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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 530 (AIR CONDITIONING)COMPRESSOR AND MAGNETIC CLUTCHON-VEHICLE INSPECTION
2004 Toyota Matrix XR, FWD, Standard

On-Vehicle Inspection

2004 Toyota Matrix XR, FWD, StandardSECTION On-Vehicle Inspection
WARNING: This page is about a different car, the 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT COMPRESSOR FOR METALLIC SOUND 

    Check there is abnormal metallic sound from the compressor when the A/C switch is ON.

    If abnormal metallic sound is heard, replace the compressor assembly.

  2. INSPECT REFRIGERANT PRESSURE (See  ON-VEHICLE INSPECTION   ) 
  3. INSPECT VISUALLY FOR LEAKAGE OF REFRIGERANT 

    Using a gas leak detector, check for leakage of refrigerant. If there is any leakage, replace the compressor assembly.

  4. INSPECT COMPRESSOR LOCK SENSOR RESISTANCE 
    1. Disconnect the connector.
    2. Measure resistance between terminals 1 and 2.

      Standard resistance: 990 - 1,210 Ω at 20°C (68 °F) 

    If resistance is not as specified, replace the compressor.

  5. MAKE THESE VISUAL CHECKS: 
    1. Leakage of grease from the clutch bearing.
    2. Signs of oil on the pressure plate or rotor.
  6. INSPECT MAGNETIC CLUTCH BEARING FOR NOISE 
    1. Start engine.
    2. Check for abnormal noise from the compressor when the A/C switch is OFF.

    If abnormal noise is being emitted, replace the rotor of magnetic clutch.

    Fig 1: Inspecting Compressor Lock Sensor Resistance
    G01314380Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. INSPECT MAGNETIC CLUTCH OPERATION 
    1. Disconnect the connector.
    2. Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead to the body ground.
    3. Check that the magnetic clutch is energized.

    If operation is not as specified, replace the magnetic clutch.

    Fig 2: Inspecting Magnetic Clutch Operation
    G01314381Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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.