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DTC B1828: Power Seat Recline Motor Pulse Error

WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. 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 ).
  • DTC B1828 is, even the system is OK, stored when the recline switch is operated more than one second after the seat back reclines most forward or most backward position.
  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 for more than 2 seconds.
  4. Check for DTCs with the HDS.

    Is DTC B1828 indicated? 

    1. YES  - Go to step 5.
    2. NO  - Intermittent failure. The recline motor/position sensor is OK at this time. Check for loose or poor connections at the power seat control unit connector.
  5. Check for DTCs with the HDS.

    Is DTC B1836 also indicated? 

    1. YES  - Go to DTC B1836 troubleshooting (see DTC B1836: POWER SEAT POSITION SENSOR CIRCUIT SHORT  ).
    2. NO  - Go to step 6.
  6. Check for DTCs with the HDS.

    Are DTCs B1825, B1826, and/or B1827 also indicated? 

    1. YES  - Go to step  16.
    2. NO  - Go to step 7.
  7. Operate the recline switch for 2 seconds and check the recline motor operation.

    Does the recline motor run smoothly? 

    1. YES  - Go to step 8.
    2. NO  - Go to step  17.
  8. Turn the ignition switch OFF.
  9. Disconnect the power seat control unit connector A (40P).
  10. Disconnect the recline motor/position sensor 5P connector.
  11. Check for continuity between the power seat control unit connector A (40P) No. 10 and No. 29 terminals and recline motor/position sensor 5P connector No. 4 and No. 5 terminals.
    Fig 1: Checking Continuity Between Power Seat Control Unit Connector A (40P) Terminals 10 & 29 And Recline Motor/Position Sensor 5P Connector Terminals 4 & 5
    G03706926Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Go to step 12.
    2. NO  - Repair an open in the wire.
  12. Check for continuity between the power seat control unit connector A (40P) No. 10 terminal and body ground.
    Fig 2: Checking Continuity Between Power Seat Control Unit Connector A Terminal 10 And Body Ground
    G03706927Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Repair a short in the wire.
    2. NO  - Go to step 13.
  13. Reconnect the power seat control unit A (40P).
  14. Turn the ignition switch ON (II).
  15. Measure voltage between the recline motor/position sensor 5P connector No. 3 (+) and No. 4 (-) terminals.
    Fig 3: Measuring Voltage Between Recline Motor/Position Sensor 5P Connector Terminals 3 And 4
    G03706928Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 10 V? 

    1. YES  - Replace the recline motor/position sensor.
    2. NO  - Check for an open in the WHT/BLK wire. If the wire is OK, substitute a known-good power seat control unit. If the problem is repaired, replace the power seat control unit.
  16. Measure voltage between the 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) Terminals 15 And 29
    G03706929Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 10 V when the recline switch is operated? 

    1. YES  - Replace the recline motor/position sensor.
    2. NO  - Replace the power seat control unit.
  17. Turn the ignition switch OFF.
  18. Disconnect the power seat control unit connector B (18P).
  19. Disconnect the recline motor/position sensor 5P connector.
  20. Check for continuity between the power seat control unit connector B (18P) No. 9 and No. 11 terminals and recline motor/position sensor 5P connector No. 1 and No. 2 terminals.
    Fig 5: Checking Continuity Between Power Seat Control Unit Connector B (18P) Terminals 9 & 11 And Recline Motor/Position Sensor 5P Connector Terminals 1 & 2
    G03706930Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Go to step 21.
    2. NO  - Repair an open in the wire.
  21. Check for continuity between the recline motor/position sensor 5P connector No. 1 and No. 2 terminals and body ground.
    Fig 6: Checking Continuity Between Recline Motor/Position Sensor 5P Connector Terminals 1 & 2 And Body Ground
    G03706931Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Repair a short in the wire.
    2. NO  - Go to step 22.
  22. Perform the recline motor test (see DRIVER'S POWER SEAT MOTOR TEST  ).

    Is the motor OK? 

    1. YES  - Replace the power seat control unit.
    2. NO  - Replace the recline motor/position sensor.
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