Diesel Data: Automotive Repair

Ignition Coil: Testing and Inspection


1. Connect one end of an ohmmeter to the (-) side of the ignition coil. Connect the other end to the (+) side of the ignition coil.

Primary Coil Test:






Primary Resistance (Cold): 0.40 - 0.50 ohms

2. Connect one end of an ohmmeter to the high tension terminal of the ignition coil. Connect the other end of the ohmmeter to the (+) side of the ignition coil.

Secondary Coil Test:






Secondary Resistance (Cold): 10.2k - 13.8k ohms

3. If Primary or Secondary coil resistance value is not within specifications, replace ignition coil. For further information refer to SPARK TEST.