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Home › Acura › 2003 › MDX Base › Repair and Diagnosis › Heating, Ventilation & A/C (HVAC) › HVAC Control Systems › Climate Control System › Manual Controls Circuit Troubleshooting

Manual Controls Circuit Troubleshooting

  1. Disconnect navigation or multi-information display unit connector A (5P).
  2. Disconnect climate control unit connector A (16P).
  3. Check for continuity between the following terminals of climate control unit connector A (16P) and navigation or multi-information display unit connector A (5P).
    TERMINALS REFERENCE

    16P 5P
    No. 8 No. 4
    No. 15 No. 3
    No. 16 No. 2
    Fig 1: Checking For Continuity Between Following Terminals Of Climate Control Unit Connector A And Navigation
    G03641853Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Go to step 4.
    2. NO  - Repair any open in the wire(s) between the climate control unit and the navigation or multi-information display unit.
  4. Check for continuity between the body ground and climate control unit connector A (16P) terminals No. 8, 15, and 16 individually.
    Fig 2: Checking For Continuity Between Body Ground And Climate Control Unit Connector A Terminals No. 8, 15, And 16
    G03641854Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Repair any short to body ground in the wire(s) between the climate control unit and the navigation or multi-information display unit.
    2. NO  - Check for loose wires or poor connections at climate control unit connector A (16P) and at navigation or multi-information display unit connector A (5P). If the connections are good, substitute a known-good climate control unit, and recheck. If the problem still exists, replace the navigation or multi-information display unit.
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