Ignition Coil: Testing and Inspection

IGNITION COILS 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 HIGH-TENSION CORDS FROM IGNITION COILS
2. DISCONNECT IGNITION COIL CONNECTORS
3. INSPECT PRIMARY COIL RESISTANCE





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

Primary coil resistance:
Cold: 0.70 - 0.94 ohms
Hot: 0.85 - 1.10 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 terminal.

Secondary coil resistance:
Cold: 10.8 - 14.9 K ohms
Hot: 13.1 - 17.5 K ohms

If the resistance is not as specified, replace the ignition coil.
5. RECONNECT IGNITION COIL CONNECTORS
6. RECONNECT HIGH-TENSION CORDS TO IGNITION COILS