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DTC B1825: Slide Pulse Error (No Change in Pulse for 1 Second)

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 most rearward 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 (see DTC B1836: POWER SEAT POSITION SENSOR CIRCUIT SHORT ).

    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).
  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).
  10. Disconnect power seat control unit connector A (40P).
  11. Disconnect the slide motor/position sensor 5P connector.
  12. Check for continuity between power seat control unit connector A (40P) terminals No. 29 and No. 31 and slide motor/position sensor 5P connector terminals No. 3 and No. 4 respectively.
    Fig 1: Checking Continuity Between Power Seat Control Unit Connector A (40P) Terminals No. 29, 31 And Slide Motor/Position Sensor 5P Connector Terminals No. 3, 4
    G06946893Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  13.

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

  13. Check for continuity between body ground and power seat control unit connector A (40P) terminal No. 31.
    Fig 2: Checking Continuity Between Body Ground And Power Seat Control Unit Connector A (40P) Terminal No. 31
    G06946894Courtesy 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 A (40P).
  15. Turn the ignition switch to ON (II).
  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 (-)
    G06946895Courtesy 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).
  18. Disconnect power seat control unit connector A (40P).
  19. Disconnect the slide motor/position sensor 5P connector.
  20. Check for continuity between power seat control unit connector A (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 A (40P) Terminals No. 15, 29 And Slide Motor/Position Sensor 5P Connector Terminals No. 2.. 3
    G06946896Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  21.

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

  21. Reconnect power seat control unit connector A (40P).
  22. Turn the ignition switch to ON (II).
  23. Measure the voltage between power seat control unit connector A (40P) terminals No. 15 and No. 29.
    Fig 5: Measuring Voltage Between Power Seat Control Unit Connector A (40P) Terminals No. 15 And No. 29
    G06946898Courtesy 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. Turn the ignition switch to LOCK (0).
  25. Check the No. 19 (20 A) fuse in the driver's under-dash fuse/relay box.

    Is the fuse OK? 

    YES  -Go to step  26.

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

  26. Turn the ignition switch to ON (II).
  27. Measure the voltage between body ground and power seat control unit connector B (18P) terminal No. 8.
    Fig 6: Measuring Voltage Between Body Ground & Power Seat Control Unit Connector B (18P) Terminal No. 8
    G00522902Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there less than 0.2 V? 

    YES  -Go to step  28.

    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 between body ground and power seat control unit connector B (18P) terminal No. 18, when the slide switch is operated.
    Fig 7: Measuring Voltage Between Body Ground And Power Seat Control Unit Connector B (18P) Terminal No. 18
    G06946899Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there less than 0.2 V? 

    YES  -Go to step  29.

    NO  -Repair an open or high resistance in the ground wire or poor ground (G701).

  29. Turn the ignition switch to LOCK (0).
  30. Disconnect power seat control unit connector B (18P).
  31. Disconnect the slide motor/position sensor 5P connector.
  32. Check for continuity between power seat control unit connector B(18P) terminals No. 7 and No. 17 and slide motor/position sensor 5P connector terminals No. 1 and No. 5 respectively.
    Fig 8: Checking Continuity Between Power Seat Control Unit Connector B(18P) Terminals No. 7, 17 And Slide Motor/Position Sensor 5P Connector Terminals No. 1, 5
    G06946900Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  33.

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

  33. 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 5
    G06946901Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to ground in the wire.

    NO  -Go to step  34.

  34. 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 ).

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