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Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315

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BuyFindarrow_forward

Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315
Textbook Problem

While discussing EGR systems with a differential pressure feedback electronic (DPFE) sensor: Technician A says that the DPFE sensor sends a signal to the PCM in relation to intake manifold pressure. Technician B says that the PCM corrects the EGR flow if the actual flow does not match the requested flow. Who is correct?

a. Technician A only

b. Technician B only

c. Both A and B

d. Neither A nor B

To determine

The correct technician between A and B who are discussing the EGR systems with a differential pressure feedback electronic (DPFE) sensor.

Explanation

The PCM, either electronically or by vacuum, operates the EGR valve. When the EGR valve is operated by vacuum, the opening and closing of the valve are controlled by PCM and the flows of EGR valve depends on the signals from the DPFE sensor. It means that the sensor senses the pressure of the manifold vacuum intake and sends the signals to PCM. This implies that technician A is correct...

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