DTC Troubleshooting: B1846
  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.■