2005 Toyota Avalon XLSFACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection

NOTE: In this section, the terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10°C (14°F) to 50°C (122°F). "Hot" means approximately 50°C (122°F) to 100°C (212°F).
  1. INSPECT IGNITION COIL ASSY PERFORMANCE AND PERFORM SPARK TEST 
    1. Check for DTCs.
      NOTE: If any DTC is present, perform troubleshooting in accordance with the procedures for that DTC.
    2. Check that spark occurs.
      1. Remove the V-bank cover (see REPLACEMENT ).
      2. Remove the intake air surge tank (see REPLACEMENT ).
      3. Remove the ignition coils.
      4. Using a 16 mm (0.63 in.) plug wrench, remove the spark plugs.
      5. Install the spark plugs to each ignition coil, and connect the ignition coil connectors.
      6. Disconnect the 6 injector connectors.
      7. Ground the spark plugs.
      8. Check if a spark occurs at each spark plug while engine is being cranked.
      NOTE:
      • Be sure to ground the spark plugs when checking.
      • Replace the ignition coil if it receives an impact.
      • Do not crank the engine for more than 2 seconds.

      If a spark does not occur, perform the following test:

      Fig 1: Spark Test Procedure Flow Chart
      G02974308Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using a 16 mm (0.63 in.) plug wrench, install the spark plugs.

      Torque: 18 N.m (184 kgf.cm, 13 ft.lbf) 

    4. Install the ignition coils.

      Torque: 7.5 N.m (76 kgf.cm, 66 in.lbf) 

    5. Install the intake air surge tank (see REPLACEMENT ).
    6. Install the V-bank cover (see REPLACEMENT ).
  2. CHECK VVT SENSOR OUTPUT VOLTAGE 
    1. Turn the ignition switch on (IG).
    2. Check that the voltage between terminal VC1 and ground is 5 V.

      HINT:

      For the terminal arrangement of the engine ECU, see TERMINALS OF ECM .

    3. While turning the crankshaft pulley by hand, measure the voltage between each terminal. Check that the voltage changes between the Hi range and Lo range as shown in the table below.

      HINT:

      For the terminal arrangement of the engine ECU, see TERMINALS OF ECM .

      SENSOR POSITION, TERMINAL NO AND VOLTAGE

      Sensor position Terminal No. Voltage (Hi) Voltage (Lo)
      Intake camshaft (Bank 1) VV1+ - VV1- 3.375 to 4.950 0.450 to 1.375
      Intake camshaft (Bank 2) VV2+ - VV2- 3.375 to 4.950 0.450 to 1.375
      Exhaust camshaft (Bank 1) EV1+ - EV1- 3.375 to 4.950 0.450 to 1.375
      Exhaust camshaft (Bank 2) EV2+ - EV2- 3.375 to 4.950 0.450 to 1.375
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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