B1187

DTC B1187: Gauge Control Module Lost Communication with the SRS Unit (SRS Message)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Wait for 6 seconds or more.
4. Check for DTCs with the HDS.

Is DTC B1187 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 and the SRS unit.

5. Check for SRS DTCs with the HDS.

Is any DTCs indicated?

YES - Go to the indicated DTCs troubleshooting, then recheck.

NO - Go to step 6.

6. Turn the ignition switch OFF.
7. Disconnect the gauge control module 36P connector.
8. Disconnect the SRS unit connector A (28P).




9. Check for continuity between the gauge control module 36P connector No. 33 and No.34 terminals and the SRS unit connector A (28P) No. 12 and No. 11 terminals respectively.

Is there continuity?

YES - Substitute a known-good SRS unit, and recheck. If the indication goes away, replace the original SRS unit. If the DTC is still present, replace the gauge control module.

NO - Repair an open in the wire.