B1170

DTC Troubleshooting: B1170

DTC B1170: Gauge Control Module Lost Communication with the 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. Troubleshooting - B-CAN System Diagnosis Test Mode A

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Start and run the engine for at least 5 seconds then turn the engine off.

4. Check for DTCs with the HDS.

Is DTC B1170 indicated?
YES - Go to step 5.

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, Testing and Inspection and the charging system.


5. Check for DTCs in the PCM/VSA with the HDS.

Are any DTCs indicated?
YES - Troubleshoot the PCM/VSA DTCs.

NO - Go to step 6.


6. Turn the ignition switch to LOCK (0).

7. Disconnect VSA modulator-control unit 46P connector.

8. Disconnect the gauge control module 36P connector.

9. Check for continuity between gauge control module 36P connector terminals No. 28 and No. 29 and VSA modulator-control unit 46P connector terminals No. 39 and No. 38 respectively.

Is there continuity?
YES - Go to step 10.

NO - Repair an open in the wire between the gauge control module and the VSA modulator-control unit.






10. Check for poor connections, power, and ground to the VSA modulator-control unit. If OK, substitute a known-good VSA modulator-control unit.

11. Check for DTCs with the HDS.

Is DTC B1170 indicated?
YES - Replace the gauge control module.

NO - Replace the original VSA modulator-control unit.