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
Cranking Signal: Description and Operation
This signal is sent from the engine starter circuit. The ECM judges whether the engine is cranking or not, and uses it as one of the signals to control fuel injection timing, injector pulse width, ISC solenoid valve operation,
throttle opener, VSV operation, and
PTC heater operation (for A/T vehicle).