Ignition Coil: Testing and Inspection

To perform a complete test of the 8 ignition coils and their circuitry, refer to the DRB scan tool. Also refer to the appropriate Powertrain Diagnostics Procedures. To do an individual test of the coil only, refer to the following:

Inspect the ignition coil for cracks and for any arcing. Arcing at the secondary end will carbonize the rubber spark plug boot, which if it is reconnected, may cause the coil to fail. Replace coil if any cracks or arcing is found.

Ignition Coil:

Test the resistance (in ohms) of the primary side of the coil by attaching an ohmmeter across the two pins at the electrical connector end of the coil. Refer to the IGNITION COIL RESISTANCE chart for resistance values. Replace coil if resistance values are incorrect.

Test the resistance (in ohms) of the secondary side of the coil by attaching an ohmmeter from either of the two primary pins to the spring inside the rubber boot at the spark plug opening. Refer to the IGNITION COIL RESISTANCE chart for resistance values. Replace coil if resistance values are incorrect.

IGNITION COIL RESISTANCE
Primary resistance at 21-27°C (70-80°F) = 0.6 - 0.9 Ohms
Secondary resistance at 21-27°C (70-80°F) = 6,000 - 9,000 Ohms