Sebring Convertible V6-2.5L SOHC 24 Valve (1996)
Automatic Shut Down (ASD) Relay: Description and Operation
Related Trouble Code Messages & Set Conditions
ASD Relay Control Circuit
PURPOSE
The Automatic Shutdown Relay (ASD) controls the 12-volt source to the fuel injectors, ignition coil, EGR solenoid and the generator.
The relay is located in the power distribution center (PDC).
OPERATION
One side of the relay control coil is supplied with 12 volts when the ignition switch is turned to the "RUN" position. The circuit is completed when
the other side of the relay coil is grounded by the powertrain control module (PCM).
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The PCM grounds the relay when the ignition switch is in either the RUN or CRANK position and engine RPM is detected.
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If engine RPM is not detected, the PCM will remove the ASD relay control circuit ground.
NAME OF CODE:
Auto Shutdown Relay Control Circuit
WHEN MONITORED:
With the ignition key ON and battery voltage greater than 10 volts.
SET CONDITION:
An open or shorted condition is detected in the auto shutdown relay control circuit.
POSSIBLE CAUSES:
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Relay coil open or shorted
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Fused ignition switch output circuit open
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ASD relay control circuit open or shorted
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Inoperative circuit driver in PCM
ASD Relay Output Circuit
OPERATION
When the ASD relay is energized, the relay's contacts connect the fused B(+) circuit to the relay output circuit. The powertrain control module is
connected in parallel with the ASD relay output circuit. This connection provides the PCM with a circuit to monitor the ASD relay output state.
Whenever the PCM energizes the ASD relay, it checks the feedback circuit to ensure voltage is present at the ASD relay output. If voltage is not
present, a trouble code is set.
NAME OF CODE:
No ASD Relay Output Voltage At PCM
WHEN MONITORED:
With the ignition key ON and battery voltage greater than 8 volts.
SET CONDITION:
No voltage sensed at the powertrain control module (PCM) when the auto shutdown relay (ASD) is energized.
POSSIBLE CAUSES:
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ASD relay output circuit open
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ASD relay failure
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Fused B(+) circuit open
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Failed PCM