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.

2002 Lexus ES 300FACTORY OEM SERVICE PROCEDURE

SFI System: Inspection

Intake air flow meter sub-assembly.
1. Output voltage inspection.
  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. Resistance inspection.
  1. Using an ohmmeter, measure the resistance between terminals 4 (THA) and 5 (E2).
    1. Resistance:
      1. -20°C (-4°F) 13.6-18.4 K-ohms
      2. 20°C (68°F) 2.21-2.69 K-ohms
      3. 60°C (140°F) 0.493-0.667 K-ohm
  Fig 1: Displaying Intake Air Flow Meter Sub-Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Camshaft timing oil control valve assembly.
1. Resistance inspection.
  1. Using an ohmmeter, measure the resistance between the terminals.
  Resistance: 6.9-7.9 ohms at 20°C (68°F)
2. Movement inspection.
  1. Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to terminal 2, and check the movement of the valve.
  NOTE: Confirm the valve does not adhere.

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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.