Ignition Coil: Testing and Inspection

IGNITION COIL

When the ignition power transistor is turned ON by a signal from the ECM, the ECM sends a signal to the ignition coil, then the primary current is shut off and a high voltage is induced in the secondary coil.

Circuit Diagram:

Harness Inspection Procedures:

INSPECT IGNITION COIL




1. Measure the primary coil resistance between terminals 1 and 2.

Standard value: 0.87 Ohms ± 10%




2. Measure the secondary coil resistance between the high-voltage terminal for the No.1 and No.4 cylinders, and between the high-voltage terminals for the No.2 and No.3 cylinders.

Standard value: 13.0 k Ohms ± 15%

CAUTION: Be sure, when measuring the resistance of the secondary Coil, to disconnect the connector of the ignition coil.