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.

5. Check for SRS DTCs with the HDS.

Are 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 connector A (30P).
8. Disconnect the negative cable from the battery, and wait at least 3 minutes before beginning work.
9. Disconnect the SRS unit connector A (28P).




10. Check for continuity between the gauge control module connector A (30P) No. 13 and No. 14 terminals and the SRS unit connector A (28P) No. 20 and No. 21 terminals.

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.