DTC Troubleshooting: B1187
DTC B1187:
 Gauge Control Module (Tach) Lost Communication with SRS Unit (SRS Message)
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch OFF, and then back 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.■
  1. Check for SRS DTCs with the HDS.
Is any DTCs indicated?
YES -
Go to the indicated DTCs, then recheck.
NO -
Go to Step 6 .
  1. Turn the ignition switch OFF.
  1. Disconnect the gauge control module (tach) 36P connector.
  1. Disconnect the SRS unit connector A (28P).
  1. Connect the gauge control module (tach) 36P connector No. 1 and No. 19 terminals and body ground with jumper wires.