Ignition Coil: Testing and Inspection
IGNITION COILS INSPECTIONNOTICE: "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).
"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. REMOVE IGNITION COILS
5. INSPECT SECONDARY COIL RESISTANCE
- Using an ohmmeter, measure the resistance between the positive (+) and high-tension terminal.
Secondary coil resistance:
- Cold: 10.8 - 14.9k Ohms
- Hot: 13.1 - 17.5k Ohms
- If the resistance is not as specified, replace the ignition coil.
6. REINSTALL IGNITION COILS
7. RECONNECT IGNITION COIL CONNECTORS
8. RECONNECT HIGH-TENSION CORDS TO IGNITION COILS