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

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Component Tests and General Diagnostics








ON-VEHICLE INSPECTION

INSPECT IGNITION COIL
1. Measure the primary coil resistance between terminals (ECU) and battery (+).

Standard : 0.715Ohms ± 15%





NOTE:
Measure the resistance between the terminals No.1 and No.2.