Circuit Description
BCM receives voltage from the IGN0 input (circuit No. 1500) and ground from ground connector G203 when ignition switch is turned to RUN position. Engine will start only when BCM recognizes the signal from the key in ignition and sees the correct resistor code from the ignition lock cylinder.
BCM will set DTC is it does not detect a ground in circuit No. 80 (Light Green wire) for longer than 0.3 second.