2005 Toyota Avalon XLSFACTORY OEM SERVICE PROCEDURE

Engine Control System: Inspection

  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 the 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 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: Inspecting Mass Air Flow Meter
      G02973286Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY 
    1. Using an ohmmeter, measure the resistance between the terminals.

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

    2. Connect the battery's positive (+) lead to terminal 1 and negative (-) lead to terminal 2. Check the movement of the valve.

      OK: 

      Fig 2: Camshaft Timing Oil Control Valve Chart
      G02973288Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If operation is not as specified, replace the valve.

      Fig 3: Inspecting Camshaft Timing Oil Control Valve Assy
      G02973287Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT THROTTLE W/MOTOR BODY ASSY 
    1. Measure the resistance between the terminals.

      Standard: 

      THROTTLE W/MOTOR BODY CONDITION

      Tester Connection Condition Specified Condition
      2 (M+) - 1 (M-) 20°C (68°F) 0.3 to 100 Ω
      5(VC)-3 (E2) 20°C(68°F) 1.2 to 3.2kΩ

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

      Fig 4: Inspecting Throttle W/Motor Body Assy
      G02973289Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT ENGINE COOLANT TEMPERATURE SENSOR 
    1. Measure the resistance between the terminals. Standard:
      ENGINE COOLANT TEMPERATURE CONDITION

      Condition Specified Condition
      Approx. 20°C (68°F) 2.32 to 2.59 kΩ
      Approx. 80°C (176°F) 0.31 to 0.326 kΩ

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

      NOTE: If checking the ECT sensor in the water, keep the terminals dry. After the check, wipe the sensor.
Factory Service Tools

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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.

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