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A/C Compressor Clutch Check

  1. Check the armature plate for discoloration, peeling, or other damage. If there is damage, replace the clutch set (see A/C COMPRESSOR CLUTCH OVERHAUL ).
  2. Check the rotor pulley bearing play and drag by rotating the rotor pulley by hand. Replace the clutch set with a new one if it is noisy or has excessive play/drag (see A/C COMPRESSOR CLUTCH OVERHAUL ).
    NOTE: The rotor pulley and the armature plate were mated at the factory by a burnishing operation. Always replace the pulley and the plate as a set. Replacing only one part of the clutch set will cause clutch slippage.
    Fig 1: Checking Rotor Pulley Bearing Play
    G08094387Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Measure the clearance between the rotor pulley (A) and the armature plate (B) all the way around. If the clearance is not within specified limits, remove the armature plate (see A/C COMPRESSOR CLUTCH OVERHAUL ) and add or remove shims as needed to increase or decrease clearance.

    Clearance: 0.35-0.65 mm (0.014-0.025 in) 

    NOTE: The shims are available in four thicknesses: 0.1 mm, 0.2 mm, 0.4 mm, and 0.5 mm.
    Fig 2: Measuring Clearance Between Rotor Pulley And Armature Plate
    G08094388Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Check the thermal protector for continuity between A/C compressor clutch 3P connector terminals No. 1 and No. 3. If there is no continuity, replace the thermal protector (see A/C COMPRESSOR THERMAL PROTECTOR REPLACEMENT ).
    NOTE: The thermal protector will have no continuity above 251 to 262°F (122 to 128°C). When the temperature drops below 240 to 219°F (116 to 104°C), the thermal protector will have continuity.
    Fig 3: Checking Thermal Protector For Continuity Between A/C Compressor Clutch 3P Connector Terminals No. 1 And No. 3
    G08094389Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. Release the field coil connector from the holder, then disconnect it. Check for continuity between A/C compressor clutch 3P connector terminal No. 2 and the 1P connector. If there is no continuity, replace the thermal protector (see A/C COMPRESSOR THERMAL PROTECTOR REPLACEMENT ).
    Fig 4: Checking Continuity Between A/C Compressor Clutch 3P Connector Terminal No. 2 And 1P Connector
    G08094390Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Disconnect the field coil connector (A). Check resistance of the field coil. If resistance is not within specifications, replace the field coil (see A/C COMPRESSOR CLUTCH OVERHAUL ).

    Field Coil Resistance: 

    - 3.35-3.65 Ω at 68°F (20°C) 

    Fig 5: Checking Resistance Between Field Coil Connector Terminals
    G08094391Courtesy of AMERICAN HONDA MOTOR CO., INC.
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