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DTC B1833: Left Mirror Vertical Sensor Malfunction

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 DTC with the HDS.
  2. Turn the ignition switch OFF, and then back ON (II).
  3. Operate the left power mirror tilts up or down with the power mirror switch.
  4. Check for DTCs with the HDS.

    Is DTC B1833 indicated? 

    1. YES  - Go to step  5.
    2. NO  - Intermittent failure, the system is OK at this time.
  5. Turn the ignition switch OFF.
  6. Remove the driver's dashboard lower cover (see DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTAL ).
  7. Remove the driver's and front passenger's door panels (see FRONT DOOR PANEL REMOVAL/INSTALLATION ).
  8. Disconnect the power mirror control unit 26P connector.
  9. Disconnect the left and right power mirror 13P connectors.
  10. Check for continuity between the left power mirror connector (13P) No. 9 terminal and body ground.
    Fig 1: Checking Continuity Between Left Power Mirror Connector (13P) No. 9 Terminal & Body Ground
    G03662386Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Repair a short in the RED/WHT wire.
    2. NO  - Go to step  11.
  11. Connect the power mirror control unit connector (26P) No. 8 terminal to body ground with a jumper wire.
    Fig 2: Connecting Power Mirror Control Unit Connector (26P) No. 8 Terminal To Body Ground
    G03662387Courtesy of AMERICAN HONDA MOTOR CO., INC.
  12. Check for continuity between the left power mirror connector (13P) No. 9 terminal and body ground.
    Fig 3: Checking Continuity Between Left Power Mirror Connector (13P) No. 9 Terminal & Body Ground
    G03662388Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Go to step  13.
    2. NO  - Repair an open in the RED/WHT wire.
  13. Check for continuity between the left power mirror connector (13P) No. 7 terminal and body ground.
    Fig 4: Checking Continuity Between Left Power Mirror Connector (13P) No. 7 Terminal & Body Ground
    G03662389Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Repair a short in the GRY wire.
    2. NO  - Go to step  14.
  14. Connect the power mirror control unit connector (26P) No. 5 terminal to body ground with a jumper wire.
    Fig 5: Connecting Power Mirror Control Unit Connector (26P) No. 5 Terminal To Body Ground
    G03662390Courtesy of AMERICAN HONDA MOTOR CO., INC.
  15. Check for continuity between the left power mirror connector (13P) No. 7 terminal and body ground.
    Fig 6: Checking Continuity Between Left Power Mirror Connector (13P) No. 7 Terminal & Body Ground
    G03662391Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Go to step  16.
    2. NO  - Repair an open in the GRY wire.
  16. Check for continuity between the power mirror control unit connector (26P) No. 7 terminal and body ground.
    Fig 7: Checking Continuity Between Power Mirror Control Unit Connector (26P) No. 7 Terminal & Body Ground
    G03662392Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Repair a short in the LT GRN/RED wire.
    2. NO  - Go to step  17.
  17. Connect the power mirror control unit connector (26P) No. 7 terminal to body ground with a jumper wire.
    Fig 8: Connecting Power Mirror Control Unit Connector (26P) No. 7 Terminal To Body Ground
    G03662393Courtesy of AMERICAN HONDA MOTOR CO., INC.
  18. Check for continuity between the left power mirror connector (13P) No. 6 terminal and body ground.
    Fig 9: Checking Continuity Between Left Power Mirror Connector (13P) No. 6 Terminal & Body Ground
    G03662394Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Go to step  19.
    2. NO  - Repair an open in the LT GRN/RED wire.
  19. Reconnect the power mirror control unit connector (26P).
  20. Turn the ignition switch ON (II).
  21. Measure voltage between the power mirror control unit connector (26P) No. 8 and No. 7 terminals.
    Fig 10: Measuring Voltage Between Power Mirror Control Unit Connector (26P) No. 8 & No. 7 Terminals
    G03662395Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    1. YES  - Faulty left power mirror position sensor; replace the power mirror actuator (see POWER MIRROR ACTUATOR REPLACEMENT ).
    2. NO  - Substitute a known-good power mirror control unit, and recheck. If DTC is gone, the original power mirror control unit is faulty; replace it.
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