Ignition Coil: Testing and Inspection

PROCEDURE

NOTE: "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 Negative (-) Terminal Cable From Battery.

CAUTION: Work must be started after 90 seconds from the time the ignition switch is turned to the "LOCK" position and the negative (-) terminal cable is disconnected from the battery.





2. Remove V-bank Cover; Using a 5 mm hexagon wrench, remove the 2 cap nuts and V-bank cover.





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): 0.54 - 0.84 Ohms
Primary coil resistance (Hot): 0.68 - 0.98 Ohms

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

5. Reconnect Ignition Coil Connectors.





6. Reinstall V-bank Cover; Using a 5 mm hexagon wrench, install the V-bank cover with the 2 cap nuts.

NOTE: when repositioning the V-bank cover, push on the cover until a "click" is felt.

7. Reconnect Negative (-) Terminal Cable To Battery


PROCEDURE

NOTE: This is a test of the Ignition circuit. As there is no component test of the Igniter itself, a process of elimination is used to find if the Igniter is at fault.

1. Remove the ignition coil.
2. Remove the spark plug.
3. Install the spark plug to the ignition coil, and connect the ignition coil connecter.
4. Ground the spark plug.





5. Check if spark occurs while engine is being cranked.

CAUTION: To prevent gasoline from being injected from injectors during this test, crank the engine for no more than 1 - 2 seconds at time.





6. If the spark does not occur, perform the test as illustrated.