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HOMESERVICE MANUALSACURA20043.5RLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 54 (AUTOMATIC A/C SYSTEMS)CLIMATE CONTROL POWER AND GROUND CIRCUITS TROUBLESHOOTING
2004 Acura 3.5RL

Climate Control Power and Ground Circuits Troubleshooting

2004 Acura 3.5RLSECTION Climate Control Power and Ground Circuits Troubleshooting
WARNING: This page is about a different car, the 2003 Acura 3.2CL and 2002 Acura 3.2CL. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check the No. 54 (40A) fuse in the under-hood fuse/ relay box, the No. 3 (7.5A) fuse in the driver's under-dash fuse/relay box, and the No. 13 (15A) fuse in the passenger's under-dash fuse/relay box.

    Are the fuses OK  ?

    1. YES  : Go to step 2.
    2. NO  : Replace the fuse(s), and recheck.
  2. Disconnect climate control unit connector A (12P).
  3. Turn the ignition switch ON (II).
  4. Measure the voltage between the No. 11 terminal of climate control unit connector A (12P) and body ground.
    Fig 1: Measuring Voltage Between The Climate Control Unit Connector A (12P) And Body Ground
    G01165240Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage  ?

    1. YES  : Go to step 5.
    2. NO  : Repair open in the wire between the No. 3 fuse in the driver's under-dash fuse/relay box and the climate control unit.
  5. Turn the ignition switch OFF.
  6. Measure the voltage between the No. 10 terminal of climate control unit connector A (12P) and body ground.
    Fig 2: Measuring Voltage Between The Climate Control Unit Connector A (12P) And Body Ground
    G01165241Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage  ?

    1. YES  : Go to step 7.
    2. NO  : Repair open in the wire between the No. 13 fuse in the passenger's under-dash fuse/relay box and the climate control unit.
  7. Check for continuity between the No. 3 terminal of climate control unit connector A (12P) and body ground.
    Fig 3: Checking Continuity Between The No. 3 Terminal Of Climate Control Unit Connector A (12P) And Body Ground
    G01165242Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity  ?

    1. YES  : Check for loose wires or poor connections at climate control unit connector A (12P). If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.
    2. NO  : Check for an open in the wire between the climate control unit and body ground. If the wire is OK, check for poor ground at G401.
RENDER: 1.0x

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