible faults.

Reference Information

Schematic Reference

Rear Axle Schematics (Encore), Rear Axle 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

Rear Drive Axle 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 in the K17 Electronic Brake Control Module.

If any other DTCs are set

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

If no other DTCs are set

  1. Replace the K17 Electronic Brake Control Module.
  2. Verify the DTC does not set while operating the vehicle under the Conditions for Running the DTC.
  • If the DTC sets

Replace the K47 Electronic Rear Differential Control Module.

If the DTC does not set

  1. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module and Electronic Rear Differential Control Module replacement, programming and setup.

DTC C056E: Electronic control unit software

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 C056E

Electronic Control Unit Software

For symptom byte information, refer to Symptom Byte List .

Circuit/System Description

Some devices must be configured with specific software, serial numbers, vehicle options, or other information.

If a device was not properly configured after installation that module may set DTC C056E. The symptom byte information is for engineering reference only. No external circuit diagnosis is involved.

Conditions for Running the DTC

Battery voltage is between 9-16 V and data link communications operate normally.

Conditions for Setting the DTC

The device is not configured properly.

Conditions for Clearing the DTC

  • A current DTC clears when the malfunction is no longer present.
  • A history DTC clears when the device ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

Reference Information

Schematic Reference

Data Communication Schematics (Encore) , Data Communication 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

Data Link Communications Description and Operation

Electrical Information Reference

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

Scan Tool References

Control Module References for scan tool information

Circuit/System Verification

  1. Ignition ON.
  2. Verify DTC C056E is not set.

If DTC C056E is set

  1. Program the device that set the DTC.
  2. Verify the DTC does not set.
  • If the DTC sets, replace the device that set the DTC.
  • If the DTC does not set
  1. All OK.

If DTC C056E is not set

  1. All OK

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for device replacement, programming and setup

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