DTC Troubleshooting: B1007

DTC B1007: MICU Lost Communication with the Combination Switch Control Unit (Headlight Switch Message) Clear the DTCs using the HDS. Cycle the ignition switch to OFF, and then back ON. Check for DTCs by the DTCs MENU (DTCs) from the HDS. Is DTC B1007 indicated?
YES | - | Go to Step 4 .
NO | - | Intermittent failure, the MICU is OK at this time.■
Check for DTCs of the gauge control module and relay control module by selecting the DTCs MENU (DTCs) from the HDS. Is DTC B1155 and B1062 indicated?
YES | - | Go to the combination switch control unit input test. ■
NO | - | Check for an open, or a short to power or ground in the communication circuit between the MICU and the combination switch control unit. If the circuit is OK, replace the MICU . If the circuit is bad, repair the open, or short to power or ground.■