DTC B1255: Combination Switch Control Unit Lost Communication With 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).
- Check for DTCs with the HDS.
Is DTC B1255 indicated?
YES -Go to step 4.
NO -Intermittent failure, MICU is OK at this time. Check for loose or poor connection at combination switch control unit connector (8P), and at under-dash fuse/relay box connector X (39P). If the connections are good, check the battery condition (see BATTERY TEST ) and the charging system.
- Check for DTCs with the HDS.
Are DTCs B1055, B1157, B1555 and B1806 also indicated?
YES -Go to MICU Input Test (see MICU INPUT TEST ).
NO -Replace the combination switch control unit.