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

- If the HDS does not communicate with the VSA modulator-control unit, the VSA indicator stay on, and no VSA DTCs are stored, go to symptom troubleshooting for ABS indicator, brake system indicator, and VSA indicator do not go off, and no DTCs are stored. Symptom Troubleshooting

1. Clear the DTCs with the HDS.

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

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

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

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections between the gauge control module (tach) and the VSA modulator-control unit.


5. Check for VSA system DTCs with the HDS.

Is any DTCs indicated?
YES - Go to the indicated DTCs, then recheck.

NO - Go to step 6.


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

7. Disconnect the gauge control module (tach) 36P connector.

8. Disconnect the VSA modulator-control unit 37P connector.

9. Connect the gauge control module (tach) 36P connector terminals No. 1 and No. 19 and body ground with jumper wires.






10. Check for continuity between the VSA modulator-control unit 37P connector terminals No. 1 and No. 15 and body ground individually.

Is there continuity?
YES - Substitute a known-good VSA modulator-control unit, and recheck. If the indication goes away, replace the original VSA modulator-control unit. Service and Repair If the DTC is still present, replace the gauge control module (tach). Gauge Control Module Replacement

NO - Repair open in the wire.