B1825

DTC Troubleshooting: B1825

DTC B1825: Power Seat Slide Motor Pulse Error

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

DTC B1825 is stored when the slide switch is operated more than 1 second after the seat slides to the most forward or most backward position even when the system is OK.

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

2. Clear the DTCs with the HDS.

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

4. Check for DTCs with the HDS.

Is DTC B1825 indicated?
YES - Go to step 5.

NO - Intermittent failure, the slide position sensor is OK at this time. Check for loose or poor connections at the power seat control unit connector.


5. Check for DTCs with the HDS.

Is DTC B1836 also indicated?
YES - Troubleshoot DTC B1836 first.

NO - Go to step 6.


6. Check for DTCs with the HDS.

Are DTCs B1826, B1827 and/or B1828 also indicated?
YES - Go to step 17.

NO - Go to step 7.


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

8. Operate the slide switch for 2 seconds, and check the slide motor operation.

Does the slide motor run smoothly?
YES - Go to step 9.

NO - Go to step 26.


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

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

11. Disconnect the slide position sensor 4P connector.

12. Check for continuity between the power seat control unit connector A (40P) terminals No. 11 and No. 29 and the slide position sensor 4P connector terminals No. 2 and No. 3 respectively.

Is there continuity?
YES - Go to step 13.

NO - Repair open in the wire.






13. Check for continuity between body ground and the power seat control unit connector A (40P) terminal No. 11.

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

NO - Go to step 14.






14. Reconnect power seat control unit connector A (40P).

15. Turn the ignition switch to ON (II).

16. Measure the voltage between the slide position sensor 4P connector terminals No. 2 (+) and No. 3 (-).

Is there about 5 V?
YES - Faulty slide position sensor, replace the slide motor.

NO - If there is no voltage, replace the power seat control unit. If there is battery voltage, repair a short in the wire (sensor line).






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

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

19. Disconnect the slide position sensor 4P connector.

20. Check for continuity between the power seat control unit connector A (40P) terminals No. 15 and No. 29 and the slide position sensor 4P connector terminals No. 1 and No. 3 respectively.

Is there continuity?
YES - Go to step 21.

NO - Repair open in the wire.






21. Disconnect the 4P connector from the front up-down position sensor and the rear up-down position sensor, then disconnect the recline motor/lumbar support motor 8P connector.

22. Check for continuity between body ground and the slide position sensor 4P connector terminal No. 1.

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

NO - Go to step 23.






23. Reconnect power seat control unit connector A (40P).

24. Turn the ignition switch to ON (II).

25. Measure the voltage between the power seat control unit connector A (40P) terminals No. 15 and No. 29.

Is there battery voltage when the slide switch is operated?
YES - Replace the slide motor/position sensor.

NO - Replace the power seat control unit.






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

27. Disconnect power seat control unit connector B (18P).

28. Disconnect the slide motor 2P connector.

29. Check for continuity between the power seat control unit connector B (18P) terminals No. 7 and No. 17 and the slide motor 2P connector terminals No. 1 and No. 2 respectively.

Is there continuity?
YES - Go to step 30.

NO - Repair open in the wire.






30. Check for continuity between body ground and the slide motor 2P connector terminals No. 1 and No. 2 individually.

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

NO - Go to step 31.






31. Test the slide motor. Driver's Power Seat Motor Test

Is the motor OK?
YES - Replace the power seat control unit.

NO - Replace the slide motor/position sensor.