DTC : B1836

DTC B1836  : Power seat position sensor circuit short

DTC (Power Seat Control Unit)

NOTE:  If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Go to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .

1. Problem verification

   - 1. Clear the DTCs with the HDS.

   Clear DTCs

   - 2. Press the engine start/stop switch at least twenty times, then wait for at least 20 seconds.

   - 3. Operate the power seat adjustment switch in all directions for more than 1 second each.

   - 4. Check for DTCs with the HDS.

   DTC Description	DTC
   B1836 Power seat position sensor circuit short

   Is DTC B1836 indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for loose or poor connections.

2. Shorted wire check (SVCC line)

   - 1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connectors.

   Power seat control unit connector A (20P) Slide motor/position sensor 6P connector Front up-down motor/position sensor 6P connector Rear up-down motor/position sensor 6P connector Recline motor/position sensor 5P connector

   - 3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode Power seat control unit connector A (20P): disconnected Slide motor/position sensor 6P connector: disconnected Front up-down motor/position sensor 6P connector: disconnected Rear up-down motor/position sensor 6P connector: disconnected Recline motor/position sensor 5P connector: disconnected
   Test point 1	Power seat control unit connector A (20P) No. 6
   Test point 2	Body ground

   Is there continuity?

   YES 

   Repair a short to ground in the wire.

   NO 

   The SVCC wire is not shorted. Go to step 3.

3. Motor check (Slide, Front up-down, Rear up-down, Recline)

   - 1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode Power seat control unit connector A (20P): disconnected Slide motor/position sensor 6P connector: disconnected Front up-down motor/position sensor 6P connector: disconnected Rear up-down motor/position sensor 6P connector: disconnected Recline motor/position sensor 5P connector: disconnected
   Test point 1	Slide motor/position sensor 6P connector No. 5
   Test point 2	Body ground (motor body)

   Test point 1	Front up-down motor/position sensor 6P connector No. 5
   Test point 2	Body ground (motor body)

   Test point 1	Rear up-down motor/position sensor 6P connector No. 5
   Test point 2	Body ground (motor body)

   Test point 1	Recline motor/position sensor 5P connector No. 5
   Test point 2	Body ground (motor body)

   Courtesy of HONDA, U.S.A., INC.

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   Slide motor/position sensor is shorted

   Faulty slide motor/position sensor; replace the Front Seat Frame - Removal and Installation .

   Front up-down motor/position sensor is shorted

   Faulty front up-down motor/position sensor; replace the Front Seat Frame - Removal and Installation .

   Rear up-down motor/position sensor is shorted

   Faulty rear up-down motor/position sensor; replace the Front Seat Frame - Removal and Installation .

   Recline motor/position sensor is shorted

   Faulty recline motor/position sensor; replace the Front Seat Frame - Removal and Installation .

   NO 

   Replace the Power Seat Control Unit - Removal and Installation .