Ignition System On-Vehicle Inspection

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
1Az-Fe Ignition. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

  1. CHECK IGNITION COIL ASSEMBLY AND PERFORM SPARK TEST

  2. CHECK SPARK PLUG

Ignition System -- On-Vehicle Inspection


HINT:
The type of ignition switch on this model differs according to the specifications of the vehicle. For the expressions used in this section, refer to the "EXPRESSIONS OF IGNITION SWITCH" precaution (RAV4_ACA30 RM00000215G00HX.html).


1. CHECK IGNITION COIL ASSEMBLY AND PERFORM SPARK TEST
NOTICE:
In this section, the terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C (122 to 212°F).

  1. Check the DTCs.

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


  1. Check that sparks occur.

    1. Remove the No. 1 engine cover.

    2. Remove the bolt and ignition coil.



      3. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.1Az-Fe Ignition.Ignition System.Ignition System On-Vehicle Inspection

    3. Using a 16 mm spark plug wrench, remove the spark plug.



      4. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.1Az-Fe Ignition.Ignition System.Ignition System On-Vehicle Inspection

    4. Disconnect the 4 fuel injector connectors.



      5. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

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

    6. Ground the spark plug.

    7. Check that sparks occur at the spark plug while the engine is being cranked.

      NOTICE:
      1. Be sure to ground the spark plugs when checking them.
      2. If the ignition coil has been struck or dropped, replace it.
      3. Do not crank the engine for more than 2 seconds.
      If sparks do not occur, perform the spark test.

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

      Torque:
      25 N*m{254 kgf*cm, 18 ft.*lbf}

    9. Install the ignition coil with the bolt.

      Torque:
      9.0 N*m{92 kgf*cm, 80 in.*lbf}

    10. Connect the 4 fuel injector connectors.

    11. Install the No. 1 engine cover.



  1. Spark test flow chart.

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

      Result:
      Result
      		Proceed to
      NG
      		Connect securely
      OK
      		Go to next step

    2. Perform the spark test on each ignition coil.

      1. Replace the ignition coil with a normal one.
      2. Perform the spark test again.
      Result:
      Result
      		Proceed to
      OK
      		Replace ignition coil
      NG
      		Go to next step


      3. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

    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
      		Proceed to
      NG
      		Check wire harness and connector
      OK
      		Go to next step

    4. Check the resistance of the camshaft position sensor.

      Standard resistance:
      Temperature Condition
      		Specified Condition
      Cold
      		835 to 1,400 Ω
      Hot
      		1,060 to 1,645 Ω
      Result:
      Result
      		Proceed to
      NG
      		Replace camshaft position sensor
      OK
      		Go to next step

    5. Check the resistance of the crankshaft position sensor.

      Standard resistance:
      Temperature Condition
      		Specified Condition
      Cold
      		985 to 1,600 Ω
      Hot
      		1,265 to 1,890 Ω
      Result:
      Result
      		Proceed to
      NG
      		Replace crankshaft position sensor
      OK
      		Go to next step

    6. Check the IGT signal from the ECM.

      Result:
      Result
      		Proceed to
      NG
      		Check ECM (RAV4_ACA30 RM000000XH4096X.html)
      OK
      		Repair wiring between ignition coil and ECM


2. CHECK SPARK PLUG


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.1Az-Fe Ignition.Ignition System.Ignition System On-Vehicle Inspection

  1. Check the electrode.

    1. Using a megohmmeter, measure the insulation resistance.

      Standard insulation resistance:
      10 MΩ or more
      HINT:
      1. If a megohmmeter is not available, perform the following simple inspection instead.
      2. If the result is 10 MΩ or less, clean the plug and measure the resistance again.


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

  1. Alternative inspection method:

    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.

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

    Recommended spark plug:
    Manufacturer
    		Spark plug type
    DENSO
    		SK20R11
    NGK
    		IFR6A11


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.1Az-Fe Ignition.Ignition System.Ignition System On-Vehicle Inspection

  1. Check the spark plug electrode gap.

    Maximum electrode gap for used spark plug:
    1.3 mm (0.051 in.)
    If the gap is greater than the maximum, replace the spark plug.
    Electrode gap for new spark plug:
    1.0 to 1.1 mm (0.039 to 0.043 in.)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.1Az-Fe Ignition.Ignition System.Ignition System On-Vehicle Inspection

  1. 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 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.