Ignition System: Testing and Inspection

ON-VEHICLE INSPECTION

NOTE: "Cold" and "Hot" in these sentences express the temperature of the coils themselves. "Cold" is from -10 degree C (14 degree F) to 50 degree C (122 degree F) and "Hot" is from 50 degree C (122 degree F) to 100 degree C (212 degree F).

1. INSPECT IGNITION COIL (WITH IGNITER) AND SPARK TEST
a. Check that the spark occurs.
1. Remove the ignition coils (with igniter).
2. Remove the spark plugs.
3. Install the spark plugs to each ignition coil (with igniter), and connect the ignition coil (with igniter) connector.
4. Disconnect the 8 injector connectors.
5. Ground the spark plug.
6. Check that spark occurs while engine is being cranked.

NOTE: To prevent gasoline from being injected out of injectors during this test, crank the engine for no more than 5 to 10 seconds at a time.

b. Perform the spark test according to the flowchart.




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




2. Perform a spark test on each ignition coil with igniter.
1. Replace the ignition coil with igniter with a normal one.
2. Perform the spark test again.




3. Check the power supply to the ignition coil with igniter.
1. Turn the ignition switch ON.
2. Check that there is battery voltage at the ignition coil positive (+) terminal.




4. Check the resistance of the crankshaft position sensor.




5. Check IGT signal from the ECM.

c. Using a 16 mm plug wrench, install the 8 spark plugs.

Torque: 17.5 N.m (178 kgf.cm, 13 ft.lbf)

d. Reinstall the ignition coils (with igniter).

2. INSPECT SPARK PLUGS




a. Remove the ignition coils (with igniter).
b. Using a 16 mm plug wrench, remove the spark plugs.




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

Air pressure:
Below 588 kPa (6 kgf/sq.cm, 85 psi)

Duration:
20 seconds or less

HINT: If there are traces of oil, remove it with gasoline before using the spark plug cleaner.







d. Check the spark plug for thread damage and insulator damage.

If abnormal, replace the spark plug.




e. Adjust the spark plug electrode gap.

Electrode gap for new spark plug:

1.0 to 1.1 mm (0.039 to 0.043 in.)

f. Using a 16 mm plug wrench, install the spark plugs.

Torque: 17.5 N.m (180 kgf.cm, 13 ft.lbf)

g. Reinstall the ignition coils (with igniter).