Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 6 (ENGINE CONTROL SYSTEM (SFI) (2ZZ-GE))SFI SYSTEM (2ZZ-GE)INSPECTION

2004 Toyota Matrix XR, FWD, Standard

SFI System (2ZZ-GE): Inspection

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection

WARNING: This page is about a different variant/trim than selected.

INTAKE AIR FLOW METER SUB-ASSY
1. Inspect the intake air flow meter resistance.
  1. Using an ohmmeter, measure the resistance between terminals THA and E2.
    
    Fig 1: Measuring Resistance Between Terminals THA & E2 Using An Ohmmeter
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Resistance:
    1. At -20°C (-4°F) 13.6 to 18.4 kΩ
    2. At 20°C (68°F) 2.21 to 2.69 kΩ
    3. At 60°C (140°F) 0.49 to 0.67 kΩ
  NOTE: If the resistance is not as specified, replace the intake air flow meter.
2. Inspect the intake air flow meter operation.
  1. Connect the intake air flow meter connector.
  2. Turn the ignition switch to ON.
  3. Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
  4. Blow air into the intake air flow meter, and check that the voltage fluctuates.
    
    Fig 2: Inspecting Intake Air Flow Meter Operation
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.