IGNITION SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. PERFORM SPARK TEST

    CAUTION:


    • A004AW3

      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.

    • A004A49

      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.

    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. A0048BN

      Disconnect the engine wire connector.

      Note

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

    3. Remove the 4 No. 1 ignition coils and 4 spark plugs.

      Click here

      Note

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

      Tech Tips

      Arrange the removed parts in the correct order.

    4. A004AW2

      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.

        - For vehicles with a cranking hold function, turn the ignition switch off during cranking to stop cranking.

      • Perform spark tests for all cylinders.

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

      Tech Tips

      If spark does not occur, perform the following procedure.

    7. Connect the engine wire connector.

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

      Click here

      Note

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

      Tech Tips

      Install the same parts to their original positions.

    9. Check for DTCs.

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    10. Clear the DTCs.

      Click here

  2. INSPECT NO. 1 IGNITION COIL AND SPARK TEST

    CAUTION:


    • A004AW3

      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.


    • A004A49

      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 No. 1 ignition coil or spark plug.

    Click here


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

      Result
      Result Action
      OK Go to next step
      NG Connect securely

    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
        OK

        Replace ignition coil assembly

        Click here

        NG Go to next step

        Note

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

    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
        OK

        Replace spark plug

        Click here

        NG

        Inspect ignition system

        Click here

        Note

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

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

      Note

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

      Tech Tips

      Install the same parts to their original positions.

    5. Check for DTCs.

      Click here

    6. Clear the DTCs.

      Click here

  3. CHECK SPARK PLUG

    CAUTION:


    • A004AW3

      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.


    • A004A49

      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


    • Be careful not to damage the iridium tip or platinum tip of the spark plug.

    • Check the iridium tip visually as it is easily damaged.

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

    • If the spark plug is extremely dirty with oil, etc., replace it.

    • Replace a spark plug if it is damaged at all.

    • When installing a new spark plug, do not remove the protective cap from the spark plug tip until just before installing the spark plug to the engine.

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

    Tech Tips

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

    Click here


    1. A004BJ0C06
      *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: 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.

        Click here

      4. A004A1P

        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 FC16HR-Q8
    4. A0047CRC16
      *a Spark Plug Electrode Gap

      Check the spark plug electrode gap.

      Maximum Electrode Gap for Used Spark Plug
      1.2 mm (0.0472 in.)

      Note

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

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

      Standard Electrode Gap for New Spark Plug
      0.7 to 0.8 mm (0.0276 to 0.0315 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.

      Click here