Ignition Coil: Testing and Inspection

IGNITION COIL INSPECTION[L3, AJ]

L3
Ignition coil inspection
1. Perform the spark test and identity the malfunctioning cylinder.
2. Replace the ignition coil of the malfunctioning cylinder with that of a normal cylinder, and reperform the spark test.
- If the spark is not normal due to a malfunctioning ignition coil, replace that ignition coil.
- It is unlikely that all four ignition coils fail to operate properly. To prevent replacing a normal component, perform the above procedure, identify the malfunctioning ignition coil, and replace it.

Ignition coil with built-in igniter inspection
1. Disconnect the ignition coil connector.




2. Measure the resistance between each terminal on the ignition coil connector using an analog circuit tester.
- If the measurement corresponds to the table, replace the ignition coil.

AJ
Primary coil winding
1. Disconnect the ignition coil connector.




2. Measure the resistance between terminal A and B using a tester.
- If not within the specification, replace the ignition coil.

Specification: 0.45-1.15 ohms {25 °C {77 °F)]

Secondary coil winding
1. Remove the ignition coil.




2. Measure the resistance between terminal A to ignition coil boot socket using a tester.
- If not within the specification, replace the ignition coil.

Specification: 5.0-6.0 kohms [25 °C (77 °F}]

Insulation resistance of case
1. Disconnect the ignition coil connector.




2. Measure the insulation resistance between terminal A to ignition coil case using a tester.
- If not as specified, replace the ignition coil.

Specification: 10 megohms or more