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
PURPOSE This signals the
Engine Control Module (ECM) whenever the engine is cranking.
OPERATION The starter signal is generated by the
ignition switch whenever it is in the start position. The 12 volt signal informs the control module the engine is being started.
PURPOSE The ECM uses the starter signal for fuel and timing control at engine start-up.