IGNITION SYSTEM ON-VEHICLE INSPECTION

PROCEDURE

1. PERFORM SPARK TEST

   
   

   1. Check for DTCs Click here.

      Note

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

   2. Remove the ignition coil assemblies and spark plugs Click here.

   3. 

      Disconnect the 4 fuel injector connectors.

   4. Set the vehicle to inspection mode Click here.(Step 3)

   5. 

      Install each spark plug into the ignition coil assembly, and then connect the ignition coil connector. (Step 4)

   6. Ground the spark plug. (Step 5)

   7. Check that spark occurs while the engine is being cranked. (Step 6)

      Tech Tips

      Repeat steps 3 to 6 for each spark plug and ignition coil assembly.

      Note

      
      

      • Be sure to ground the spark plugs when checking them.

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

        Cranking will stop if the power switch is turned off.

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

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

      Tech Tips

      If spark does not occur for any cylinder, perform the following Inspect Ignition Coil and Spark Test procedure.

   8. Install the ignition coil assemblies and spark plugs Click here.

2. INSPECT IGNITION COIL AND SPARK TEST

   
   

   1. Check that the ignition coil 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. Set the vehicle to inspection mode Click here.

      3. Perform the spark test again.

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

   3. Perform a spark test.

      
      

      1. Replace the spark plug with a known good one.

      2. Set the vehicle to inspection mode Click here.

      3. Perform the spark test again.

         Result
         Result Action OK Replace the spark plug NG Inspect the ignition system Click here

         Note

         
         

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

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

   4. 

      Connect the 4 fuel injector connectors.

   5. Install the ignition coil assemblies and spark plugs Click here.

3. INSPECT SPARK PLUG

   
   

   1. Remove the ignition coil assemblies and spark plugs Click here.

   2. 

      Text in Illustration

      *a

      Ground

      Check the electrode.

      
      

      1. Using a megohmmeter, measure the resistance.

         Standard Resistance
         10 MΩ or more

         If the result is 10 MΩ or less, clean the plug and measure the resistance again.

         Tech Tips

         If a megohmmeter is not available, perform the following simple inspection instead.

   3. 

      Alternative inspection method:

      
      

      1. Quickly accelerate the engine to approximately 2500 rpm 5 times.

      2. Remove each 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.

   4. 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	SC20HR11

   5. 

      Text in Illustration

      *a	Spark Plug Electrode Gap

      Check the spark plug electrode gap.

      Maximum Electrode Gap for Used Spark Plug
      Electrode Gap 1.3 mm (0.0512 in.)

      If the gap is greater than the maximum, replace the spark plug.

      Electrode Gap for New Spark Plug
      Electrode Gap 1.0 to 1.1 mm (0.0394 to 0.0433 in.)

   6. 

      Clean the spark plugs.

      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.

      Tech Tips

      Only use the 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.

   7. Install the ignition coil assemblies and spark plugs Click here.