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DTC C039F

DTC C039F

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 C039F 00

AWD Torque Signal

Circuit/System Description

The rear differential clutch control module monitors the amount of torque transferred through the rear axle. If there is a mechanical malfunction that inhibits the torque transfer process the module will then set DTC C039F.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

A mechanical malfunction exists that inhibits the torque transfer process.

Action Taken When the DTC Sets

One or more of the following actions may occur:


• All-wheel drive (AWD) is disabled.

• Service Rear Axle is displayed on the driver information center.


Conditions for Clearing the DTC


• The condition for setting the DTC is no longer present.

• The DTC is not detected in 40 consecutive ignition cycles.


Reference Information

Schematic Reference

Rear Axle Schematics

Connector End View Reference

Component Connector End Views

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

Note

The Q48 rear drive shaft gear's solenoid valve unit is calibrated with and is part of K47 rear differential clutch control module. Both components must be replaced as a matched set.



1. Engine running, vehicle stationary.

2. Verify that the status parameter for the rear drive clutch shows TEMPORARILY LIMITED on the scan tool

3. If the parameter does not show TEMPORARILY LIMITED:

3.1. Verify that the DTCs C0402, C0403, C0406 or C0407 have not been set

3.2. If any of the DTCs have been set, see Diagnostic Trouble Code (DTC) list - vehicle

3.3. If no DTC have been set:

3.4. Check that there is no internal/external leakage, no mechanical damage and that all fluid levels are at the right level. Refer to Rear Axle Lubricant Level Inspection and Differential Clutch Oil Inspection .

3.5. Clear the diagnostic trouble codes and test drive the vehicle.

3.6. Verify that DTC C039F is not set.

3.7. If the diagnostic trouble codes are reset, replace K47 rear differential clutch control module and Q48 rear drive shaft gear's solenoid valve unit.

3.8. If DTCs are not set:

3.9. Everything is OK

4. If the parameter shows TEMPORARILY LIMITED:

5. Everything is OK


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for rear differential clutch control module replacement, setup, and programming