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 ).
- Make sure you have the latest software on the HDS before troubleshooting.
- Clear the DTCs with the HDS.
- Turn the ignition switch OFF, and then back to ON (II).
- Operate the slide switch in each direction.NOTE: Do not hold the switch for more than 1 second after the seat reaches a position limit or a DTC will beset.
- Check for DTCs with the HDS.
Is DTC B1836 indicated?
YES - Go to step 5.
NO - Intermittent failure. The driving position memory system is OK at this time. Check for loose or poor connections and terminal fit at the power seat control unit connector. Check the battery condition, battery cable connections, and ground G601.
- Turn the ignition switch OFF.
- Disconnect power seat control unit connector A (40P).
- Disconnect the slide position sensor 3P connector and the 5P connectors from the recline motor/position sensor, front up-down motor/position sensor, and rear up-down motor/position sensor.
- Check for continuity between power seat control unit connector A (40P) No. 15 terminal and body ground.Fig 1: Checking Continuity Between Power Seat Control Unit Connector A (40P) No. 15 Terminal And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES - Repair short in the wire to body ground.
NO - Go to step 9.
- At the sensor, check for continuity between the No. 3 terminal of each position sensor and body ground (motor body).
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 3: Checking Continuity Between Front Up-Down/Rear Up-Down Position Sensor Connecotr (5P) And Recline Position Sensor Connector (5P)Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES - Replace the motor/position sensor that has an internal short to ground.
NO - Replace the power seat control unit.