Ignition System: Testing and Inspection

2ZR-FXE ENGINE CONTROL: IGNITION SYSTEM: ON-VEHICLE INSPECTION

1. CHECK IGNITION COIL ASSEMBLY AND PERFORM SPARK TEST

(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

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

(b) Check that spark occurs.

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

(2) Disconnect the 4 fuel injector connectors.





(3) Set the vehicle to inspection mode Component Tests and General Diagnostics.

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





(5) Ground the spark plug. (Step 5)

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

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

NOTICE:
* Ground the spark plugs when checking them.
* Replace any ignition coils that have been subjected to any physical impacts.
* Do not crank the engine for more than 2 seconds.

If spark does not occur, perform the following procedure for the malfunctioning cylinder.

(c) Perform the following spark test procedure.

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

Result:





(2) Perform a spark test.

1 Replace the ignition coil with a known good one.

2 Set the vehicle to inspection mode Component Tests and General Diagnostics.

3 Perform the spark test again.

Result:





(3) Perform a spark test.

1 Replace the spark plug with a known good one.

2 Set the vehicle to inspection mode Component Tests and General Diagnostics.

3 Perform the spark test again.

Result:





(4) Check the power supply.





Text in Illustration





1 Turn the power switch on (IG).

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

Standard Voltage:





Result:





(5) Connect the 4 fuel injector connectors.





(6) Install the ignition coils and spark plugs Installation.

2. INSPECT SPARK PLUG

(a) Check the electrode.





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(1) Using a megohmmeter, measure the resistance.

Standard Resistance:

10 MOhms or more

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

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

(b) 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.

(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) Check the spark plug electrode gap.





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Maximum Electrode Gap for Used Spark Plug:





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

Electrode Gap for New Spark Plug:





(e) 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.

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.