Ignition Coil: Testing and 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 FROM IGNITION COIL




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 Ohms
Hot: 0.45 - 0.65 ohms

- 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 TO IGNITION COIL
6. RECONNECT IGNITION COIL CONNECTOR