B1807

DTC B1807: Power Seat Control Unit Lost Communication with MICU (Door Switch Message)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis test mode A.

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Check for DTCs with the HDS.

Is DTC B1807 indicated?

YES - Go to step 4.

NO - Check for poor connections. If OK, check battery condition and charging system.

4. Check for DTCs with the HDS.

Are DTCs B1057 and B1159 indicated?

YES - Go to step 7.

NO - Go to step 5.

5. Turn the ignition switch OFF.
6. Do the power seat control unit input test.

Is the input test OK?

YES - Faulty power seat control unit.

NO - Refer to the power seat control unit input test Power Seat Control Unit Input Test and correct the cause.

7. Turn the ignition switch OFF.
8. Do the multiplex integrated control unit input test.

Is the input test OK?

YES - Faulty multiplex integrated control unit.

NO - Refer to the multiplex integrated control unit input test MICU Input Test and correct the cause.