B1187

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

1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), 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.

Are there 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 gauge control module connector A (12P).
8. Disconnect SRS unit connector A.
9. Check for continuity between the gauge control module connector A (12P) No. 6 and the SRS unit connector A (28P) No. 12 terminal, and between the gauge control module connector A (12P) No. 12 terminal and the SRS unit connector A (28P) No. 11 terminal.






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 open in the wire.