Auto Shutdown (ASD) Sense

The ASD sense circuit informs the PCM when the ASD relay energizes. A +12 volt signal at this input indicates to the PCM that the ASD has been activated.
- This input is used only to sense that the ASD relay is energized.

When energized, the ASD relay supplies battery voltage to the fuel injectors, ignition coils and the heating element in each oxygen sensor.
- If the PCM does not receive 12 volts from this input after grounding the ASD relay, it sets a Diagnostic Trouble Code (DTC).