DTC Troubleshooting: B1157

DTC B1157:  Gauge Control Module Lost Communication with the MICU (MICU Message)

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 B1157 indicated?


YES - Go to 5.


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


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).n


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