U0102-LOST COMMUNICATION WITH TRANSFER CASE CONTROL MODULE
For a complete wiring diagram Refer to Section 8W
- When Monitored:
Continuously while the system is active.
- Set Condition:
The ECM doesn't receive a Bus Message from the Transfer Case Control Module.
| Possible Causes |
| INTERMITTENT DTC |
| CAN BUS OPEN OR SHORTED CONDITION |
| TRANSFER CASE CONTROL MODULE |
| ENGINE CONTROL MODULE (ECM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
Diagnostic Test
1. DTC IS ACTIVEIgnition on, engine not running.
With the scan tool, clear DTCs in the Engine Control Module (ECM).
Monitor the scan tool for at least two minutes.
Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time.
Start the engine.
Allow the engine to reach normal operating temperature.
With the scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
- Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for diagnostic procedures and for further possible causes.
No
- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)