DTC Troubleshooting: B1157

DTC B1157: Gauge Control Module Lost Communication with Multiplex Integrated Control Unit (MICU) Clear the DTC using the HDS. Cycle the ignition switch to OFF, and then back ON. Check the DTCs by selecting the DTCs MENU (DTCs) from the HDS. Is DTC B1157 indicated?
YES | - | Go to Step 4 .
NO | - | Intermittent failure. The gauge control system is OK at this time.■
Check the DTCs by selecting the DTCs MENU (DTCs) from the HDS. Is DTC B1055 and B1255 indicated?
YES | - | Go to MICU input test. ■
NO | - | Go to gauge control module input test. ■