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 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: 0.67 - 1.05 Ohms
Hot: 0.85 - 1.23 Ohms

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

(See ignition coils removal)





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

Secondary coil resistance
Cold: 9.3 - 16.0 Kohms
Hot: 11.7 - 18.8 Kohms

- If the resistance is not as specified, replace the ignition coil.
6. INSTALL IGNITION COILS

(See ignition coil installation)

7. RECONNECT IGNITION COIL CONNECTORS
8. RECONNECT HIGH-TENSION CORDS FROM IGNITION COILS