DTC B1836: Power Seat Position Sensor Circuit Short

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), or press the engine start/stop button to select the OFF mode and then the ON mode.
Operate the power seat adjustment switch in all directions for more than 1 second each.
Check for DTCs with the HDS.
Is DTC B1836 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), or press the engine start/stop button to select the OFF mode.
Disconnect power seat control unit connector B (40P).
Disconnect the 5P connector from each motor.
Check for continuity between body ground and power seat control unit connector B (40P) terminal No. 15.

Fig 1: Checking Continuity Between Body Ground And Power Seat Control Unit Connector B (40P) Terminal No. 15
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair a short to ground in the wire.

NO -Go to step 9.
Check for continuity between slide motor/position sensor terminal No. 2 and the motor body.

Fig 2: Checking Continuity Between Slide Motor/Position Sensor Terminal No. 2 And Motor Body
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Replace the slide motor/position sensor (see FRONT SEAT SLIDE MOTOR REPLACEMENT ).

NO -Go to step 10.
Check for continuity between front up-down motor/position sensor, rear up-down motor/position sensor, and recline motor/position sensor terminal No. 3 and motor body.

Fig 3: Checking Continuity Between Front And Rear Up-Down Motor/Position Sensor And Recline Motor/Position Sensor And Motor Body
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -If the front or rear up-down motor/position sensor is faulty, replace the seat frame assembly (see FRONT SEAT FRAME REPLACEMENT ). If the recline motor/position sensor is faulty, replace the recline motor/position sensor (see FRONT SEAT RECLINE MOTOR REPLACEMENT ).

NO -Replace the power seat control unit (see POWER SEAT CONTROL UNIT INPUT TEST/REPLACEMENT ).