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DTC B1825: Power Seat Slide Motor Pulse Error

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 Honda Crosstour, 2014 Honda Crosstour, 2013 Honda Crosstour, 2012 Honda Crosstour, and 2011 Honda Accord Crosstour. However, it is still accessible from the selected car via links, so may be relevant.
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).
  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 the DTCs with the HDS.

    Is DTC B1825 indicated? 

    YES  -Go to next step.

    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 next step.

  6. Clear the DTCs with the HDS.

    Are DTCs B1826, B1827, and/or B1828 also indicated? 

    YES  -Go to step  17.

    NO  -Go to next step.

  7. Turn the ignition switch to LOCK (0) and then back to 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 next step.

    NO  -Go to step  26.

  9. Turn the ignition switch to LOCK (0).
  10. Disconnect power seat control unit connector B (40P).
  11. Disconnect the slide motor/position sensor 6P connector.
  12. Check for continuity between power seat control unit connector B (40P) terminals No. 10 and No. 32 and slide motor/position sensor 6P connector terminals No. 2 and No. 6 respectively.
    Fig 1: Checking Continuity Between Connector B (40P) Terminals No. 10 And No. 32 And Slide Motor/Position Sensor 6P Connector Terminals No. 2 And No. 6
    G06420505Courtesy of ABLE BODY CORP.

    Is there continuity? 

    YES  -Go to next step.

    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. 10.
    Fig 2: Checking Continuity Between Body Ground And Power Seat Control Unit Connector B (40P) Terminal No. 10
    G06420506Courtesy of ABLE BODY CORP.

    Is there continuity? 

    YES  -Repair a short to ground in the wire.

    NO  -Go to next step.

  14. Reconnect power seat control unit connector B (40P).
  15. Turn the ignition switch to ON (II).
  16. Measure the voltage between slide motor/position sensor 6P connector terminals No. 2 (+) and No. 6 (-).
    Fig 3: Measuring Voltage Between Slide Motor/Position Sensor 6P Connector Terminals No. 2 (+) And No. 6 (-)
    G06420507Courtesy of ABLE BODY CORP.

    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. 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 B (40P).
  19. Disconnect the slide motor/position sensor 6P connector.
  20. Check for continuity between power seat control unit connector B (40P) terminals No. 6 and No. 32 and slide motor/position sensor 6P connector terminals No. 5 and No. 6 respectively.
    Fig 4: Checking Continuity Between Power Seat Control Unit Connector B (40P) Terminals And Slide Motor/Position Sensor 6P Connector Terminals
    G06420508Courtesy of ABLE BODY CORP.

    Is there continuity? 

    YES  -Go to next step.

    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).
  23. Measure the voltage between power seat control unit connector B (40P) terminals No. 6 and No. 32.
    Fig 5: Checking Continuity Between Body Ground And Slide Motor/Position Sensor 6P Connector Terminal No. 5
    G06420509Courtesy of ABLE BODY CORP.

    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. Turn the ignition switch to LOCK (0).
  25. Check the No.B19 (20A) fuse in the driver's under-dash fuse/relay box.

    Is the fuse OK? 

    YES  -Go to next step.

    NO  -Replace the fuse. If the fuse blows again, repair the short to ground on the No. B19 (20A) fuse crcuit.

  26. Turn the ignition switch to ON (II).
  27. Measure the voltage to body ground between body ground and power seat control unit connector A (18P) terminals No. 1.
    Fig 6: Measuring Voltage Between Power Seat Control Unit Connector B (40P) Terminals No. 6 And No. 32
    G06420510Courtesy of ABLE BODY CORP.

    Is there battery voltage? 

    YES  -Go to next step.

    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.

  28. Measure the voltage to body ground at power seat control unit connector A (18P) terminal No. 9 when the slide switch is operated.
    Fig 7: Measuring Voltage Between Slide Switch And Terminals A9, A5 And Body Ground
    G06420511Courtesy of ABLE BODY CORP.

    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 (G801).

    NO  -Go to next step.

  29. Turn the ignition switch to LOCK (0).
  30. Disconnect power seat control unit connector A (18P).
  31. Disconnect the slide motor/position sensor 6P connector.
  32. Check for continuity between power seat control unit connector A (18P) terminals No. 10 and No. 2 and slide motor/position sensor 6P connector terminals No. 3 and No. 4 respectively.
    Fig 8: Checking Continuity Between Power Seat Control Unit Connector A (18P) And Slide Motor/Position Sensor 6P Connector
    G06420512Courtesy of ABLE BODY CORP.

    Is there continuity? 

    YES  -Go to next step.

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

  33. Check for continuity between body ground and slide motor/position sensor 6P connector terminals No. 3 and No. 4 individually.
    Fig 9: Checking Continuity Between Body Ground And Slide Motor/Position Sensor 6P Connector Terminals No. 3 And No. 4
    G06420513Courtesy of ABLE BODY CORP.

    Is there continuity? 

    YES  -Repair a short to ground in the wire(s).

    NO  -Go to next step.

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

    Is there continuity? 

    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 ).

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