U0101: Perte de communication avec le calculateur de boîte (TCM)
Perte de communication avec le calculateur de boîte (TCM) : CAN-bus heartbeat frames from the Transmission Control Module are missing.
| Trouble Code (DTC) | U0101 |
|---|---|
| Official SAE Definition | Perte de communication avec le calculateur de boîte (TCM) |
| Vehicle Subsystem | network |
| Driving Severity | HIGH |
Observable Symptoms
- Gear indicator blank (PRNDL missing)
- Transmission locked in limp gear or no-crank
Most Probable Root Causes
- Blown TCM fuse or damaged gearbox harness connector
- ATF wicking into mechatronic connector pins
- Internal TCM failure
Step-by-Step Diagnostic Procedure
- Verify power and ground at TCM harness plug
- Check CAN-H / CAN-L continuity to TCM