Automatic Shutdown (ASD) Relay Input Signal

A 12-volt sense signal to PCM by ASD relay to indicate that ASD relay has been activated. ASD relay is located in Power Distribution Center (PDC). ASD relay is battery voltage source for heated oxygen sensor heating element, ignition coil, generator field winding and fuel injectors. If PCM does not see a 12-volt signal when ASD relay should be activated, a Malfunction Indicator Light (MIL) Diagnostic Trouble Code (DTC) will be set. See MALFUNCTION INDICATOR LIGHT (MIL) under SELF-DIAGNOSTIC SYSTEM  .