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

WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Clear the DTCs with the HDS.
Turn the ignition switch to LOCK (0) and then back to ON (II).
Wait for at least 6 seconds.
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.
Check for SRS DTCs with the HDS (see READING THE DTC ).
Are any DTCs Indicated?

YES -Go to the indicated DTC's troubleshooting, then recheck.

NO -Go to step 6.
Turn the ignition switch to LOCK (0).
Disconnect the gauge control module 32P connector.
Disconnect SRS unit connector A (39P).
Check for continuity between gauge control module 32P connector terminals No. 19 and No. 20 and SRS unit connector A (39P) terminals No. 16 and No. 17 respectively.

Fig 1: Checking Continuity Between Gauge Control Module 32P Connector Terminals No. 19 And SRS Unit Connector A (39P) Terminals No. 16
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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 (see GAUGE CONTROL MODULE REPLACEMENT ).

NO -Repair an open in the wire.