C1472

C1472-TRANSFER CASE CLUTCH CONTROL CIRCUIT PERFORMANCE







- When Monitored:
Ignition on.

- Set Condition:
The Final Drive Control Module (FDCM) 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, select View 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, select View DTCs in the PCM.

Are there any PCM DTCs present?

Yes

- Before continuing with this diagnostic procedure Testing and Inspection.

No

- Go To 3

3. DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Go To 4
- Perform the TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

No

- Go To 5

4. VERIFY SET CONDITION

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

1. With the scan tool, erase DTCs.
2. Test drive vehicle on dry paved road.
3. With the scan tool, read DTCs.

Is the status Active for this DTC?

Yes

- Replace the Transfer Case Clutch Pack.
- Perform the TRANSFER CASE VERIFICATION TESTTransfer Case Verification Test.

No

- Test Complete.
- Perform the TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test
.

5. INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle test the wiring harness and connectors while checking for shorted and open circuits.
4. Using the scan tool, monitor the data related to this circuit while performing the wiggle test. Look for the data to change 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.