B1846

DTC Troubleshooting: 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 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 to ON (II), or press the engine start/stop button to select the OFF mode and then the ON mode.

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 to LOCK (0), or press the engine start/stop button to select the OFF mode.

6. Disconnect power seat control unit connector B (40P).

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

8. Check for continuity between body ground and power seat control unit connector B (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.

9. Check for continuity between these power seat control unit connector B (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.

10. Test the power seat adjustment switch Power Seat Adjustment Switch Test/Replacement (With Driving Position Memory System (DPMS)).

Is the switch OK?

YES -

Replace the power seat control unit Power Seat Control Unit Input Test/Replacement.�

NO -

Replace the power seat adjustment switch Power Seat Adjustment Switch Test/Replacement (With Driving Position Memory System (DPMS)).�