Ignition System: Testing and Inspection

2AZ-FE ENGINE CONTROL: IGNITION SYSTEM: ON-VEHICLE INSPECTION

1. INSPECT IGNITION COIL AND PERFORM SPARK TEST

(a) Check for DTCs DTC Check / Clear.

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

(b) Check whether spark occurs.

(1) Remove the 4 ignition coils and 4 spark plugs Removal.

(2) Disconnect the 4 fuel injector connectors.





(3) Install the spark plug into the ignition coil and connect the ignition coil connector.





(4) Ground the spark plug.

(5) Check that spark occurs while the engine is being cranked.

NOTICE:
* Ground the spark plug when checking it.
* Replace any ignition coils that have been subjected to any physical impact.
* Do not crank the engine for more than 2 seconds.
(6) If spark does not occur, perform the following procedure.

(c) Perform the following spark test procedure.

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

Result:





(2) Perform the spark test on each ignition coil with igniter.

1 Replace the ignition coil with igniter with a known good one.

2 Perform the spark test again.

Result:





(3) Check the spark plug.

1 Replace the spark plug with a known good one.

2 Perform the spark test again.

Result:





(4) Check that power is supplied to each ignition coil with igniter.





1 Disconnect each ignition coil connector.

2 Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):





HINT
Perform the same procedure for each ignition coil.

3 Turn the ignition switch to ON.

4 Measure the voltage according to the value(s) in the table below.

Standard Voltage:





HINT
Perform the same procedure for each ignition coil.

Result:





(5) Check the resistance of the crankshaft position sensor Testing and Inspection.

Result:





(6) Check the IGT signals from the ECM P0351.

Result:





(d) Connect the 4 injector connectors.





(e) Install the 4 ignition coils and 4 spark plugs Installation.

2. INSPECT SPARK PLUG

NOTICE:
* Do not use a wire brush for cleaning.
* Do not attempt to adjust the electrode gap of a used spark plug.
(a) Check the electrode.





(1) Using a megohmmeter, measure the insulation resistance.

Standard Resistance:

10 MOhms or more

HINT
* If the result is not as specified, clean the spark plug with a spark plug cleaner and measure the resistance again.
* If a megohmmeter is not available, perform the following simple inspection instead.
(b) Alternative inspection method:

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

(2) Remove the spark plug Removal.

(3) Visually check the spark plug.





(4) If the electrode is dry, the spark plug is functioning properly. If the electrode is damp, proceed to the next step.

(c) Check the spark plug for any damage to its threads and insulator.

If there is any damage, replace the spark plug.

Recommended Spark Plug:





(d) Reference:





Maximum Electrode Gap for Used Spark Plug:





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

Electrode Gap for New Spark Plug:





(f) 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 (6.0 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.