DTC B1157: Gauge Control Module Lost Communication with Multiplex Integrated Control Unit (MICU)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Clear the DTCs with the HDS.
Turn the ignition switch OFF, and then back ON (II).
Wait for 6 seconds or more.
Check for DTCs with the HDS.
Is DTC B1157 indicated?
1. YES - Go to step 5.
2. NO - Intermittent failure. The gauge control system is OK at this time. Check for loose or poor connections.
Check for DTCs with the HDS.
Are DTCs B1055, B1106, B1255, B1355, B1556, B1806, B1955, B2005, and B2055 also indicated?
1. YES - Go to multiplex integrated control unit input test (see MULTIPLEX INTEGRATED CONTROL UNIT INPUT TEST ).
2. NO - Go to gauge control module input test (see GAUGE CONTROL MODULE INPUT TEST ).