Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Ignition Coil: Testing and Inspection





1. Measurement of the primary coil resistance.
Measure the resistance between connector terminals 3 and 1 (the coils at the No.1 and No.4 cylinder sides) of the ignition coil and between terminals 3 and 2 (the coils at the No.2 and No.3 cylinder sides).

Standard value: 0.5 ± 0.05 K Ohms





2. Measurement of the secondary coil resistance.
Measure the 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: 12.1 ± 1.8 K Ohms

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