LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Acura >> 2013 >> TL Base >> Repair and Diagnosis >> Body & Frame >> Seats >> Driver Position Memory System >> DTC Troubleshooting >> DTC B1825: Power Seat Slide Motor Pulse Error
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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 (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
  1. Clear the DTCs with the HDS.
  2. Turn the ignition switch to LOCK (0) and then back to ON (II), or press the engine start/stop button to select the OFF mode and then the ON mode.
  3. Operate the power seat adjustment switch for several seconds in each direction.
    NOTE: DTC B1825 is stored when the slide switch is operated more than 1 second after the seat moves to the most forward or backward position, even when the system is OK.
  4. Check for DTCs with the HDS.

    Is DTC B1825 indicated? 

    YES  -Go to step 5.

    NO  -Intermittent failure, the system is OK at this time. Check for loose or poor connections.

  5. Clear the DTCs with the HDS.

    Is DTC B1836 also indicated? 

    YES  -Go to the DTC B1836 TROUBLESHOOTING ).

    NO  -Go to step 6.

  6. Clear the 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 to ON (II), or press the engine start/stop button to select the OFF mode and then the ON mode.
  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  24.

  9. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  10. Disconnect power seat control unit connector B (40P).
  11. Disconnect the slide motor/position sensor 5P connector.
  12. Check for continuity between power seat control unit connector B (40P) terminals No. 29 and No. 11 and slide motor/position sensor 5P connector terminals No. 3 and No. 4 respectively.
    Fig 1: Checking Continuity Between Power Seat Control Unit Connector B (40P) Terminals No. 29 And No. 11
    G08067532Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 13.

    NO  -Repair an open or high resistance in the wire.

  13. Check for continuity between body ground and power seat control unit connector B (40P) terminal No. 11.
    Fig 2: Checking Continuity Between Body Ground And Power Seat Control Unit Connector B (40P) Terminal No. 11
    G08067533Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to ground in the wire.

    NO  -Go to step 14.

  14. Reconnect power seat control unit connector B (40P).
  15. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  16. Measure the voltage between slide motor/position sensor 5P connector terminals No. 4 (+) and No. 3 (-).
    Fig 3: Measuring Voltage Between Slide Motor/Position Sensor 5P Connector Terminals No. 4 (+) And No. 3 (-)
    G08067534Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Replace the slide motor/position sensor (see FRONT SEAT SLIDE MOTOR REPLACEMENT ).

    NO  -If there is no voltage, replace the power seat control unit (see POWER SEAT CONTROL UNIT INPUT TEST/REPLACEMENT  ). If there is battery voltage, repair a short in the wire (sensor line).

  17. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  18. Disconnect power seat control unit connector B (40P).
  19. Disconnect the slide motor/position sensor 5P connector.
  20. Check for continuity between power seat control unit connector B (40P) terminals No. 15 and No. 29 and slide motor/position sensor 5P connector terminals No. 2 and No. 3 respectively.
    Fig 4: Checking Continuity Between Power Seat Control Unit Connector B (40P) Terminals No. 15 And No. 29
    G08067535Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 21.

    NO  -Repair an open or high resistance in the wire.

  21. Reconnect power seat control unit connector B (40P).
  22. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  23. Measure the voltage between power seat control unit connector B (40P) terminals No. 15 and No. 29.
    Fig 5: Measuring Voltage Between Power Seat Control Unit Connector B (40P) Terminals No. 15 And No. 29
    G08067536Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage when the slide switch is operated? 

    YES  -Replace the slide motor/position sensor (see FRONT SEAT SLIDE MOTOR REPLACEMENT ).

    NO  -Replace the power seat control unit (see POWER SEAT CONTROL UNIT INPUT TEST/REPLACEMENT  ).

  24. Check the No. 19 (20 A) fuse in the driver's under-dash fuse/relay box.

    Is the fuse OK? 

    YES  -Go to step 25.

    NO  -Replace the fuse. If the fuse blows again, repair the short to ground on the No. 19 (20 A) fuse circuit.

  25. Measure the voltage between body ground and power seat control unit connector A (18P) terminal No. 8.
    Fig 6: Measuring Voltage Between Body Ground And Power Seat Control Unit Connector A (18P) Terminal No. 8
    G08067537Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step 26.

    NO  -Repair an open or high resistance in the wire between the driver's under-dash fuse/relay box and the power seat control unit.

  26. Measure the voltage between body ground at power seat control unit connector A (18P) terminal No. 18 when operating the slide switch.
    Fig 7: Measuring Voltage Between Body Ground At Power Seat Control Unit Connector A (18P) Terminal No. 18
    G08067538Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there 0.2 V or more? 

    YES  -Repair an open or high resistance in the wire between the power seat control unit and body ground (G701).

    NO  -Go to step 27.

  27. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  28. Disconnect power seat control unit connector A (18P).
  29. Disconnect the slide motor/position sensor 5P connector.
  30. Check for continuity between power seat control unit connector A (18P) terminals No. 17 and No. 7 and slide motor/position sensor 5P connector terminals No. 1 and No. 5 respectively.
    Fig 8: Checking Continuity Between Power Seat Control Unit Connector A (18P) Terminals No. 17 And No. 7
    G08067539Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 31.

    NO  -Repair an open or high resistance in the wire.

  31. Check for continuity between body ground and slide motor/position sensor 5P connector terminals No. 1 and No. 5 individually.
    Fig 9: Checking Continuity Between Body Ground And Slide Motor/Position Sensor 5P Connector Terminals No. 1 And No. 5
    G08067540Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to ground in the wire.

    NO  -Go to step 32.

  32. Test the slide motor (see DRIVER'S POWER SEAT MOTOR TEST  ).

    Is the motor OK? 

    YES  -Replace the power seat control unit (see POWER SEAT CONTROL UNIT INPUT TEST/REPLACEMENT  ).

    NO  -Replace the slide motor/position sensor (see FRONT SEAT SLIDE MOTOR REPLACEMENT ).

scientia non olet · About LEMON Manuals