IGNITION SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. PERFORM SPARK TEST

    CAUTION:


    • B008K5O

      When working near the engine room while the engine has started or the power source mode is ignition switch to ON (IG), do not touch the fan and generator V belt or rotating components such as the fan, etc.

    • Touching the fan and generator V belt or rotating components such as the fan, etc. could result in your hand or clothing getting caught and pulled in.

    • A001TVG

      When the engine is hot, do not touch high-temperature areas such as the engine or exhaust manifold.

    • Touching high-temperature areas such as the engine and exhaust manifold could result in burns.

    Tech Tips

    Perform "Inspection After Repair" after replacing a spark plug or ignition coil assembly.

    Click here


    1. Check for DTCs.

      Click here

      Note

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

    2. Remove the 4 ignition coil assemblies and 4 spark plugs.

      Click here

      Note


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

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

      Tech Tips

      Arrange the removed parts in the correct order.

    3. A001X4L

      Disconnect the 4 fuel injector assembly connectors.

      Note

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

    4. A001SWM

      Install the spark plug into the ignition coil assembly, and then connect the ignition coil assembly 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 an ignition coil assembly has been struck or dropped, replace it.

    7. If spark does not occur, perform the following procedure.

    8. Connect the 4 fuel injector assembly connectors.

    9. Install the 4 spark plugs and 4 ignition coil assemblies.

      Click here

      Note


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

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

      Tech Tips

      Install the same parts to their original positions.

    10. Check for DTCs.

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    11. Clear the DTCs.

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  2. INSPECT IGNITION COIL ASSEMBLY AND SPARK TEST

    CAUTION:


    • B008K5O

      When working near the engine room while the engine has started or the power source mode is ignition switch to ON (IG), do not touch the fan and generator V belt or rotating components such as the fan, etc.

    • Touching the fan and generator V belt or rotating components such as the fan, etc. could result in your hand or clothing getting caught and pulled in.

    • A001TVG

      When the engine is hot, do not touch high-temperature areas such as the engine or exhaust manifold.

    • Touching high-temperature areas such as the engine and exhaust manifold could result in burns.

    Tech Tips

    Perform "Inspection After Repair" after replacing a spark plug or ignition coil assembly.

    Click here


    1. Check that the ignition coil assembly connector is securely connected.

      Result
      Result Action
      NG Connect securely
      OK Go to next step

    2. Perform a spark test on each ignition coil assembly.


      1. Replace the ignition coil assembly with a known good one.

      2. Perform the spark test again.

        Result
        Result Action
        NG Go to next step
        OK Replace ignition coil assembly

    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

        Click here

        OK Replace spark plug

        Note


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

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

    4. Connect the 4 fuel injector assembly connectors.

    5. Install the 4 spark plugs and 4 ignition coil assemblies.

      Click here

      Note


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

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

      Tech Tips

      Install the same parts to their original positions.

    6. Check for DTCs.

      Click here

    7. Clear the DTCs.

      Click here

  3. INSPECT SPARK PLUG

    CAUTION:


    • B008K5O

      When working near the engine room while the engine has started or the power source mode is ignition switch to ON (IG), do not touch the fan and generator V belt or rotating components such as the fan, etc.

    • Touching the fan and generator V belt or rotating components such as the fan, etc. could result in your hand or clothing getting caught and pulled in.

    • A001TVG

      When the engine is hot, do not touch high-temperature areas such as the engine or exhaust manifold.

    • Touching high-temperature areas such as the engine and exhaust manifold could result in burns.

    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.

    • Do not use a wire brush for cleaning.

    Tech Tips

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

    Click here


    1. A001UEDC01
      *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

        Tech Tips

        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, P0304 (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, P0304 (Cylinder Misfire Detected).

      3. Remove the spark plug.

        Click here

      4. Visually check the spark plug.

        Tech Tips

        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. A001URQC06
      *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. Install the spark plug.

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  4. PERFORM INITIALIZATION


    1. Perform "Inspection After Repair" after replacing a spark plug or ignition coil assembly.

      Click here