DIFFERENTIAL PRESSURE FEEDBACK (D.P.F.) EGR SENSOR INSPECTION[AJ (3.0L Duratec)]

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1. Remove the differential pressure feedback EGR sensor with the connector still connected.

2. Install the vacuum pump to the narrower diameter of the differential pressure feedback EGR sensor.

3. Connect the M-MDS.

4. Turn the ignition switch to the ON position.

5. Using M-MDS, verify that the DPFEGR PID value is as indicated in the table.

• If not within the specification even though the related wiring harnesses have no malfunction, replace the differential pressure feedback EGR sensor. (See DIFFERENTIAL PRESSURE FEEDBACK (D.P.F.) EGR SENSOR REMOVAL/INSTALLATION[AJ (3.0L Duratec)].)

• If the monitor item status/specification (reference) is not within the specification, even though the resistance is within the specification, perform the “Circuit Open/Short Inspection”.

Differential pressure feedback EGR sensor standard

Measurement condition	DPFEGR PID value
Vacuum pump vacuum 0 kPa	0.2—1.3 V
Vacuum pump vacuum 27—30 kPa	More than 4.0 V
Within 3 s just after releasing air from the vacuum	Less than 1.5 V

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION[AJ (3.0L Duratec)].)

2. Inspect the following wiring harness for open or short (continuity check).

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Open circuit

• If there is no continuity, the circuit is open. Repair or replace the harness.

― D.P.F. EGR sensor terminal A and PCM terminal 90

― D.P.F. EGR sensor terminal B and PCM terminal 91

― D.P.F. EGR sensor terminal C and PCM terminal 85

Short circuit

• If there is continuity, the circuit is shorted. Repair or replace the harness.

― D.P.F. EGR. sensor terminal A and body ground

― D.P.F. EGR. sensor terminal B and power supply

― D.P.F. EGR. sensor terminal C and power supply

― D.P.F. EGR. sensor terminal C and body ground