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)

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Voltage Signal: Description and Operation

Distributor:

The "G" signal (crank angle) detects #1 cylinder TDC and is utilized by the ECU to calculate fuel injection timing. This system utilizes two separate pick-up coils; one generates the "G" signal and the other is integral with the igniter to trigger the coil.

To determine engine speed (rpm) necessary for various functions, the ECU receives a signal (pulse) from the ignition coil negative terminal.