Ignition Coil: Testing and Inspection

ON-VEHICLE INSPECTION

NOTE: In this section, the terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10 to 50 degree C (14 to 122 degree F). "Hot" means approximately 50 to 100 degree C (122 to 212 degree F).

PERFORM SPARK TEST

a. Check for DTCs.

NOTE: If a DTC is present, perform troubleshooting procedures for that DTC.

b. Check if sparks occur.
1. Remove the ignition coil.
2. Remove the spark plug.
3. Install the spark plug to the ignition coil and connect the ignition coil connector.
4. Disconnect the 4 injector connectors.
5. Ground the spark plug.
6. Visually check that sparks occur while the engine is being cranked.

NOTE:
- Be sure to ground the spark plug when checking.
- If the ignition coil has been struck or dropped, replace it.
- Do not crank the engine for more than 2 seconds.

c. Spark test flow chart.




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




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




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







4. Check resistance of camshaft position sensor.







5. Check resistance of crankshaft position sensor.




6. Check IGT signal from ECM.

d. Using a 16 mm plug wrench, install the spark plug.

Torque: 18 N.m (183 kgf.cm, 13 ft.lbf)

e. Install the ignition coil.

Torque: 9.0 N.m (92 kgf.cm, 80 in.lbf)