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With all the modern engines electrical system is key to have them operating on
top condition. This includes all of the sensors on the engine all the way
up to controlling fuel needed to keep the engine running fed into engine control
module (ECM). A hand full inputs to the ECM like ignition voltage to
command the ECU to turn on and start signal and in some cases throttle input to
command how fast the engine needs to run is all that is needed. Various security
measures in the ECM are implemented preventing unauthorized starting of the
engines but that is not going to be covered here.
X102 connector
As we are using General Motors (GM) series engine this is the defacto forward
connector to control the engine. It is a function not a brand of the connector
though Delphi is the prodominent manufacturer of it. It is a multi pin connector
and in this case a 40 pin carrying constant battery and switched run power.
Along with CAN bus, fuel pump control and CAN bus that in the GM Global A
platform is used to command the ECM to start the engine and for transmission of
engine statistics from the ECM
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