B1170

DTC B1170: Gauge Control Module Lost Communication with VSA Modulator-Control Unit (VSA Message)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test mode A.

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF and then back ON (II).
3. Check for the DTCs with the HDS.

Is DTC B1170 indicated?

YES - Go to step 4.

NO - Intermittent failure. The F-CAN communication line is OK at this time. Check for loose or poor connections. If the connections are good, check the battery condition and the charging system.

4. Check for the DTCs in the PCM with the HDS. Are any DTCs indicated?

YES - Troubleshoot the indicated PCM DTCs.

NO - Go to step 5.

5. Do the Gauge Control Module Input Test.

Are all inputs OK?

YES - Go to step 6.

NO - Repair the faulty input, then recheck the DTCs.

6. Substitute a known-good gauge control module.
7. Clear the DTCs with the HDS.
8. Turn the ignition switch OFF and then back ON (II).
9. Check for the DTCs with the HDS.

Is DTC B1170 indicated?

YES - Replace the VSA modulator-control unit.

NO - The original gauge control module is faulty; replace it.