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 gauge control module is OK at this time.

5. Check for DTCs in the SRS with the HDS.

Are any DTCs indicated?

YES - Troubleshooting the SRS DTCs.

NO - Go to step 6.

6. Turn the ignition switch OFF.
7. Disconnect the gauge control module 36P connector.
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 SRS unit connector A (28P) terminals No. 11 and No. 12 and gauge control module 36P connector No. 28 and No. 29 terminals.

Are there continuity?

YES - Substitute a known-good SRS unit, and recheck. If DTC B1187 is indicated again, replace the gauge control module.

NO - Repair an open in the wire.