B1836

DTC Troubleshooting: 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. Troubleshooting - B-CAN System Diagnosis Test Mode A

1. Clear the DTC with the HDS.

2. Turn the ignition switch to LOCK (0) and then back ON (II).

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

4. 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 at the power sear control unit connectors.


5. Turn the ignition switch to LOCK (0).

6. Disconnect power seat control unit connector A (40P).

7. Disconnect the 4P connectors from the slide position sensor, the front up-down position sensor, and the rear up-down position sensor, and disconnect the 8P connector from the recline motor/lumbar support motor subharness.

8. Check for continuity between the power seat control unit connector A (40P) terminal No. 15 and body ground.

Is there continuity?
YES - Repair short to ground in the wire.

NO - Go to step 9.






9. Check for continuity between body ground (motor body) and the terminal No. 1 of the slide position sensor, the front up-down position sensor, and the rear up-down position sensor.

Is there continuity?
YES - Replace the motor/position sensor that has continuity.

NO - Go to step 10.






10. Check for continuity between body ground (seat frame) and the terminal No. 8 of the recline motor/lumbar support motor subharness 8P connector.

Is there continuity?
YES - Check for a short to ground in the wire of the recline motor/lumbar support motor subharness. If the harness is bad, repair it, if the harness is OK, replace the recline motor/position sensor.

NO - Replace the power seat control unit.