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 4 No. 1 ignition coils and 4 spark plugs.

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      Note:

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

      Tip:

      Arrange the removed parts in the correct order.

    3. A352531

      Disconnect the No. 4 engine wire connector.

      Note:

      Perform this step in order to stop fuel injection to prevent damage to the catalyst due to unburned fuel.

    4. A353370

      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 No. 1 ignition coil or spark plug has been struck or dropped, replace it.

      Tip:

      If spark does not occur, perform the following procedure.

    7. Connect the No. 4 engine wire connector.

    8. Install the 4 No. 1 ignition coils and 4 spark plugs.

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      Note:

      If a No. 1 ignition coil or spark plug 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 NO. 1 IGNITION COIL AND SPARK TEST

    Tip:

    Perform "Inspection After Repair" after replacing a No. 1 ignition coil or spark plug.

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    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 No. 1 ignition coil or spark plug has been struck or dropped, replace it.

    4. Connect the No. 4 engine wire connector.

    5. Install the 4 No. 1 ignition coils and 4 spark plugs.

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      Note:

      If a No. 1 ignition coil or spark plug 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. CHECK SPARK PLUG

    Note:

    • Do not damage the iridium tip and platinum tip.

    • Check the iridium tip visually since the iridium tip may be damaged.

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

    • Replace with new spark plugs if extremely dirty due to sludge, etc.

    • Replace with new spark plugs if damaged at all.

    • Replace with a new spark plug if it has been struck or dropped.

    • When replacing with a new spark plug, do not remove the cap for protecting the spark plug tip until it is installed to the engine.

    Tip:

    Perform "Inspection After Repair" after replacing a spark plug.

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    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: P030000, P030027, P030085, P030100, P030200, P030300, P030400 (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: P030000, P030027, P030085, P030100, P030200, P030300, P030400 (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

      NGK

      DILKAR8J9G
    4. A260264C04

      *a

      Spark Plug Electrode Gap

      Check the spark plug electrode gap.

      Maximum Electrode Gap for Used Spark Plug

      1.1 mm (0.0433 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.

      Standard Electrode Gap for New Spark Plug

      0.8 to 0.9 mm (0.0315 to 0.0354 in.)

    5. Install the spark plug.

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  4. PERFORM INITIALIZATION

    1. Perform "Inspection After Repair" after replacing a No. 1 ignition coil or spark plug.

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