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Home >> Acura >> 2011 >> RDX 2.3 TB2 >> Repair and Diagnosis >> Body & Frame >> Seats >> Driver Position Memory System (DPMS) >> DTC Troubleshooting >> DTC B1828: Driver Seat Recline Motor Pulse Error
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DTC B1828: Driver Seat Recline 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).
  3. Operate the power seat adjustment switch in all directions for more than 2 seconds each.
    NOTE: DTC B1828 is stored when the recline switch is operated more than 1 second after the seat back recline to the most forward or most rearward position, even when the system is OK.
  4. Check for the DTCs with the HDS.

    Is DTC B1828 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 B1825, B1826, and/or B1827 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 recline switch for 2 seconds, and check the recline motor operation.

    Does the recline 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 recline motor/position sensor 5P connector.
  12. Check for continuity between power seat control unit connector A (40P) terminals No. 10, No. 15, and No. 29 and the recline motor/position sensor 5P connector terminals No. 5, No. 3, and No. 4 respectively.
    Fig 1: Checking Continuity Between Power Seat Control Unit Connector A (40P) Terminals 10 And Recline Motor/Position Sensor 5P Connector Terminals 5
    G08061458Courtesy 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 power seat control unit connector A (40P) terminal No. 10 and body ground.
    Fig 2: Checking Continuity Between Power Seat Control Unit Connector A (40P) Terminal No. 10 And Body Ground
    G08061459Courtesy 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 the recline motor/position sensor 5P connector terminals No. 5 (+) and No. 4(-).
    Fig 3: Measuring Voltage Between Recline Motor/Position Sensor 5P Connector Terminals No. 5 (+) And No. 4(-)
    G08061460Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Replace the seat frame assembly (see FRONT SEAT FRAME REPLACEMENT - DRIVER'S SEAT ).

    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 recline motor/position sensor 5P connector.
  20. Check for continuity between power seat control unit connector A (40P) terminals No. 15 and No. 29 and recline motor/position sensor 5P connector terminals No. 3 and No. 4 respectively.
    Fig 4: Checking Continuity Between Power Seat Control Unit Connector A (40P) Terminals 15 And Recline Motor/Position Sensor 5P Connector Terminals 3
    G08061461Courtesy 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
    G08061462Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage when the recline switch is operated? 

    YES  -Replace the seat frame assembly (see FRONT SEAT FRAME REPLACEMENT - DRIVER'S SEAT ).

    NO  -Replace the power seat control unit.

  24. Check the No. 13 (20 A) fuse in the under-hood fuse/relay box.

    Is the fuse OK? 

    YES  -Go to step 25.

    NO  -Replace the fuse. If the fuse is blown again, repair the short to ground in the No. 13 (20 A) fuse circuit.

  25. Disconnect under-hood fuse/relay box connector E (10P).
  26. Disconnect power seat control unit connector B (18P).
  27. Check for continuity between under-hood fuse/relay box connector E (10P) terminal No. 10 and power seat control unit connector B (18P) terminal No. 1.
    Fig 6: Checking Continuity Between Under-Hood Fuse/Relay Box Connector E (10P) Terminal 10 And Power Seat Control Unit Connector B (18P) Terminal 1
    G08061463Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 28.

    NO  -Repair an open or high resistance in the wire. 28.

  28. Reconnect power seat control unit connector B (18P).
  29. Measure the voltage between power seat control unit connector B (18P) terminal No. 4 and body ground when operate the recline switch.
    Fig 7: Measuring Voltage Between Power Seat Control Unit Connector B (18P) Terminal No. 4 And Body Ground
    G08061464Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there more than 0.2 V? 

    YES  -Repair an open or high resistance in the ground wire or poor ground (G551).

    NO  -Go to step 30.

  30. Turn the ignition switch to LOCK (0).
  31. Disconnect power seat control unit connector B (18P).
  32. Disconnect the recline motor/position sensor 5P connector.
  33. Check for continuity between power seat control unit connector B (18P) terminals No. 9 and No. 11 and recline motor/position sensor 5P connector terminals No. 1 and No. 2 respectively.
    Fig 8: Checking Continuity Between Power Seat Control Unit Connector B (18P) Terminals No. 9 And Recline Motor/Position Sensor 5P Connector Terminals 1
    G08061465Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 34.

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

  34. Check for continuity between body ground and recline motor/position sensor 5P connector terminals No. 1 and No. 2 individually.
    Fig 9: Checking Continuity Between Body Ground And Recline Motor/Position Sensor 5P Connector Terminals No. 1
    G08061466Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to ground in the wire.

    NO  -Go to step 35.

  35. Test the recline 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 seat frame assembly (see FRONT SEAT FRAME REPLACEMENT - DRIVER'S SEAT ).

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