Possible Causes
| Possible Causes |
|---|
| ECU POWER SUPPLY (FUSED B+ OR IGNITION) CIRCUIT(S) OPEN OR SHORTED TO GROUND |
| ECU GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE |
| POOR CONNECTION(S) AT ECU HARNESS CONNECTOR(S) |
| OPEN OR SHORTED ETHERNET CIRCUIT |
| RESPONDER MODULE ON ETHERNET NETWORK |
| COMMANDER MODULE ON ETHERNET NETWORK |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .