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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Cranking Signal: Description and Operation

Starter Switch Signal:





PURPOSE

The 12 volt signal informs the control module the engine is being started. The Engine Control Module (ECM) uses the starter signal for timing and fuel control at engine start-up.

OPERATION

The starter signal is generated by the ignition switch whenever it is in the start position.