Ignition System: Testing and Inspection

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

1. PERFORM SPARK TEST

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

NOTICE:
If any DTC is present, perform troubleshooting procedures for that DTC.

(b) Check that spark occurs.

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

(2) Disconnect the 4 injector connectors.





(3) Disconnect the 2 injector driver connectors by the following procedures: 1) move the lock lever in the direction indicated by the arrow to release the connector lock, then 2) disconnect the connectors with wire harness lock.





(4) Install the spark plug into the ignition coil, and then connect the ignition coil connectors (step 4).

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





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

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

HINT
* Repeat steps 4 - 6 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 with igniter connector is securely connected.

Result:





(2) Perform a spark test.

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

Perform the spark test again.

Result:





(3) Perform a spark test.

Replace the spark plug with a known good one.

Perform the spark test again.

Result:





(4) Check the power supply.

Turn the engine switch on (IG).

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





Standard Voltage:





Result:





(d) Connect the 2 injector driver connectors by the following procedures: 1) connect the connectors with wire harness lock, then 2) move the lock lever in the direction indicated by the arrow to lock the connector.





(e) Connect the 4 injector connectors.





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

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

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 insulation resistance:

10 MOhms or more

HINT
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 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 for damage to the spark plug threads and insulated area.





NOTICE:
* Do not damage the iridium or platinum chip areas.
* If the spark plug is very dirty as a result of combustion, etc., replace it.
* If replacing the spark plug with a new one, do not remove the new spark plug's protective cap until immediately before installing it.
* If the spark plug is dropped, replace it.

If there is any damage, replace the spark plug.

Recommended spark plug:





(d) Reference:





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.)





NOTICE:
Never attempt to adjust the gap of a plug.

If the electrode has traces of wet carbon, allow it to dry and then clean with a spark plug cleaner.

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.