IGNITION SYSTEM > ON-VEHICLE INSPECTION

for Preparation Click here


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



1. CHECK IGNITION COIL ASSEMBLY AND PERFORM SPARK TEST

  1. Check for DTCs.

    NOTICE:
    If any DTC is present, perform troubleshooting in accordance with the procedure for that DTC.

  1. Check that sparks occur.

    1. Remove the ignition coils.

    2. Using a 16 mm plug wrench, remove the spark plugs.

    3. Install the spark plugs to each ignition coil, and connect the ignition coil connectors.

    4. Disconnect the 6 injector connectors.

    5. Ground the spark plugs.

    6. Check if sparks occur at each spark plug while the engine is being cranked.

      NOTICE:
      1. Be sure to ground the spark plug when checking.
      1. Replace the ignition coil if it receives an impact.
      1. Do not crank the engine for more than 2 seconds.

      HINT:
      1. If spark occur, skip the spark test flowchart.
      1. If sparks do not occur, proceed to the spark test flowchart.

  1. Spark test flowchart.

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

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

    3. Check power supply to the ignition coil.
      1. Turn the ignition switch ON.
      2. Check that there is battery positive (+) voltage at the ignition coil positive (+) terminal.

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

    4. Check the resistance of the VVT sensor output voltage (see step Click here).

      Result:
      Result
      		Proceed to
      NG
      		Follow test 1
      OK
      		Go to next step

      1. Check the wiring between the VVT sensor and ECM.

      Result:
      Result
      		Proceed to
      NG
      		Repair wiring between VVT sensor and ECM
      OK
      		Replace VVT sensor

    5. Check the resistance of the crankshaft position sensor.

      Standard resistance:
      Standard Condition
      		Specified Condition
      Cold
      		1.630 to 2.740 Ω
      Hot
      		2.065 to 3.225 Ω

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

    6. Check IGT signal from the ECM (Click here).

      Result:
      Result
      		Proceed to
      NG
      		Check ECM
      (Click here)
      OK
      		Repair wiring between ignition coil and ECM

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

    Torque:
    20 N*m{ 204 kgf*cm , 13 ft.*lbf }

  1. Install the ignition coils.

    Torque:
    9.0 N*m{ 92 kgf*cm , 80 in.*lbf }



2. CHECK VVT SENSOR OUTPUT VOLTAGE

  1. Check the VVT sensor output voltage (Click here).



3. CHECK SPARK PLUG

NOTICE:
  1. Never use a wire brush for cleaning.
  1. Never attempt to adjust the electrode gap on a used spark plug.
  1. The spark plug should be replaced every 200,000 km (120,000 miles).

  1. Remove the engine cover.

  1. Remove the air cleaner.

  1. Remove the ignition coil.

  1. Remove the spark plug.



  1. Check the electrode.



      A110413E02

    1. Using a megaohmmeter, measure the insulation resistance.

      Correct insulation resistance:
      10 MΩ or more

      If the resistance is below the specified range, remove the spark plug.

      HINT:
      If an ohmmeter is not available, perform the following simple inspection.



    B001301E01

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

    Recommended spark plug:
    Manufacturer
    		Spark Plug Type
    DENSO
    		K20HR-U11
    NGK
    		LFR6C11



    A088861E04

  1. Check the spark plug electrode gap.

    Standard electrode gap:
    1.0 to 1.1 mm (0.039 to 0.043 in.)

    If the electrode gap is not within the specified range, replace the spark plug.