DTC B1170: Gauge Control Module Lost Communication With VSA Modulator-Control Unit (VSA Message)
- Clear the DTCs with the HDS.
- Turn the ignition switch OFF, and then back ON (II).
- Start and run the engine for at least 5 seconds the turn the engine off.
- 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 (see BATTERY TEST ), and the charging system.
- Check for DTCs with the HDS.
Is DTC B1178 also indicated at the same time?
YES - Troubleshoot DTC B1178 (see DTC B1178: F-CAN COMMUNICATION LINE ERROR ).
NO - Go to step 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.
- Turn the ignition switch OFF.
- Disconnect the gauge control module 36P connector.
- Disconnect the VSA modulator-control unit 47P connector.
- Check for continuity between the No. 28 and No. 29 terminals of the gauge control module 36P connector and the No. 15 and No. 11 terminals of the VSA modulator-control unit 47P connector respectively.
Is there continuity?
YES - Substitiute a known-good VSA modulator-control unit, refer to VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION 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, refer to Gauge Control Module Replacement
NO - Repair an open or poor connection in the wire between the VSA modulator-control unit and the gauge control module.
- Check for poor connections, power, and ground to the VSA modulator-control unit. If OK, substitute a known-good VSA modulator-control unit.
- Check for DTCs with the HDS.
Is DTC B1170 indicated?
YES - Replace the gauge control module.
NO - Replace the original VSA modulator-control unit.