C1472

C1472-TRANSFER CASE CLUTCH CONTROL CIRCUIT PERFORMANCE

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Ignition on.

- Set Condition:
The Drive Train Control Module (DTCM) detects an overheat condition due to excessive difference in speed across the Transfer Case from hard driving conditions (Mud, Sand, Snow, 2WD Chassis dynamometer etc.).





1. ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DTCS PRESENT
1. Ignition on, engine not running.
2. With the scan tool, read DTCs in the ABS Module.

Are there any ABS DTCs present?

Yes

- Perform the appropriate diagnostic procedure. Testing and Inspection.

No

- Go To 2

2. POWER CONTROL MODULE (PCM) DTCS PRESENT
1. Ignition on, engine not running.
2. With the scan tool, read DTCs in the PCM.

Are there any PCM DTCs present?

Yes

- Before continuing with this diagnostic procedure. Testing and Inspection Perform the appropriate PCM diagnostic procedures.

No

- Go To 3

3. DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, read DTCs in the DTCM.

Is the status Active for this DTC?

Yes

- Go To 4

No

- Go To 6

4. VERIFY SET CONDITION

NOTE: Check with the customer on driving terrain (e.g. mud, sand, snow) for set condition.

1. With the scan tool, record and erase DTCs.
2. Test drive vehicle on dry paved road.
3. During the test drive, move the Transfer Case Selector Switch (if equipped) to each position several times.
4. With the scan tool, read DTCs.

Is the status Active for this DTC?

Yes

- Go To 5

No

- Go To 6

5. TRANSFER CASE CLUTCH PACK
1. Turn the ignition off to the lock position
2. Replace the Transfer Case Clutch Pack.Perform the TRANSFER CASE VERIFICATION TEST. Transfer Case Verification Test.
3. Ignition on, engine not running.
4. With the scan tool, clear Stored DTCs in the DTCM.
5. Test drive vehicle on dry paved road.
6. During the test drive, move the Transfer Case Selector Switch (if equipped) to each position several times.
7. With the scan tool, read DTCs in the DTCM.

Does this DTC reset?

Yes

- Replace the Drive Train Control Module (DTCM).
- Perform the DTCM VERIFICATION TEST. DTCM Verification Test.

No

- Test Complete.

6. INTERMITTENT WIRING HARNESS AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the wiring diagram/schematic as a guide, inspect the wiring harness and connectors.
3. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
4. Look for the data to change or for the DTC to reset during the wiggle test.
5. While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times.
6. Look for the data to change other than as expected or for the DTC to reset.

Were there any problems found?

Yes

- Repair as necessary.
- Perform the TRANSFER CASE VERIFICATION TEST. Transfer Case Verification Test.

No

- Test Complete.