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).
- "Hot" is from 50°C (122°F) to 100°C (212°F).

1. DISCONNECT HIGH -TENSION CORDS FROM IGNITION COILS.



- Using a screwdriver, lift up the lock claw and disconnect the holder from the ignition coils.
- Disconnect the high-tension cord at the grommet.
- Do not pull on the cord.

NOTICE:
- Pulling on or bending the cords may damage the conductor inside.
- Do not wipe any of the oil from the grommet after the high-tension cord is disconnected.

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 Ohm
Hot: 13.1 - 17.5 K Ohm

- If the resistance is not as specified, replace the ignition coil.

5. RECONNECT IGNITION COIL CONNECTORS.
6. RECONNECT HIGH-TENSION CORDS TO IGNITION COILS.