B1157

DTC Troubleshooting: B1157

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

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A. Troubleshooting - B-CAN System Diagnosis Test Mode A

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Check for DTCs with the HDS.

Is DTC B1157 indicated?
YES - Go to step 4.

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 Testing and Inspection, and the charging system.


4. Check for DTCs with the HDS.

Are DTCs B1157 and B1605 indicated at the same time?
YES - Faulty MICU; replace the under-dash fuse/relay box. Under-Dash Fuse/Relay Box Removal and Installation

NO - Replace the gauge control module (tach). Gauge Control Module Replacement