Sundance Duster L4-153 2.5L SOHC VIN K TBI (1993)
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During a diagnostic check, (activated only during select engine/driving conditions), the PCM tests the entire EGR system for failures.
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If the PCM detects an EGR system failure, the Malfunction Indicator Lamp (MIL), (previously called the Check Engine Lamp), in the
instrument panel will be illuminated, indicating that immediate service is required.
Vacuum Control Solenoid Valve Operation
EGR Mounting
Electric EGR Transducer (EET)
NOTE: The EET assembly is a vacuum control solenoid valve and a backpressure transducer, in one package.
PURPOSE
The PCM controls when the EGR valve can be actuated, through the Vacuum Control Solenoid Valve portion of the EET.
OPERATION
Ported vacuum from the throttle body, is supplied to the Solenoid Valve.
The PCM controls the flow of vacuum between the throttle body and the back pressure transducer, (through the solenoid valve ground circuit).
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When the solenoid is energized (grounded), no vacuum is supplied to the transducer.
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When the solenoid is de-energized (not grounded), vacuum is supplied to the transducer.
The solenoid will always be energized (no EGR), under following conditions:
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Engine warm-up, (engine coolant temperature below 40 ~F)
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Engine at idle
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Wide Open Throttle (WOT) operation
