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 (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Clear the DTCs with the HDS.
Turn the ignition switch to LOCK (0), and then back to ON (II).
Operate the slide switch in each direction for more than 1 second.
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. ■
Turn the ignition switch to LOCK (0).
Disconnect power seat control unit connector B (40P).
Disconnect the power seat adjustment switch 12P connector.
Check for continuity between body ground and power seat control unit connector B (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.

Fig 1: Checking Continuity Between Body Ground & Power Seat Control Unit Connector B (40P) Terminals 1, 7 & 24
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between these power seat control unit connector B (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.

Fig 2: Checking Continuity Between Power Seat Control Unit Connector B (40P) Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Test the power seat adjustment switch (see POWER SEAT ADJUSTMENT SWITCH TEST/REPLACEMENT ).
Is the switch OK?

YES - Replace the power seat control unit (see Power Seat Control Unit Input Test/Replacement ). ■

NO - Replace the power seat adjustment switch (see Power Seat Adjustment Switch Test/Replacement ). ■