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. REMOVE AIR CLEANER HOSE
2. DISCONNECT HIGH-TENSION CORDS FROM IGNITION COILS
3. DISCONNECT IGNITION COIL CONNECTORS





4. INSPECT PRIMARY COIL RESISTANCE
Using an ohmmeter, measure the resistance between the positive (+) and negative (-) terminals.

Primary coil resistance:
Cold: 0.67 - 1.05 ohms
Hot: 0.85 - 1.23 ohm

If the resistance is not as specified, replace the ignition coil.
5. REMOVE IGNITION COILS





6. INSPECT SECONDARY COIL RESISTANCE
Using an ohmmeter, measure the resistance between the positive (+) and high-tension terminals.

Secondary coil resistance:
Cold: 9.3 - 16.0 K ohms
Hot: 11.7-18.8 K ohms

If the resistance is not as specified, replace the ignition coil.
7. REINSTALL IGNITION COILS
8. RECONNECT IGNITION COIL CONNECTORS AND HIGH-TENSION CORDS
9. REINSTALL AIR CLEANER HOSE