Ignition System On-Vehicle Inspection

Check the DTCs.

NOTICE:

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

Check that sparks occur.

1. Remove the V-bank cover.
   





2. Disconnect the throttle body connector.
   





3. Remove the 4 bolts then separate the throttle body.
   

4. Remove the intake air surge tank (RAV4_ACA30 RM000002YO400RX.html).
   

5. Remove the bolt and ignition coil.
   

6. Using a 16 mm spark plug wrench, remove the spark plugs.
   





7. Disconnect the 6 fuel injector connectors.
   





8. Install the spark plug into the ignition coil, and then connect the ignition coil connectors.
   

9. Ground the spark plug.
   

10. Check that spark occurs at the spark plug while the engine is being cranked.
    

    NOTICE:

    1. Be sure to ground the spark plugs when checking them.
       
    2. If an ignition coil has been struck or dropped, replace it.
       
    3. Do not crank the engine for more than 2 seconds.
       
    If spark does not occur, perform the following steps.
    

11. Using a 16 mm plug wrench, install the spark plug.
    

    Torque:

    18 N*m{184 kgf*cm, 13 ft.*lbf}

12. Install the ignition coil with the bolt.
    

    Torque:

    10 N*m{102 kgf*cm, 7 ft.*lbf}

13. Connect the 6 fuel injector connectors.
    

14. Install the intake air surge tank (RAV4_ACA30 RM000002YO200RX.html).
    

15. Install the V-bank cover.
    

Perform troubleshooting using the following steps.

1. Check that the ignition coil connectors are securely connected.
   

   Result:

   Result	Action
   NG	Connect securely
   OK	Go to next step

2. Perform a spark test on each ignition coil.
   

   1. Replace the ignition coil with a known good one as necessary.
      
   2. Perform the spark test again.
      

   Result:

   Result	Action
   OK	Replace ignition coil
   NG	Go to next step





3. Check the power supply to the ignition coil.
   

   1. Disconnect the ignition coil connector.
      
   2. Turn the ignition switch on (IG).
      
   3. Measure the voltage of the wire harness side connector.
      

   Standard voltage:

   Tester Connection	Specified Condition
   1 (+B) - 4 (GND)	9 to 14 V

   Result:

   Result	Action
   NG	Check wire harness and connector
   OK	Go to next step

4. Check the resistance of the crankshaft position sensor.
   

   Standard resistance:

   Temperature Condition	Specified Condition
   Cold	1630 to 2740 Ω
   Hot	2065 to 3225 Ω

   Result:

   Result	Action
   NG	Replace crankshaft position sensor
   OK	Go to next step

5. Check the IGT signal from the ECM.
   

   Result:

   Result	Action
   NG	Check ECM (RAV4_ACA30 RM000000XH4097X.html)
   OK	Repair wiring between ignition coil and ECM

Check the electrode using a megohmmeter:

1. Using a megohmmeter, measure the insulation resistance.
   

   Standard insulation resistance:

   10 MΩ or more
   

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

Check the electrode without using a megohmmeter:

1. Quickly accelerate the engine to 4,000 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 on its threads and insulator.
If there is damage, replace the spark plug.

Recommended spark plug:

Manufacturer	Spark plug type
DENSO	FK20HR11

Check the spark plug electrode gap.

Maximum electrode gap for used spark plug:

1.4 mm (0.055 in.)

Electrode gap for new spark plug:

1.0 to 1.1 mm (0.039 to 0.043 in.)

Standard air pressure:

588 kPa (6 kgf/cm², 85 psi)

Standard 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.