ASD Sense - PCM Input

ASD SENSE - PCM INPUT

A 12-volt signal at this input indicates to the PCM that the ASD has been activated. The relay is used to connect the oxygen sensor heater elements, oxygen sensor heater relay, ignition coil and fuel injectors to the positive side of the 12-volt power supply.

This input is used only to sense that the ASD relay is energized. If the Powertrain Control Module (PCM) does not see 12-volts at this input when the ASD should be activated, it will set a Diagnostic Trouble Code (DTC).