DTC Troubleshooting: B1844
DTC B1844:
 Power Seat Slide 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 slide switch in each direction for more than 1 second.
  1. Check for DTCs with the HDS.
Is DTC B1844 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. 7, and No. 24 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. 7
    • No. 1 and No. 24
    • No. 7 and No. 24
Is there continuity?
YES -
Repair a short in the wire.■
NO -
Go to Step 10 .
Is the switch OK?
YES -
Replace the power seat control unit .■
NO -
Replace the power seat adjustment switch.■