Ignition Coil: Testing and Inspection

Tester J-24624 is required to test the module. If this tester is not available, and malfunction still exists after performing the following checks, replace module.

Fig. 3 Ignition coil test connections:

IGNITION COIL TEST

1. Connect ohmmeter as shown in step 1, Fig. 3, and set meter on high scale. Meter should indicate very high or infinite resistance. If not, coil is defective.
2. Connect ohmmeter as shown in step 2, Fig. 3, and set meter on low scale. Meter should indicate low or no resistance. If not, coil is defective.
3. Connect ohmmeter as shown in step 3, Fig. 3, and set meter on high scale. If meter indicates infinite resistance, coil is defective.

Fig. 4 Pickup coil test connections:

PICKUP COIL TEST

1. Remove distributor cap and rotor, and disconnect pickup coil leads from module.
2. Connect ohmmeter as shown in step 1, Fig. 4, and flex pickup coil leads while observing meter. Meter should indicate infinite resistance at all times. If not, pickup coil is defective.
3. Connect ohmmeter as shown in step 2, Fig. 4, and flex pickup coil leads while observing meter. Meter reading should remain constant between 500 and 1500 ohms. If not, replace pickup coil.