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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 638 (ENGINE CONTROL SYSTEM (SFI) (1MZ-FE/3MZ-FE))INSPECTION
2004 Toyota Matrix XR, FWD, Standard

Section 638 (Engine Control System (SFI) (1MZ-FE/3MZ-FE)): Inspection

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection
WARNING: This page is about a different car, the 2004 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT MASS AIR FLOW METER 
    1. Check the output voltage.
      1. Apply battery voltage across terminals 1 (+B) and 2 (E2G).
      2. Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
      3. Blow air into the MAF meter, and check that the voltage fluctuates.
    2. Measure the resistance between terminals 4 (THA) and 5 (E2).

      Standard: 

      MASS AIR FLOW METER SPECIFIED CONDITION

      Condition Specified Condition
      -20 °C (-4°F) 13.6 to 18.4 kΩ
      20°C (68°F) 2.21 to 2.69 kΩ
      60°C (140°F) 0.493 to 0.667 kΩ

      If the result is not as specified, replace the MAF meter.

      Fig 1: Mass Air Flow Meter Resistance And Temperature Graph
      G02892161Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY 
    1. Measure the resistance between the terminals.

      Standard: 6.9 to 7.9 Ω at 20°C (68°F) 

      If the result is not as specified, replace the OCV assy.

    2. Connect the battery's positive (+) lead to terminal 1 and negative (-) lead to terminal 2, and check the movement of the valve.
      NOTE: Confirm that the valve moves freely and does not become stuck in any position.

      If necessary, replace the OCV assy.

      HINT:

      If the valve cannot return properly because of foreign matter, a small pressure leak in the advanced direction may occur and a DTC will be output.

      Fig 2: Applying Battery Power & Checking Movement Of Valve
      G02892162Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT ACCELERATOR PEDAL ASSY 
    1. Measure the resistance between the terminals.

      Standard: 

      ACCELERATOR PEDAL ASSY SPECIFIED CONDITION

      Tester Connection Specified Condition
      2 (VPA2) - 3 (EP1) 5.0 kΩ or less
      5 (VPA1) - 1 (EP2) 5.0 kΩ or less
      6 (VCP1) - 3 (EP1) 2.25 to 4.75 kΩ
      4 (VCP2) - 1 (EP2) 2.25 to 4.75 kΩ

      If the result is not as specified, replace the pedal assy.

      Fig 3: Identifying Accelerator Pedal Assembly Connector Terminals
      G02892163Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT THROTTLE BODY ASSY 
    1. Measure the resistance between the terminals.

      Standard: 

      THROTTLE BODY ASSY SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      2 (M+) - 1 (M-) 20°C (68°F) 0.3 to 100Ω
      5 (VC) - 3 (E2) 20°C (68°F) 2.0 to 4.0 kΩ

      If the result is not as specified, replace the throttle body assy.

      Fig 4: Identifying Throttle Body Assembly Connector Terminals
      G02892164Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT ENGINE COOLANT TEMPERATURE SENSOR 
    1. Measure the resistance between each terminal.

      Standard: 

      ENGINE COOLANT TEMPERATURE SENSOR SPECIFIED CONDITION

      Condition Specified Condition
      Approx. 20°C (68°F) 2.32 to 2.59 kΩ
      Approx. 80°C (176°F) 0.310 to 0.326 kΩ

      If the result is not as specified, replace the sensor.

      NOTE: If checking the engine coolant temperature sensor in the water, keep the terminals dry. After the check, wipe the sensor dry.
RENDER: 1.0x

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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.