B1170

DTC Troubleshooting: B1170

DTC B1170:

Gauge Control Module Lost Communication With the VSA/ABS Modulator-Control Unit (VSA/ABS Message)

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

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 the 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 with the HDS.

Is DTC B1178 also indicated at the same time?

YES -

Troubleshoot DTC B1178 B1178.�

NO -

Go to step 6.

6. Check for DTCs in the ECM/PCM and VSA with the HDS.

Are any DTCs indicated?

YES -

Troubleshoot the ECM/PCM and VSA DTCs.�

NO -

Go to step 7.

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

8. Disconnect the gauge control module 36P connector.

9. Disconnect the VSA modulator-control unit 47P connector.

10. Check for continuity between gauge control module 36P connector terminals No. 28 and No. 29 and VSA modulator-control unit 47P connector terminals No. 15 and No. 11 respectively.





Is there continuity?

YES -

Substitute a known-good VSA modulator-control unit Service and Repair, and recheck. If the indication goes away, replace the original VSA modulator-control unit. If the DTC is still present, replace the gauge control module Service and Repair.�

NO -

Repair an open or poor connection in the wire between the VSA modulator-control unit and the gauge control module.�