DTC B1836

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 .

DTC (Power Seat Control Unit)

1. Problem verification

   -1. Clear the DTCs with the HDS.

   -2. Press the power 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 (VCC 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 5P connector Front up-down motor/position sensor 6P connector Rear up-down motor/position sensor 6P connector Recline motor/position sensor 6P connector

   -3. Measure the resistance between test points 1 and 2.

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

   Is there 1.0 MΩ or more?

   YES 

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

   NO 

   Repair a short to ground in the wire.

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

   -1. Measure the resistance between test points 1 and 2.

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

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

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

   Test point 1	Recline motor/position sensor 6P connector (male terminals) No. 1:
   Test point 2	Body ground (motor body)

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

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

   Is there 1.0 Ω or less?

   Slide motor/position sensor is shorted

   Faulty slide motor/position sensor; replace the seat frame assembly .

   Front up-down motor/position sensor is shorted

   Faulty front up-down motor/position sensor; replace the seat frame assembly .

   Rear up-down motor/position sensor is shorted

   Faulty rear up-down motor/position sensor; replace the seat frame assembly .

   Recline motor/position sensor is shorted

   Faulty recline motor/position sensor; replace the seat frame assembly .

   NO 

   Replace the power seat control unit .