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).
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).
Disconnect power seat control unit connector A (40P).
Disconnect the 5P connector from each motor.
Check for continuity between body ground and power seat control unit connector A (40P) terminal No. 15.

Fig 1: Checking Continuity Between Body Ground And Power Seat Control Unit Connector A (40P) Terminal No. 15

Is there continuity?

YES -Repair a short to ground in the wire.

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

Fig 2: Checking Continuity Between Body Ground (Motor Body) And Terminal No. 2 Of Slide Motor

Is there continuity?

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

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

Fig 3: Checking Continuity Between Body Ground And Terminal No. 3 Of Front Up-Down Motor

Is there continuity?

YES -If the front or rear up-down motor/position sensor is faulty, replace the faulty front up-down motor/position sensor (see FRONT SEAT UP-DOWN MOTOR REPLACEMENT ), rear up-down motor/position sensor (see REAR UP-DOWN MOTOR - DRIVER'S SEAT ). If the recline motor/position sensor is faulty, replace the recline motor/position sensor.

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