DTC B1168: Gauge Control Module Lost Communication with ECM/PCM (Engine Messages); DTC B1169: Gauge Control Module Lost Communication with the PCM (A/T Messages); DTC B1170: Gauge Control Module Lost Communication with the ABS/VSA modulator-Control Unit (ABS/VSA message); DTC B1178: F-CAN Communication Line Error; DTC B1187: Gauge Control Module Lost Communication with the SRS Unit (SRS Message)
- Clear the DTCs using the HDS.
- Turn the ignition switch OFF, and then back ON (II).
- Start and run the engine for at least 5 seconds then turn the engine off.
- Check for DTCs with the HDS.
Is DTC B1168, B1169, B1170, B1178, and/or B1187 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 ), and the charging system.
- Check for DTCs in the ECM/PCM or ABS/VSA.
Are any DTCs indicated?
YES -Troubleshoot the ECM/PCM or ABS/VSA.
NO -Go to step 6.
- Do the Gauge Control Module Input Test (see GAUGE CONTROL MODULE (TACH) INPUT TEST
).
Are all inputs OK?
YES -Go to step 7.
NO -Repair the faulty input then recheck for DTCs.
- Substitute a known-good gauge control module (tach).
- 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 then turn the engine off.
- Check for DTCs with the HDS.
Is DTC B1168, B1169, B1170, B1178, and/or B1187 indicated?
YES -Substitute a known-good ECM/PCM and retest. If the system/indication goes away, replace the original ECM/PCM.
NO -The original gauge control module (tach) is faulty; replace the GAUGE CONTROL MODULE (TACH) (see GAUGE CONTROL MODULE REPLACEMENT ).