IGNITION SYSTEM ON-VEHICLE INSPECTION

PROCEDURE

  1. PERFORM SPARK TEST

    1. Check for DTCs.

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      Note:

      If any DTCs are present, perform troubleshooting in accordance with the procedure for each DTC.

    2. Remove the 3 No. 1 ignition coils and 3 spark plugs.

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      Note:

      • If a spark plug has been struck or dropped, replace it.

      • If a No. 1 ignition coil has been struck or dropped, replace it.

      Tip:

      Arrange the removed parts in the correct order.

    3. A321684

      Disconnect the 3 fuel injector assembly connectors.

    4. A321685

      Install the spark plug to the No. 1 ignition coil, and then connect the No. 1 ignition coil connector.

    5. Ground the spark plug.

    6. 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.

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

      • If a spark plug has been struck or dropped, replace it.

      • If a No. 1 ignition coil has been struck or dropped, replace it.

      Tip:

      If spark does not occur, perform the following procedure.

    7. Connect the 3 fuel injector assembly connectors.

    8. Install the 3 spark plugs and 3 No. 1 ignition coils.

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      Note:

      • If a spark plug has been struck or dropped, replace it.

      • If a No. 1 ignition coil has been struck or dropped, replace it.

      Tip:

      Install the same parts to their original positions.

    9. Check for DTCs.

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    10. Clear the DTCs.

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  2. INSPECT IGNITION COIL AND SPARK TEST

    1. Check that the No. 1 ignition coil connector is securely connected.

      Result

      Result

      Action

      NG

      Connect securely

      OK

      Go to next step

    2. Perform a spark test on each No. 1 ignition coil.

      1. Replace the No. 1 ignition coil with a known good one.

      2. Perform the spark test again.

        Result

        Result

        Action

        NG

        Go to next step

        OK

        Replace No. 1 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

        Action

        NG

        Inspect ignition system

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        OK

        Replace spark plug
        Note:

        • If a spark plug has been struck or dropped, replace it.

        • If a No. 1 ignition coil has been struck or dropped, replace it.

    4. Connect the 3 fuel injector assembly connectors.

    5. Install the 3 spark plugs and 3 No. 1 ignition coils.

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      Note:

      • If a spark plug has been struck or dropped, replace it.

      • If a No. 1 ignition coil has been struck or dropped, replace it.

      Tip:

      Install the same parts to their original positions.

    6. Check for DTCs.

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    7. Clear the DTCs.

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  3. INSPECT SPARK PLUG

    Note:

    • Do not use a wire brush for cleaning.

    • Never attempt to adjust the electrode gap of a used spark plug.

    1. I039522C06

      *a

      Body Ground

      Check the electrode.

      1. Using a megohmmeter, measure the insulation resistance.

        Standard Insulation Resistance

        Tester Connection

        Condition

        Specified Condition

        Spark plug (terminal part) - Body ground

        Always

        10 MΩ or higher
        Tip:

        • 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. Start the engine.

        Note:

        Do not perform this step when any of the following DTCs are output: P0300, P0301, P0302, P0303 (Cylinder Misfire Detected).

      2. Quickly accelerate the engine to 4000 rpm 5 times.

        Note:

        Do not perform this step when any of the following DTCs are output: P0300, P0301, P0302, P0303 (Cylinder Misfire Detected).

      3. Remove the spark plug.

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      4. Visually check the spark plug.

        Tip:

        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 threads and insulator.

      If there is any damage, replace the spark plug.

      Recommended Spark Plug

      Manufacturer

      Spark Plug Type

      DENSO

      SC16HR11
    4. A126880C06

      *a

      Spark Plug Electrode Gap

      Check the spark plug electrode gap.

      Maximum Electrode Gap for Used Spark Plug

      1.3 mm (0.0512 in.)

      Note:

      Never attempt to adjust the electrode gap of a used spark plug.

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

      Electrode Gap for New Spark Plug

      1.0 to 1.1 mm (0.0394 to 0.0433 in.)

    5. A296690

      Clean the spark plug.

      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 (6.0 kgf/cm2, 85 psi)

      Standard Duration

      20 seconds or less

      Tip:

      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.

    6. Install the spark plug.

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