Ignition System: Testing and Inspection

2GR-FE IGNITION: IGNITION SYSTEM: ON-VEHICLE INSPECTION

1. INSPECT IGNITION COIL ASSEMBLY

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

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

(b) Check that spark occurs.

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

(2) Disconnect the 6 fuel injector connectors.





(3) Install the spark plug into the ignition coil, and then connect the ignition coil connectors (step 3).

(4) Ground the spark plug (step 4).





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

NOTICE:
* Be sure to ground the spark plugs when checking.
* Replace the ignition coil if it receives an impact.
* Do not crank the engine for more than 2 seconds.

HINT
* Repeat steps 3 - 5 for each spark plug and ignition coil.
* 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 Perform the spark test again.

Result:





(3) Perform a spark test.

1 Replace the spark plug with a known good one.

2 Perform the spark test again.

Result:





(4) Check the power supply.





1 Turn the engine switch on (IG).

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

Standard Voltage:





Result:





(d) Connect the 6 fuel injector connectors.





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

(f) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

2. INSPECT SPARK PLUG

NOTICE:
* Never use a wire brush for cleaning.
* Never attempt to adjust the electrode gap on a used spark plug.

(a) Check the electrode.





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

Standard insulation resistance:

10 MOhms or higher

HINT
* If the result is 10 MOhms or less, clean the plug 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 4,000 rpm 5 times.

(2) Remove the spark plugs.

(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 damage, replace the spark plug.

Require spark plug:





NOTICE:
Use only the listed spark plug or equivalent to ensure engine performance and smooth driveability.

(d) Check the spark plug electrode gap.





Maximum electrode gap for a used spark plug:

1.4 mm (0.055 in.)

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

Electrode gap for a new spark plug:

1.0 to 1.1 mm (0.039 to 0.043 in.)

(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 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.