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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 796 (AIR CONDITIONING)PRESSURE SWITCHON-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 2004 Lexus IS 300. 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. DISCONNECT CONNECTOR FROM PRESSURE SWITCH 
  3. RUN ENGINE AT APPROX. 1,500 RPM 
    Fig 1: Disconnecting Connector From Pressure Switch
    G00889049Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Magnetic clutch control: INSPECT PRESSURE SWITCH OPERATION 
    1. Connect the positive (+) lead from the ohmmeter to terminal 4 and the negative (-) lead to terminal 1.
    2. Check continuity between terminals when refrigerant pressure is changed, as shown in Fig 2 .

    If operation is not as specified, replace the pressure switch.

    Fig 2: Magnetic Clutch Control: Pressure Switch Operation Diagram
    G00889050Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Cooling fan control: INSPECT PRESSURE SWITCH OPERATION 
    1. Connect the positive (+) lead from the ohmmeter to terminal 2 and the negative (-) lead to terminal 3.
    2. Check continuity between terminals when refrigerant pressure is changed, as shown in Fig 3 .

    If operation is not as specified, replace the pressure switch.

  6. STOP ENGINE AND SET OFF MANIFOLD GAUGE SET 
  7. CONNECT CONNECTOR TO PRESSURE SWITCH 
    Fig 3: Cooling Fan Control: Pressure Switch Operation Diagram
    G00889051Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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