PCM Control of Fuel Injection

PCM Control Of Fuel Injection
The command signal from the PCM to the Injection Driver Module is the Fuel Delivery Control Signal. The poppet valve requires 12 volts to command the poppet open and 0 volts to command the poppet closed. The PCM also supplies a synchronizing signal, CMP, to indicate cylinder No.1 (going from 0 to 12 volts) and cylinder No.4 (fires 5th) (going from 12 to 0 volts).