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DTC Troubleshooting: B1187

DTC B1187:
 Gauge Control Module Lost Communication with SRS Unit (SRS Message)
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch to LOCK (0), and then back to ON (II).
  1. Wait for 6 seconds or more.
  1. 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.■
Are any DTCs indicated?
YES -
Go to the indicated DTCs troubleshooting, then recheck.■
NO -
Go to Step 6 .
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the gauge control module 32P connector.
  1. Disconnect SRS unit connector A (39P).
  1. Check for continuity between the gauge control module 32P connector No. 29 and No. 30 terminals and SRS unit connector A (39P) No. 17 and No. 16 terminals individually.
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.■