B1168

DTC Troubleshooting: B1168

DTC B1168:

Gauge Control Module Lost Communication With the PCM (Engine Messages)

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. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1168 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections.

5. Check for Fuel and Emission system DTCs with the HDS Initial Inspection and Diagnostic Overview.

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 32P connector.

8. Jump the SCS with the HDS.

9. Disconnect PCM connector A (49P).

10. Check for continuity between gauge control module 32P connector terminals No. 20 and No. 19 and PCM connector terminals A (49P) terminals No. 4 and No. 3 respectively.





Is there continuity?

YES -

Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM, and recheck. If the indication goes away, replace the original PCM Service and Repair. If the DTC is still present, replace the gauge control module Service and Repair.

NO -

Repair an open in the wire.