U0101-LOST COMMUNICATION WITH TCM
For a complete wiring diagram, refer to the Wiring Information.
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When Monitored:
Ignition run time is greater than one second.
Battery voltage between 10.0 and 16.0 Volts.
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Set Condition:
The Powertrain Control Module (PCM) doesn't receive a Bus Message from the Transmission Control Module for approximately two to five seconds.
Possible Causes |
|---|
| CAN BUS CIRCUITS OPEN OR SHORTED |
| DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES |
| TIPM NOT CONFIGURED CORRECTLY |
| TRANSMISSION CONTROL MODULE (TCM) |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
DTC IS ACTIVE
| 1. | Ignition on, engine not running. |
| 2. | With the scan tool, select view DTCs. |
| 3. | Monitor the scan tool for at least two minutes. |
Is the status Active for this DTC?
Yes
- (Refer to 28–DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)-Diagnosis and Testing), and perform the diagnostic procedure for U0101 - LOST COMMUNICATION WITH TRANSMISSION CONTROL MODULE (TCM).
No
- (Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) and perform the Stored Lost Communication DTCs diagnostic procedure.