DTC Troubleshooting: B1188
DTC B1188:
 Gauge Control Module (Tach) Lost Communication with MICU (RM 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 B1188 indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure, the gauge control module (tach) is OK at this time. Check for loose or poor connections between the gauge control module (tach) and the MICU.■
  1. Check for DTCs with the HDS.
Are DTCs B1188 and B1905 indicated?
YES -
Faulty MICU; replace the under-dash fuse/relay box. ■
NO -
Replace the gauge control module (tach). ■