( TL19E00K773000Y1846FAAT00 )

DTC Troubleshooting: B1846

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

1. Clear the DTCs with the HDS.

1. Turn the ignition switch to LOCK (0) and then back to ON (II).

1. Operate the front up-down switch in each direction for more than 1 second.

1. 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.■

1. Turn the ignition switch to LOCK (0).

1. Disconnect power seat control unit connector A (40P).

1. Disconnect the power seat adjustment switch 12P connector.

1. 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 a short to ground in the wire.■
NO | - | Go to Step 9 .

1. Check for continuity between these power seat control unit connector A (40P) terminals:
   - No. 1 and No. 4
   - No. 1 and No. 5
   - No. 4 and No. 5

Is there continuity?

YES | - | Repair a short in the wire.■
NO | - | Go to Step 10 .

1. Test the power seat adjustment switch.

Is the switch OK?

YES | - | Replace the power seat control unit .■
NO | - | Replace the power seat adjustment switch.■