IGNITION COIL INSPECTION [LF, L3]

Ignition Coil Inspection

Note

• It is unlikely that all four ignition coils fail to operate properly. To prevent replacing a normal component, perform the following procedure, identify the malfunctioning ignition coil, and replace it.

1. Perform the spark test and identify the malfunctioning cylinder. (See NO.27 SPARK PLUG CONDITION [LF, L3].)

2. Replace the ignition coil of the malfunctioning cylinder with that of a normal cylinder, and reperform the spark test. (See NO.27 SPARK PLUG CONDITION [LF, L3].)

• If the spark is not normal due to a malfunctioning ignition coil, replace that ignition coil.

Resistance Inspection

Primary Coil Winding

1. Disconnect the ignition coil connector.

2. Measure the resistance between the following terminals using an ohmmeter:

• A and B

- If not within the specification, replace the ignition coil.

Resistance (Reference)

0.45-1.15 ohms [25 °C {77 °F}]

Secondary Coil Winding

1. Disconnect the ignition coil connector.

2. Remove the ignition coil. (See IGNITION COIL REMOVAL/INSTALLATION [LF, L3].)

3. Measure the resistance between the following using an ohmmeter:

• Terminal A to coil boot socket

- If not within the specification, replace the ignition coil.

Resistance (Reference)

5.0-6.0 kilohms [25 °C {77 °F}]

Insulation Resistance of Case

1. Disconnect the ignition coil connector.

2. Measure the insulation resistance from terminal A to ignition coil case using an ohmmeter.

• If it is less than the specification, replace the ignition coil.

Resistance (Reference)

10 megohms [25 °C {77 °F}]