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°C (14°F) to 50°C (122°F). "Hot" means approximately 50°C (122°F) to 100°C (212°F).

INSPECT IGNITION COIL ASSEMBLY

a. Check for DTCs.

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

b. Check that sparks occur.
1. Remove the intake air surge tank.
2. Remove the No. 1 surge tank stay.




3. Disconnect the 6 ignition coil connectors and remove the 6 bolts and 6 ignition coils.




4. Using a 16 mm (0.63 in.) plug wrench, remove the 6 spark plugs.




5. Disconnect the 6 fuel injector connectors.
6. Install the spark plugs to each ignition coil, and connect the ignition coil connectors




7. Ground the spark plugs.
8. Check if a spark occurs at each spark plug while the engine is being cranked.

NOTE:
- 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.

c. Perform the spark test according to the flowchart.
1. Check that the ignition coil connector is securely connected.
2. Perform a speak 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. Turn the engine switch on (IG).
2. Measure the voltage between the terminals of the wire harness side connector.




4. Measure the resistance of the crankshaft position sensor.




5. Check the IGT signal from the ECM.




d. Using a 16 mm (0.63 in.) plug wrench, install the spark plugs.

Torque: 18 N.m (184 kgf.cm, 13 ft.lbf)




e. Install the 6 ignition coils with the 6 bolts and connect the 6 ignition coil connectors.

Torque: 10 N.m (102 kgf.cm, 7 ft.lbf)




f. Connect the 6 fuel injector connectors.
g. Install the No. 1 surge tank stay.
h. Install the intake air surge tank.