B1844

DTC Troubleshooting: B1844

DTC B1844:

Power Seat Slide 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).

3. Operate the slide switch in each direction for at least 2 seconds.

4. Check for DTCs with the HDS.

Is DTC B1844 indicated?

YES -

Go to step 5.

NO -

Intermittent failure. The driving position memory system is OK at this time. Check for loose or poor connections at the power seat control unit connector.�

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

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

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

8. Check for continuity between power seat control unit connector A (40P) terminals No. 1, No. 7, No. 27 and body ground individually.





Is there continuity?

YES -

Repair a short to ground in the wire.�

NO -

Go to step 9.

9. Check for continuity between the following terminals of power seat control unit connector A (40P).









Is there continuity?

YES -

Repair a short in the wire(s).�

NO -

Go to step 10.

10. Do the power seat adjustment switch test Driver's Power Seat Adjustment Switch Test/Replacement.

Is the switch OK?

YES -

Replace the power seat control unit.�

NO -

Replace the power seat adjustment switch.�