IGNITION SYSTEM ON-VEHICLE INSPECTION


  1. PERFORM SPARK TEST


    1. Check for DTCs Click here.

      Note

      If any DTC is present, perform troubleshooting procedures for that DTC.

    2. Check if spark occurs.


      1. Remove the ignition coils and spark plug Click here.

      2. Install each spark plug to the ignition coil and connect the ignition coil connector.

      3. A0161E6

        Disconnect the 2 fuel delivery pipe connectors.

      4. A0162JHE01

        Disconnect the 4 connectors with wire harness locks from the 2 injector drivers.

        Tech Tips

        To release each connector lock, push the claw downward ("Release" in the illustration) and move the lock lever ("Move" in the illustration).

      5. A0162NL

        Ground the spark plug.

      6. Visually check that spark occurs while the engine is being cranked.

        Note


        • Be sure to ground the spark plug when checking.

        • If the ignition coil has been struck or dropped, replace it.

        • Do not crank the engine for more than 2 seconds.

        If spark does not occur, perform the following procedure.

    3. Perform the spark test according to the procedures below:


      1. Check that the wire harness side connector of the ignition coil with igniter is securely connected.

        Result
        Result Action
        NG Connect securely
        OK Go to next step

      2. Perform a spark test on each ignition coil with igniter.


        1. If there is a cylinder where spark does not occur, replace its ignition coil with the ignition coil of a cylinder where spark occurs normally.

        2. Crank the engine and visually check that spark occurs at the cylinder with the normally operating ignition coil.

        Result
        Result Action
        OK Replace ignition coil with igniter
        NG Go to next step

      3. Inspect the spark plug.

        Result
        Result Action
        NG Replace spark plug
        OK Go to next step

      4. Check the power supply to the ignition coil with igniter.


        1. Turn the engine switch on (IG).

        2. A0162LZE01

          Check that there is battery voltage at the ignition coil positive (+) terminal.

          Standard Voltage
          Tester Connection Switch Condition Standard Voltage
          1 (+B) - 4 (GND) Engine switch on (IG) 11 to 14 V
        Result
        Result Action
        NG Check wiring between engine switch and ignition coil with igniter
        OK Go to next step

      5. Check the VVT sensor Click here.

      6. Check the camshaft position sensor Click here.

      7. Check the crankshaft position sensor Click here.

      8. Check the IGT signal circuit Click here.

    4. Using a 16 mm plug wrench, install the spark plug.

      Torque:
      21 N*m  { 214 kgf*cm, 15 ft.*lbf }
    5. A0161ZFE01

      Connect the 4 connectors with wire harness locks to the 2 injector drivers.

      Note

      Connect the connectors securely.

      Tech Tips

      Move the lock lever in the direction indicated by the arrow to lock the connector.

    6. A0161E6

      Connect the 2 fuel delivery pipe connectors.

    7. Install the ignition coils Click here.

  2. INSPECT 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. A015Z8QE01

      Check the electrode.


      1. Using a megohmmeter, measure the insulation resistance.

        Standard insulation resistance
        10 MΩ or more

        Tech Tips

        If a megohmmeter is not available, perform the following alternative inspection method instead.

    2. A015ZFY

      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. A0160YBE01

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

      If there is any damage, replace the spark plug. If not, reinstall the spark plug.

      Recommended Spark Plug
      Manufacturer Product
      DENSO made FK20HBR11

      Tech Tips

      A015YOAE01

      Maximum electrode gap for a used spark plug: 1.4 mm (0.0551 in.)

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

      Electrode gap for a new spark plug: 1.0 to 1.1 mm (0.0394 to 0.0433 in.)

      Note

      A016240E01

      Never attempt to adjust the gap of a used plug.

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

      Standard air pressure
      588 kPa (6.0 kgf/cm2, 85 psi)
      Standard duration
      20 seconds or less

      Tech Tips

      Only use the 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.