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Home >> Toyota >> 2009 >> Venza 2.7 E, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (1AR-FE) - System Testing, Removal & Installation >> Ignition System >> On-Vehicle Inspection
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On-Vehicle Inspection

  1. CHECK IGNITION COIL ASSEMBLY AND PERFORM SPARK TEST 
    1. Check for DTCs (See DTC CHECK / CLEAR ).
      NOTE: If any DTC is output, perform troubleshooting procedures for that DTC.
    2. Check that spark occurs.
      1. Remove the ignition coils and spark plugs (See REMOVAL  ).
      2. Disconnect the 4 injector connectors.
      3. Install the spark plug into the ignition coil, and then connect the ignition coil connector.
        Fig 1: Locating Ignition Coil Connector
        G05999120Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Ground the spark plug.
      5. Check that spark occurs at each spark plug while the engine is being cranked.
        NOTE:
        • Be sure to ground the spark plugs when checking them.
        • If an ignition coil has been struck or dropped, replace it.
        • Do not crank the engine for more than 2 seconds.

        HINT:

        If spark does not occur, perform the following procedure (go to step "c").

      6. Connect the 4 fuel injector connectors.
      7. Install the spark plugs and ignition coils (See REMOVAL  ).
      8. Clear the DTCs (See DTC CHECK / CLEAR ).
        Fig 2: Checking Spark Plug Spark
        G06023392Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Perform the following spark test procedure (Step V).
      1. Check that the wire harness side connector of the ignition coil with igniter is securely connected.

        Result 

        RESULT CHART

        Result Action
        NG Connect securely
        OK Go to next step
      2. Perform a spark test on each ignition coil.
        1. Replace the ignition coil with a known good one.
        2. Perform the spark test again.

          Result 

          RESULT CHART

          Result Action
          NG Go to next step
          OK Replace ignition coil
      3. Perform a spark test on each spark plug.
        1. Replace the spark plug with a known good one.
        2. Perform the spark test again.

          Result 

          RESULT CHART

          Result Action
          NG Go to next step
          OK Replace spark plug
      4. Check that power is supplied to the ignition coil.
        1. Turn the ignition switch to ON.
        2. Measure the voltage according to the value (s) in the table below.

          Standard Voltage 

          TESTER CONNECTION SPECIFIED CONDITION CHART

          Tester Connection Condition Specified Condition
          1 (+B) - 4 (GND) Ignition switch ON 11 to 14 V

          Text in Illustration 

          ILLUSTRATION LEGEND

          *1 Front view of wire harness connector (to Ignition Coil)

          Result 

          RESULT CHART

          Result Action
          NG Check wiring between Ignition switch and Ignition coll with igniter and check ground circuit
          OK Replace the ECM
          Fig 3: Identifying Ignition Switch Connector Terminals
          G06023393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK SPARK PLUG 
    NOTE:
    • Do not use a wire brush for cleaning.
    • Do not attempt to adjust the electrode gap of a used spark plug.
    1. Check the electrode using a megohmmeter:

      Text in Illustration 

      ILLUSTRATION LEGEND

      *1 Ground
      1. Using a megohmmeter, measure the insulation resistance.

        Standard Insulation Resistance 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Condition Specified Condition
        Spark plug (terminal part) - Body ground Always 10 MΩ or higher
        Fig 4: Checking Spark Plug
        G06023394Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        • If the result is not as specified, clean the spark plug with a spark plug cleaner and measure the resistance again.
        • If a megohmmeter is not available, perform the following simple inspection instead.
    2. Alternative inspection method:
      1. Quickly accelerate the engine to 4000 rpm 5 times.
      2. Remove the spark plug.
      3. Visually check the spark plug.

        If the electrode is dry, the spark plug is functioning properly. If the electrode is damp, proceed to the next step.

    3. Check the spark plug for any damage to its thread and insulator.

      If there is any damage, replace the spark plug.

      Recommended Spark Plug 

      MANUFACTURER CHART

      Manufacturer Spark Plug Type
      DENSO SK16HR11
      Fig 5: Identifying Spark Plug Condition
      G04975478Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reference:
      1. Check the spark plug electrode gap.

        Maximum electrode gap for a used spark plug: 

        1.3 mm (0.0512 in.) 

        If the gap is more than the maximum, replace the spark plug.

        NOTE: Never attempt to adjust the gap of a used plug.

        Electrode gap for a new spark plug: 

        1.0 to 1.1 mm (0.0394 to 0.0433 in.) 

        Text in Illustration 

        ILLUSTRATION LEGEND

        *1 Spark plug electrode gap
        Fig 6: Identifying Spark Plug Electrode Gap
        G06023396Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Clean the spark plugs.

      If the electrode has traces of wet carbon, clean the electrode with a spark plug cleaner and then dry it.

      Standard air pressure: 

      588 kPa (6 kgf/cm 2  , 85 psi) 

      Standard duration: 

      20 seconds or less 

      HINT:

      Only use a spark plug cleaner when the electrode is free of oil. If the electrode has traces of oil, use gasoline to clean off the oil before using the spark plug cleaner.

      Fig 7: Cleaning Spark Plugs
      G04943796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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