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Home >> Jeep >> 2000 >> Wrangler SE, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Signals >> Auto Shutdown (ASD) Relay

Auto Shutdown (ASD) Relay

A 12-volt signal indicates to the PCM that the 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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