B1825
DTC B1825: Power Seat Slide Motor Pulse ErrorNOTE:
- Make sure you have the latest software on the HDS before troubleshooting.
- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
- DTC B1825 can be set and stored when the slide switch is operated for more than 1 second after the seat reaches the fully forward or rearward positions, even if the system is OK.
1. Turn the ignition switch OFF, and then back ON (II).
2. Clear the DTCs with the HDS.
3. Operate the power seat adjustment switch in all directions.
NOTE: Do not hold the switch for more than 1 second after the seat reaches a position limit or a DTC will be set.
4. Check for DTCs with the HDS.
Is DTC B1825 indicated?
YES - Go to step 5.
NO - Intermittent failure. The slide motor/position sensor is OK at this time. Check for loose or poor connections and pin fit at the power seat control unit connector. Check the battery condition, battery cable connections, and ground G601
5. Check for DTCs with the HDS.
Is DTC B1836 also indicated?
YES - Go to DTC B1836 troubleshooting.
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 16.
NO - Go to step 7.
7. Operate the slide switch and check the slide motor operation.
NOTE: Do not hold the switch for more than 1 second after the seat reaches a position limit or a DTC will beset.
Does the slide motor run smoothly?
YES - Go to step 8.
NO - Go to step 17.
8. Turn the ignition switch OFF.
9. Disconnect the power seat control unit connector A (40P).
10. Disconnect the slide position sensor 3P connector.
11. Check for continuity between the power seat control unit connector A (40P) No. 11 and No. 29 terminals and slide position sensor 3P connector No. 1 and No. 2 terminals.
Is there continuity?
YES - Go to step 12.
NO - Repair open in the wire.
12. Check for continuity between the power seat control unit connector A (40P) No. 11 terminal and body ground.
Is there continuity?
YES - Repair short in the wire
NO - Go to step 13.
13. Reconnect the power seat control unit connector A (40P).
14. Turn the ignition switch ON (II).
15. Measure voltage between the slide position sensor 3P connector No. 3 and No. 2 terminals.
Is there about 10 V?
YES - Faulty slide position sensor, replace the slide motor assembly.
NO - Check for open in the WHT/BLK wire between slide position sensor 3P connector No. 3 terminal and power seat control unit connector A (40P) No. 15 terminal. If it is OK, substitute a known-good power seat control unit. If the problem is still present, substitute a known-good slide motor assembly (known-good seat assembly). If the problem is repaired, replace the power seat control unit, or slide motor assembly.
16. Measure the voltage between the power seat control unit connector A (40P) No. 15 and No. 29 terminals.
Is there about 10 V when the slide switch is operated?
YES - Faulty slide position sensor, replace the slide motor assembly.
NO - Replace the power seat control unit.
17. Turn the ignition switch OFF.
18. Disconnect the power seat control unit connector B (18P).
19. Disconnect the slide motor 2P connector.
20. Check for continuity between the power seat control unit connector B (18P) No. 7 and 17 terminals and slide motor 2P connector No. 1 and No .2 terminals.
Is there continuity?
YES - Go to step 21.
NO - Repair open in the wire.
21. Check for continuity between the slide motor 2P connector No. 1 and No. 2 terminals and body ground.
Is there continuity?
YES - Repair short in the wire to body ground.
NO - Go to step 22.
22. Perform the slide motor test.
Is the motor OK?
YES - Check the terminal fit. If they are OK, replace the power seat control unit
NO - Check the terminal fit. If they are OK, replace the slide motor assembly.