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DTC B1825: Power Seat Slide Motor Pulse Error ('06 model)

NOTE:
  • 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 (see TROUBLESHOOTING - 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 beset.
  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 be set.

    Does the slide motor run smoothly? 

    YES  - Go to step 8.

    NO  - Go to step  17.

  8. Turn the ignition switch OFF.
  9. Disconnect 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.
    Fig 1: Checking Continuity Between Power Seat Control Unit Connector A (40P) No. 11 And No. 29 Terminals
    G05489097Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Go to step 12.

    NO  - Repair open in the wire.

  12. Check for continuity between power seat control unit connector A (40P) No. 11 terminal and body ground.
    Fig 2: Checking Continuity Between Power Seat Control Unit Connector A (40P) No. 11 Terminal And Body Ground
    G05489098Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Repair short in the wire.

    NO  - Go to step 13.

  13. Reconnect power seat control unit connector A (40P).
  14. Turn the ignition switch ON (II).
  15. Measure the voltage between the slide position sensor 3P connector No. 3 and No. 2 terminals.
    Fig 3: Measuring Voltage Between Slide Position Sensor 3P Connector No. 3 And No. 2 Terminals
    G05489099Courtesy of AMERICAN HONDA MOTOR CO., INC.

    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 power seat control unit connector A (40P) No. 15 and No. 29 terminals.
    Fig 4: Measuring Voltage Between Power Seat Control Unit Connector A (40P) No. 15 And No. 29 Terminals
    G05489100Courtesy of AMERICAN HONDA MOTOR CO., INC.

    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 power seat control unit connector B (18P).
  19. Disconnect the slide motor 2P connector.
  20. Check for continuity between power seat control unit connector B (18P) No. 7 and No. 17 terminals and slide motor 2P connector No. 1 and No. 2 terminals.
    Fig 5: Checking Continuity Between Power Seat Control Unit Connector B (18P) No. 7 And No. 17 Terminals
    G05489101Courtesy of AMERICAN HONDA MOTOR CO., INC.

    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.
    Fig 6: Checking Continuity Between Slide Motor 2P Connector No. 1 And No. 2 Terminals And Body Ground
    G05489102Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Repair short in the wire to body ground.

    NO  - Go to step 22.

  22. Perform the slide motor test (see DRIVER'S POWER SEAT 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.

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