IGNITION SYSTEM > ON-VEHICLE INSPECTION

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NOTICE:
In this section, the terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C (122 to 212°F).



1. PERFORM SPARK TEST

  1. Check for DTCs.

    NOTICE:
    If a DTC is present, perform troubleshooting procedures for that DTC.

  1. Check if sparks occur.

    1. Remove the ignition coil.

    2. Remove the spark plug.

    3. Install the spark plug to the ignition coil and connect the ignition coil connector.

    4. Disconnect the 6 injector connectors.

    5. Ground the spark plug.

    6. Visually check that sparks occur while the engine is being cranked.

      NOTICE:
      1. Be sure to ground the spark plugs when checking them.
      2. If the ignition coil has been struck or dropped, replace it.
      3. Do not crank the engine for more than 2 seconds.

  1. Perform the spark test according to the flowchart below.

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

      Result:
      Result
      		Proceed to
      NG
      		Connect securely
      OK
      		Go to next step

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

      1. 1. Replace the ignition coil with igniter with a normal one.
      2. 2. Perform the spark test again.

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

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

      1. 1. Turn the engine switch on (IG).
      2. 2. Check that there is battery voltage at the ignition coil positive (+) terminal.

        Result:
        Result
        		Proceed to
        NG
        		Check wiring between engine switch and ignition coil with igniter
        OK
        		Go to next step

    4. Check the VVT sensor output voltage.

      Result:
      Result
      		Proceed to
      NG
      		Check that there is resistance between ECM and VVT sensor. If there is no resistance, replace VVT sensor. If there is resistance, repair wiring between VVT sensor and ECM
      OK
      		Go to next step

    5. Check the resistance of the crankshaft position sensor.

      Standard resistance:
      Temperature
      		Specified Condition
      Cold
      		1,630 to 2,740 Ω
      Hot
      		2,065 to 3,225 Ω

      Result:
      Result
      		Proceed to
      NG
      		Replace crankshaft position sensor
      OK
      		Go to next step

    6. Check the IGT signal from the ECM.

      Result:
      Result
      		Proceed to
      NG
      		Check ECM
      OK
      		Repair wiring between ignition coil and ECM

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

    Torque:
    18 N*m{ 183 kgf*cm , 13 ft.*lbf }

  1. Install the ignition coils.



2. CHECK VVT SENSOR OUTPUT VOLTAGE



A108550E02

  1. Turn the engine switch on (IG).

  1. Check the voltage between the terminal.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E8-29 (VC) - Body ground
    		Engine switch on (IG)
    		5 V

  1. 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 shown in the table below.

    Standard voltage:

    Sensor Position
    		Terminal No.
    		Voltage (Hi)
    		Voltage (Lo)
    Bank 1
    		VVT1+ (E8-21) - VVT1- (E8-20)
    		3.375 to 4.950 V
    		0.450 to 1.375 V
    Bank 2
    		VVT2+ (E8-19) - VVT2- (E8-18)
    		3.375 to 4.950 V
    		0.450 to 1.375 V



3. CHECK SPARK PLUG

NOTICE:
  1. Do not use a wire brush for cleaning.
  2. Do not attempt to adjust the electrode gap of a used spark plug.



    I039522E03

  1. Check the electrode.

    1. Using a megohmmeter, measure the insulation resistance.

      Insulation resistance:
      10 MΩ or more

      HINT:
      If a megohmmeter is not available, perform the following simple inspection instead.



    A110471

  1. Alternative inspection method:

    1. Quickly accelerate the engine to 4,000 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.

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

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

    Recommended spark plug:
    DENSO made
    		FK20HBR11
    NGK made
    		ILFR6D11T



    A078640E01

  1. Check the spark plug electrode gap.

    Maximum electrode gap for used spark plug:
    1.3 mm (0.051 in.)

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

    Electrode gap for new spark plug:
    1.0 to 1.1 mm (0.039 to 0.043 in.)

    NOTICE:
    When adjusting the gap of a new spark plug, bend only the base of the ground electrode. Do not touch the tip. Never attempt to adjust the gap of a used plug.