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'10 Model

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  1. Operate the climate control system with the passenger's climate control switch in all modes.

    Does the climate control system operate? 

    YES  -Intermittent failure. Check for loose wires or poor connections at the driver's and passenger's climate control switches, and at the climate control unit.

    NO  -Go to step 2.

  2. Operate the climate control system with the driver's climate control switch in all modes.

    Does the climate control system operate? 

    YES  -Go to step 3.

    NO  -Go to step  11.

  3. Turn the ignition switch to LOCK (0).
  4. Disconnect the passenger's climate control switch 12P connector.
  5. Turn the ignition switch to ON (II).
  6. Measure the voltage between passenger's climate control switch 12P connector terminal No. 6 and body ground.
    Fig 1: Measuring Voltage Between Passenger's Climate Control Switch 12P Connector Terminal No. 6 And Body Ground
    G06424111Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step 7.

    NO  -Repair an open in the wire between the passenger's climate control switch and the No. B16 (7.5 A) fuse in the driver's under-dash fuse/relay box.

  7. Turn the ignition switch to LOCK (0).
  8. Disconnect the driver's climate control switch 16P connector.
  9. Check for continuity between the following terminals of the passenger's climate control switch 12P connector and the driver's climate control switch 16P connector.

    12P: 16P: 

    No. 7 No. 3

    No. 8 No. 4

    No. 9 No. 8

    No. 10 No. 7

    No. 11 No. 6

    No. 12 No. 5

    Fig 2: Checking For Continuity Between Following Terminals Of Passenger's Climate Control Switch 12P Connector And Driver's Climate Control Switch 16P Connector
    G06424112Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 10.

    NO  -Repair an open in the wires between the driver's climate control switch and the passenger's climate control switch.

  10. Check for continuity between body ground and passenger's climate control switch 12P connector terminals No. 7, No. 8, No. 9, No. 10, No. 11, and No. 12 individually.
    Fig 3: Checking For Continuity Between Body Ground And Passenger's Climate Control Switch 12P Connector Terminals No. 7, No. 8, No. 9, No. 10, No. 11, And No. 12 Individually
    G06424113Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to body ground in the wire(s) between the driver's climate control switch and the passenger's climate control switch.

    NO  -Substitute a known-good passenger's climate control switch, and recheck. If the symptom goes away, replace the original passenger's climate control switch (see CLIMATE CONTROL SWITCH REMOVAL/INSTALLATION  ).

  11. Turn the ignition switch to LOCK (0).
  12. Disconnect the driver's climate control switch 16P connector.
  13. Turn the ignition switch to ON (II).
  14. Measure the voltage between driver's climate control switch 16P connector terminal No. 14 and body ground.
    Fig 4: Measuring Voltage Between Driver's Climate Control Switch 16P Connector Terminal No. 14 And Body Ground
    G06424114Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step 15.

    NO  -Repair an open in the wire between the driver's climate control switch and the No. B16 (7.5 A) fuse in the driver's under-dash fuse/relay box.

  15. Turn the ignition switch to LOCK (0).
  16. Check for continuity between driver's climate control switch 16P connector terminal No. 11 and body ground.
    Fig 5: Checking For Continuity Between Driver's Climate Control Switch 16P Connector Terminal No. 11 And Body Ground
    G06424115Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 17.

    NO  -Check for an open in the wire between the driver's climate control switch and body ground. If the wire is OK, check for poor ground at G502 (see AUDIO WIRE HARNESS (WITH NAVIGATION SYSTEM) (AA) ).

  17. Disconnect climate control unit connector A (28P).
  18. Check for continuity between driver's climate control switch 16P connector terminal No. 12 and climate control unit connector A (28P) terminal No. 15.
    Fig 6: Checking For Continuity Between Driver's Climate Control Switch 16P Connector Terminal No. 12 And Climate Control Unit Connector A (28P) Terminal No. 15
    G06424116Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 19.

    NO  -Repair an open in the wire(s) between the driver's climate control switch and the climate control unit.

  19. Check for continuity between driver's climate control switch 16P connector terminals No. 11 and No. 12.
    Fig 7: Checking For Continuity Between Driver's Climate Control Switch 16P Connector Terminals No. 11 And No. 12
    G06424117Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to another wire.

    NO  -Go to step 20.

  20. Reconnect the driver's climate control switch 16P connector.
  21. Reconnect climate control unit connector A (28P).
  22. Turn the ignition switch to ON (II).
  23. Press and hold the FAN UP button, then press the ON/OFF button.

    Is the REC button LED blinking? 

    YES  -Go to step 24.

    NO  -Substitute a known-good driver's climate control switch (see CLIMATE CONTROL SWITCH BULB REPLACEMENT  ), and recheck the function. If the symptom is still present, replace the climate control unit (see CLIMATE CONTROL UNIT REMOVAL/INSTALLATION  ).

  24. Check the driver's climate control switch LEDs.

    Are the REC button and AUTO button LEDs blinking? 

    YES  -Driver's climate control switch is faulty, replace the driver's climate control switch (see CLIMATE CONTROL SWITCH BULB REPLACEMENT  ).

    NO  -Go to step 25.

  25. Check the driver's climate control switch LEDs.

    Are the REC button and SYNC button LEDs blinking? 

    YES  -Substitute a known-good driver's climate control switch, and recheck the function. If the symptom is still present, replace the climate control unit (see CLIMATE CONTROL UNIT REMOVAL/INSTALLATION  ).

    NO  -Check for loose wires or poor connections at climate control unit connector A (28P) and driver's climate control switch 16P connector. If the connections are good, replace the climate control unit (see CLIMATE CONTROL UNIT REMOVAL/INSTALLATION  ).

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