Buick Encore: Schematic wiring diagrams
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
Fastener Tightening Specifications
LUBRICATION SPECIFICATIONS
Capacities
SCHEMATIC WIRING DIAGRAMS
REAR AXLE WIRING SCHEMATICS (ENCORE)
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
Diagnostic information and procedures
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
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
- Ignition OFF and all vehicle systems OFF, disconnect the harness
connector at the Q28 Rear Drive
Clutch, ignition ON.
- Test for 3-5 V between the control circuit terminal B and ground.
- Ignition OFF, disconnect the harness connector at the K47 Rear
Differential Clutch Control
Module.
- 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
- 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
- Ignition OFF, disconnect the harness connector at the K47 Rear
Differential Clutch Control
Module, ignition ON.
- 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
- Test for less than 1 V between the control circuit terminal A and ground.
If 1 V of greater
- Ignition OFF, disconnect the X2 harness connector at the K47 Rear
Differential Clutch Control
Module.
- 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
- 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.
- Test for infinite resistance between the control circuit terminal A and
ground.
If less than infinite resistance
- Ignition OFF, disconnect the harness connector at the Q28 Rear Drive
Clutch.
- 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
- Test for 1.5-2.5 ohms between the control circuit terminal A and the
control circuit terminal B.
- Test for infinite resistance between the control circuit and ground.
If not between 1.5-2.5 ohms
- Ignition OFF, disconnect the harness connector at the Q28 Rear Drive
Clutch.
- 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
- Replace the K47 Rear Differential Clutch Control Module.
Component Testing
Static Test
- Ignition OFF, disconnect the harness at the Q28 Rear Drive Clutch.
- 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
- 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
- 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
- Ignition ON.
- 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
- Replace the K17 Electronic Brake Control Module.
- Verify the DTC does not set while operating the vehicle under the
Conditions for Running the DTC.
Replace the K47 Electronic Rear Differential Control Module.
If the DTC does not set
- 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
- Ignition ON.
- Verify DTC C056E is not set.
If DTC C056E is set
- Program the device that set the DTC.
- Verify the DTC does not set.
- If the DTC sets, replace the device that set the DTC.
- If the DTC does not set
- All OK.
If DTC C056E is not set
- All OK
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for device replacement, programming and setup
READ NEXT:
Rear wheel drive module differential clutch control module replacement
Removal Procedure
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
.
NOTE: The propeller shaft does n
Rear drive axle description and operation
The rear differential assembly in this vehicle consists of an aluminum
housing which contains a electric
clutch/coupler and a differential. The differential
SEE MORE:
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