B1806

DTC Troubleshooting: B1806, B1810, B1811

DTC B1806: Power Seat Control Unit Lost Communication with MICU (MICU Message)

DTC B1810: Power Seat Control Unit Lost Communication with MICU (MIRRORSW Message)

DTC B1811: Power Seat Control Unit Lost Communication with MICU (DOORSW 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 ON (II).

3. Wait for more than 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1806, B1810, and/or B1811 indicated?
YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connection between the power seat control unit and the MICU.


5. Check for DTCs with the HDS.

Are DTCs B1055, B1057, B1157, B1159, B1255, B1355, B1955, B2155, B2156, and B2161 also indicated?
YES - Do the MICU input test. Multiplex Integrated Control System MICU Input Test

NO - Do the power seat control unit input test. Testing and Inspection