DTC U0122: Gauge Control Module Lost Communication With VSA Modulator-Control Unit
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0) and then back to ON (II).
- Wait for at least 6 seconds.
- Check for DTCs with the HDS.
Is DTC U0122 indicated?
YES -Go to step 5.
NO -Intermittent failure, the F-CAN communication line is OK at this time. Check for DTCs in the PCM and the VSA modulator-control unit with the HDS. If F-CAN DTCs are present, check for a loose VSA ground or poor connections at the VSA modulator-control unit or gauge control module. If the connections are good, check the battery condition and the charging system, then clear all DTCs.
- Check for DTCs in the PCM or VSA with the HDS.
Are any DTCs indicated?
YES -Go to the PCM or VSA indicated DTC'S TROUBLESHOOTING .
NO -Go to step 6.
- Do the gauge control module input test (see GAUGE CONTROL MODULE INPUT TEST
).
Are all inputs OK?
YES -Go to step 7.
NO -Repair the faulty input, then recheck the DTCs.
- Substitute a known-good gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0) and then back to ON (II).
- Check for DTCs with the HDS.
Is DTC U0122 indicated?
YES -Recheck PCM for DTCs, then recheck the VSA modulator-control unit for DTCs.
NO -The original gauge control module is faulty; replace it (see GAUGE CONTROL MODULE REPLACEMENT ).