B1188

DTC B1188: Gauge Control Module Lost Communication with the MICU (RM 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 B1188 indicated?

YES - Go to step 5.

NO - Intermittent failure. The gauge control module is OK at this time. Check for loose or poor connections. If the connections are good, check the battery condition, and the charging system.

5. Check for DTCs with the HDS.

Are DTCs B1155, B1156, B1157, B1159, B1160, and B1188 all indicated at the same time?

YES - Replace the gauge control module (tach).

NO - Faulty MICU; replace the under-dash fuse/relay box.