Compressed Natural Gas

CIRCUIT OPERATION
When the ignition switch is in the START or RUN position, it connects circuit A1 from fuse 3 in the Power Distribution Center (PDC) to circuit A21. Circuit A21 feeds circuit F18 through fuse 9 in the fuse block. Circuit F18 powers the coil side of the Automatic Shut Down (ASD) relay The Powertrain Control Module (PCM) supplies ground for the coil side of the relay on circuit K51. Circuit K51 connects to cavity C3 of the PCM.

When the PCM grounds the ASD relay contacts inside the relay close and connect circuit A16 from fuse 4 in the PDC to circuit A142. Circuit A142 splices to the generator field terminal, fuel injectors, ignition coil, low pressure fuel shut-off solenoid, and the heated oxygen sensors. Circuit A142 also connects to cavity C12 of the PCM.