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Home >> Acura >> 2014 >> TSX V6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 78 (Driver Position Memory System (DPMS) (4-CYL)) >> DTC Troubleshooting >> DTC B1825: Power Seat Slide Motor Pulse Error
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DTC B1825: Power Seat Slide Motor Pulse Error

WARNING: This page is about a different variant/trim than selected.
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 And No. 31
    G07771034Courtesy 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 A (40P) terminal No. 31.

    POWER SEAT CONTROL UNIT CONNECTOR A (40P) 

    Fig 2: Checking Continuity Between Body Ground And Power Seat Control Unit Connector A (40P) Terminal No. 31
    G07771035Courtesy 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 (-).

    SLIDE MOTOR/POSITION SENSOR 5P CONNECTOR 

    Fig 3: Measuring Voltage Between Slide Motor/Position Sensor 5P Connector Terminals No. 4 And No. 3
    G07771036Courtesy 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. 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 And No. 29 And Slide Motor/Position Sensor 5P Connector Terminals No. 2 And No. 3
    G07771037Courtesy 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 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
    G07771039Courtesy 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.

    POWER SEAT CONTROL UNIT CONNECTOR B (18P) 

    Fig 6: Measuring Voltage Between Body Ground And Power Seat Control Unit Connector B (18P) Terminal No. 8
    G00520148Courtesy 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.

    POWER SEAT CONTROL UNIT CONNECTOR B (18P) 

    Fig 7: Measuring Voltage Between Body Ground And Power Seat Control Unit Connector B (18P) Terminal No. 18
    G07771040Courtesy 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 And No. 17 And Slide Motor/Position Sensor 5P Connector Terminals No. 1 And No. 5
    G07771041Courtesy 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 No. 5
    G07771042Courtesy of AMERICAN HONDA MOTOR CO., INC.

    SLIDE MOTOR/POSITION SENSOR 5P CONNECTOR 

    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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