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Auto Shutdown Relay

A 12-volt signal indicates to the PCM that the Auto Shutdown (ASD) relay is activated. The ASD relay is used to connect the oxygen sensor heater elements, ignition coil and fuel injectors to a 12-volt power supply. The PCM uses this input to sense that the ASD relay is energized. If the PCM does not see 12 volts at this input when ASD relay is energized, a Diagnostic Trouble Code (DTC) will set.

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