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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 357 (HVAC - GENERAL SERVICING)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 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Set on manifold gauge set  . See MANIFOLD GAUGE SET .
  2. Start engine  .
  3. Inspect compressor for metallic sound  :

    Check if there is a metallic sound from the compressor when the A/C switch is on.

    If metallic sound is not heard, replace the compressor assembly.

  4. Inspect refrigerant pressure  . See ON-VEHICLE INSPECTION .
  5. Stop engine  .
  6. Inspect visually for leakage of refrigerant from safety seal  .

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

  7. Set off manifold gauge set  . See MANIFOLD GAUGE SET .
  8. Check for leakage of grease from clutch bearing  .
  9. Check for signs of oil on pressure plate  .

    If necessary, repair or replace.

  10. Inspect magnetic clutch bearing for noise  :
    1. Start engine.
    2. Check for abnormal noise from near the compressor when the A/C switch is OFF.

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

  11. 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. See Fig 1.
    3. Check that the magnetic clutch is energized.

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

    Fig 1: Locating Terminal No. 3
    G01127845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. Inspect compressor lock sensor resistance  :
    1. Disconnect the connector.
    2. Measure resistance between terminals 1 and 2. See Fig 2.

      Standard resistance: 

      165 - 205 +/- at 20°C (68°F) 

      If resistance is not as specified, replace the compressor.

    Fig 2: Locating Terminals No. 1 & 2
    G01127846Courtesy 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.