Ignition Coil: Testing and Inspection

IGNITION COIL INSPECTION

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

1. Disconnect ignition coil connector.
2. Disconnect high-tension cord.
3. Inspect primary coil resistance.




Using an ohmmeter, measure the resistance between the positive (+) and negative (-) terminals.

Primary coil resistance:
Cold: 0.36-0.55 ohm
Hot: 0.45-0.65 ohm

If the resistance is not as specified, replace the ignition coil.
4. Inspect secondary coil resistance.




Using an ohmmeter, measure the resistance between the positive (+) and high-tension terminals.

Secondary coil resistance:
Cold: 9.0 - 15.4 K ohms
Hot: 11.4 - 18.1 K ohms

If the resistance is not as specified, replace the ignition coil.
5. Reconnect high-tension cord.
6. Reconnect ignition coil connector.