B1846

DTC B1846: Power Seat Front Up-Down Switch Circuit Malfunction

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. Operate the front up-down switch in each direction for more than 1 second.
4. Check for DTCs with the HDS.

Is DTC B1846 indicated?

YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections.

5. Turn the ignition switch OFF.
6. Disconnect power seat control unit connector A (40P).
7. Disconnect the power seat adjustment switch 12P connector.




8. Check for continuity between body ground and power seat control unit connector A (40P) terminals No. 1, No. 4, and No. 5 individually.

Is there continuity?

YES - Repair short in the wire.

NO - Go to step 9.




9. Check for continuity between these power seat control unit connector A (40P) terminals:

Is there continuity?

YES - Repair short in the wire.

NO - Go to step 10.

10. Test the power seat adjustment switch.

Is the switch OK?

YES - Replace the power seat control unit.

NO - Replace the power seat adjustment switch.