LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Acura >> 2009 >> MDX >> Repair and Diagnosis >> Accessories & Equipment >> Memory Modules >> Driver Position Memory System (DPMS) >> DTC Troubleshooting >> DTC B1841: Telescopic Motor Pulse Error
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC B1841: Telescopic 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 ON (II).
  3. Operate the telescopic switch in each direction for more than 1 second.
  4. Check for DTCs with the HDS.

    Is DTC B1841 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 B1840 also indicated? 

    YES  - Go to step  17.

    NO  - Go to step 6.

  6. Clear the DTCs with the HDS.
  7. Turn the ignition switch to LOCK (0), and then back ON (II).
  8. Operate the telescopic switch for 2 seconds, and check the telescopic motor operation.

    Does the tilt motor run smoothly? 

    YES  - Go to step 9.

    NO  - Go to step  26.

  9. Turn the ignition switch to LOCK (0).
  10. Disconnect power tilt/telescopic control unit connector A (16P).
  11. Disconnect the telescopic motor/position sensor 6P connector.
  12. Check for continuity between power tilt/telescopic control unit connector A (16P) No. 5, No. 13, and No. 16 terminals and telescopic motor/position sensor 6P connector No. 4, No. 5, and No. 6 terminals respectively.
    Fig 1: Identifying Continuity Between No. 5, No. 13, And No. 16 Terminals And No. 4, No. 5, And No. 6 Terminals
    G05488279Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Go to step 13.

    NO  - Repair open in the wire.

  13. Check for continuity between body ground and power tilt/telescopic control unit connector A (16P) No. 5 and No. 13 terminals individually.
    Fig 2: Identifying Continuity Between Body Ground And Power Tilt/Telescopic Control Unit Connector A (16P) No. 5 And No. 13 Terminals
    G05488280Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Repair short to ground in the wire.

    NO  - Go to step 14.

  14. Reconnect power tilt/telescopic control unit connector A (16P).
  15. Turn the ignition switch ON (II).
  16. Measure the voltage between telescopic motor/ position sensor 6P connector No. 4 and No. 6 terminals and between No. 5 and No. 6 terminals.
    Fig 3: Identifying Voltage Between No. 4 And No. 6 Terminals And No. 5 And No. 6 Terminals
    G05488281Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  - Faulty telescopic motor/position sensor, replace the telescopic motor assembly.

    NO  - If there is no voltage, replace the power tilt/ telescopic control unit. If there is battery voltage, repair a short in the wire.

  17. Turn the ignition switch to LOCK (0).
  18. Disconnect power tilt/telescopic control unit connector A (16P).
  19. Disconnect the telescopic motor/position sensor 6P connector.
  20. Check for continuity between power tilt/telescopic control unit connector A (16P) No. 2 and No. 16 terminals and telescopic motor/position sensor 6P connector No. 3 and No. 6 terminals respectively.
    Fig 4: Identifying Continuity Between No. 2 And No. 16 Terminals And No. 3 And No. 6 Terminals
    G05488282Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Go to step 21.

    NO  - Repair open in the wire.

  21. Disconnect the tilt motor/position sensor 8P connector.
  22. Check for continuity between telescopic motor/ position sensor 6P connector No. 3 terminal and body ground.
    Fig 5: Identifying Continuity Between Telescopic Motor/ Position Sensor 6P Connector No. 3 Terminal And Body Ground
    G05488283Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Repair short to ground in the wire.

    NO  - Go to step 23.

  23. Reconnect power tilt/telescopic control unit connector A (16P).
  24. Turn the ignition switch ON (II).
  25. Measure the voltage between power tilt/telescopic control unit connector A (16P) No. 2 and No. 16 terminals.
    Fig 6: Identifying Voltage Between Power Tilt/Telescopic Control Unit Connector A (16P) No. 2 And No. 16 Terminals
    G05488284Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage when the telescopic switch is operated? 

    YES  - Faulty telescopic motor/position sensor, replace the telescopic motor assembly.

    NO  - Replace the power tilt/telescopic control unit.

  26. Turn the ignition switch to LOCK (0).
  27. Disconnect power tilt/telescopic control unit connector B (8P).
  28. Disconnect the telescopic motor/position sensor 6P connector.
  29. Check for continuity between power tilt/telescopic control unit connector B (8P) No. 4 and No. 6 terminals and telescopic motor/position sensor 6P connector No. 1 and No. 2 terminals respectively.
    Fig 7: Identifying Continuity Between No. 4 And No. 6 Terminals And No. 1 And No. 2 Terminals
    G05488285Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Go to step 30.

    NO  - Repair open in the wire.

  30. Check for continuity between body ground and telescopic motor/position sensor 6P connector No. 1 and No. 2 terminals individually.
    Fig 8: Identifying Continuity Between Body Ground And Telescopic Motor/Position Sensor 6P Connector No. 1 And No. 2 Terminals
    G05488286Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Repair short to ground in the wire.

    NO  - Go to step 31.

  31. Test the telescopic motor (see POWER TILT/TELESCOPIC STEERING MOTOR TEST  ).

    Is the motor OK? 

    YES  - Replace the power tilt/telescopic control unit.

    NO  - Replace the telescopic motor/position sensor.

scientia non olet · About LEMON Manuals