U0122-LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE
For a complete wiring diagram, refer to the Wiring Information.
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When Monitored:
Continuously while the system is active.
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Set Condition:
The Powertrain Control Module (PCM) doesn't receive a Bus Message from the Anti-lock Brake Module.
Possible Causes |
|---|
| DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES |
| CAN BUS OPEN OR SHORTED CONDITION |
| TIPM NOT CONFIGURED CORRECTLY |
| ANTI-LOCK BRAKE MODULE |
| 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, clear DTCs in the PCM. |
| 3. | Monitor the scan tool for at least two minutes. |
| 4. | Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time. |
| 5. | Start the engine. |
| 6. | Allow the engine to reach normal operating temperature. |
| 7. | With the scan tool, select View DTCs. |
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 U0121-Lost Communication with Anti-Lock Brake Module diagnostic procedure.
No
- (Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) and perform the Stored Lost Communication DTCs diagnostic procedure.