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HOMESERVICE MANUALSACURA2008CSX BASE, K20A3REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 17 (CLIMATE CONTROL SYSTEM)CLIMATE CONTROLAUDIO COMMUNICATION LINE CIRCUIT TROUBLESHOOTINGWITHOUT NAVIGATION
2008 Acura CSX Base, K20A3

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2008 Acura CSX Base, K20A3SECTION Without Navigation
WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect climate control unit connector A (32P) and the audio-HVAC display unit 12P connector
  2. Check for continuity between the following terminals of climate control unit connector A (32P) and the audio-HVAC display unit 12P connector

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    32P 12P

    No 3 No 7

    No 4 No 8

    Fig 1: Checking Continuity Between Terminals Of Climate Control Unit Connector A (32P) And Audio-HVAC Display Unit 12P Connector
    G05988658Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 3

    NO  -Repair open in the wire between climate control unit connector A (32P) and the audio-HVAC display unit 12P connector

  3. Check for continuity between body ground and climate control unit connector A (32P) terminals No 3 and No 4 individually
    Fig 2: Checking Continuity Between Body Ground And Climate Control Unit Connector A (32P) Terminals 3 And 4
    G05988659Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between climate control unit connector A (32P) and the audio-HVAC display unit 12P connector

    NO  -Go to step 4

  4. Reconnect climate control unit connector A (32P)
  5. Connect the audio-HVAC display unit 12P connector No 7 and No 8 terminals with a jumper wire
    Fig 3: Connecting Audio-HVAC Display Unit 12P Connector 7 And 8 Terminals With Jumper Wire
    G05988660Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Turn the ignition switch to ON (II)
  7. Press and hold the front DEF button and OFF button

    Is the front DEF button LED blinking? 

    YES  -The audio-HVAC display unit is faulty, replace the audio-HVAC display unit (see AUDIO-HVAC DISPLAY UNIT REMOVAL/INSTALLATION )

    NO  -The climate control unit is faulty, replace the climate control unit (see CLIMATE CONTROL UNIT REMOVAL/INSTALLATION )

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.