Ignition System: Testing and Inspection

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

1. CHECK IGNITION COIL ASSEMBLY AND PERFORM SPARK TEST

NOTICE:
In this section, the terms "Cold" and "Hot" refer to the temperature of the sensor. "Cold" means approximately -10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C (122 to 212°F).

(a) Check the DTCs.

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

(b) Check that sparks occur.

(1) Remove the V-bank cover.

(2) Remove the intake air surge tank Removal.

(3) Remove the bolt and ignition coil.

(4) Using a 16 mm spark plug wrench, remove the spark plug.





(5) Disconnect the 6 fuel injector connectors.





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

(7) Ground the spark plug.

(8) Check that sparks occur at the spark plug while the engine is being cranked.

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

(10) Using a 16 mm plug wrench, install the spark plug.

Torque : 25 Nm (254 kgf-cm, 18 ft-lbf)

(11) Install the ignition coil with the bolt.

Torque : 10 Nm (102 kgf-cm, 7 ft-lbf)

(12) Connect the 6 fuel injector connectors.

(13) Install the intake air surge tank Installation.

(14) Install the V-bank cover.

(c) Perform troubleshooting using the spark test flowchart.

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





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

1 Replace the ignition coil with a normal one.

2 Perform the spark test again.









(3) Check the power supply to the ignition coil.

1 Disconnect the ignition coil connector.

2 Turn the ignition switch to ON.

3 Measure the voltage of the wire harness side connector.









(4) Check the resistance of the crankshaft position sensor.









(5) Check the IGT signal from the ECM.





2. CHECK SPARK PLUG





(a) Check the electrode with megohmmeter:

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

Standard insulation resistance:

10 MOhms or more

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





(b) Check the electrode without megohmmeter:

(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 the spark plug for any damage on its thread and insulator.

If there is damage, replace the spark plug.

Recommended spark plug:





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





(d) Check the spark plug electrode gap.

Maximum electrode gap for used spark plug:

1.4 mm (0.055 in.)

(e) 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.)





(f) 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.