PRE-RELEASE
DTC C039F
| DTC C039F |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| 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:
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All-wheel drive (AWD) is disabled.
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Service Rear Axle is displayed on the driver information center.
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| Conditions for Clearing the DTC |
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The condition for setting the DTC is no longer present.
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The DTC is not detected in 40 consecutive ignition cycles.
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| 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
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Verification |
| Note | ||
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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.
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| 2. |
Verify that the status parameter for the rear drive clutch shows TEMPORARILY LIMITED on the scan tool
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| 3. |
If the parameter does not show TEMPORARILY LIMITED:
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| 3.1. |
Verify that the DTCs C0402, C0403, C0406 or C0407 have not been set
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| 3.2. |
If any of the DTCs have been set, see
Diagnostic Trouble Code (DTC) list - vehicle
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| 3.3. |
If no DTC have been set:
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| 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
.
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| 3.5. |
Clear the diagnostic trouble codes and test drive the vehicle.
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| 3.6. |
Verify that DTC C039F is not set.
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| 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.
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| 3.8. |
If DTCs are not set:
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| 3.9. |
Everything is OK
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| 4. |
If the parameter shows TEMPORARILY LIMITED:
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| 5. |
Everything is OK
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| 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
