Ignition System On-Vehicle Inspection

Check for DTCs (RAV4_ACA30 RM000000PDK0BLX.html).

NOTICE:

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

Check whether sparks occur.

1. Remove the 4 ignition coils and 4 spark plugs (RAV4_ACA30 RM000002YO400WX.html).
   





2. Disconnect the 4 injector connectors.
   





3. Install the spark plug onto each ignition coil and connect the ignition coil connectors.
   

4. Ground the spark plug.
   

5. Check that sparks occur while the engine is being cranked.
   

   NOTICE:

   1. Ground the spark plug when checking it.
      
   2. Replace any ignition coils that have been subjected to any physical impact.
      
   3. Do not crank the engine for more than 2 seconds.
      
   If sparks do not occur, perform the following procedure.
   

Perform the spark test in accordance with the following procedure.

1. Check that the wire harness side connector of the ignition coil with igniter is securely connected.
   

   Result

   Result	Proceed to
   NG	Connect securely
   OK	Go to next step

2. Perform a spark test on each ignition coil with igniter.
   

   1. Replace the ignition coil with igniter with a functioning one.
      
   2. Perform the spark test again.
      

   Result

   Result	Proceed to
   OK	Replace ignition coil with igniter
   NG	Go to next step

3. Check the spark plug.
   

   Result

   Result	Proceed to
   NG	Replace spark plug
   OK	Go to next step

4. Check that power is supplied to the ignition coil with igniter.
   

   1. Turn the ignition switch to ON.
      
   2. Check that battery voltage is applied to the positive (+) terminal of the ignition coil.
      

   Result

   Result	Proceed to
   NG	Check wiring between ignition switch and ignition coil with igniter
   OK	Go to next step

5. Check the camshaft position sensor (RAV4_ACA30 RM000000WBZ066X.html).
   

6. Check the crankshaft position sensor (RAV4_ACA30 RM000000TCW0B4X.html).
   

7. Check the IGT signal circuit (RAV4_ACA30 RM000000XH409XX.html).
   

Connect the 4 injector connectors.

Install the 4 ignition coils and 4 spark plugs (RAV4_ACA30 RM000002YO200WX.html).

Check the electrode.

1. Using a megohmmeter, measure the insulation resistance.
   

   Standard resistance:

   10 MΩ or higher
   

   Text in Illustration

   *1

   Ground

   If the result is not as specified, clean the spark plug with a spark plug cleaner and measure the resistance again.
   

   HINT:

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

Alternative inspection method:

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

2. Remove the 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.
   

Check the spark plug for any damage to its thread and insulator.
If there is any damage, replace the spark plug.

Recommended Spark Plug:

Manufacturer	Product
DENSO	SC20HR11

Reference:

1. Check the spark plug electrode gap.
   

   Maximum electrode gap for used spark plug:

   1.3 mm (0.0512 in.)
   

   If the 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.)
   

Clean the spark plug.
If the electrode has traces of wet carbon, clean the electrode with a spark plug cleaner and then dry it.

Air pressure:

588 kPa (6 kgf/cm², 85 psi)

Duration:

20 seconds or less

HINT:

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.