C145F

C145F-AWD SYSTEM TEMPORARILY DISABLED - OVERTEMPERATURE



- When Monitored:
Ignition on.

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





Always perform the AWD Pre-Diagnostic Troubleshooting procedure before proceeding. Testing and Inspection.

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

- Testing and Inspection Perform the appropriate diagnostic procedure.

No

- Go To 2

2. DTC IS ACTIVE

NOTE: If C1456, C145A or C145D has set along with this DTC, diagnose those DTC(s) first before continuing with this test.

1. Ignition on, engine not running.
2. With the scan tool, read DTCs.

Is the status Active for this DTC?

Yes

- Go To 3

No

- Go To 5

3. VERIFY SET CONDITION

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

1. With the scan tool, record and 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

- Go To 4

No

- Test Complete.
- Perform the AWD Control Module VERIFICATION TEST. AWD Control Module Verification Test.

4. AWD CONTROL MODULE

NOTE: Before continuing, check the AWD Control Module harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

1. Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

Were there any problems found?

Yes

- Repair as necessary.
- Perform the AWD Control Module VERIFICATION TEST. AWD Control Module Verification Test.

No

- Replace All Wheel Drive (AWD) Control Module.
- Perform the AWD Control Module VERIFICATION TEST. AWD Control Module 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 AWD Control Module VERIFICATION TEST. AWD Control Module Verification Test.

No

- Test complete.