EGR CONTROL VALVE INSPECTION[AJ (3.0L Duratec)]


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Airflow Inspection

1.  Disconnect the vacuum hose from the EGR control valve (intake manifold side and EGR valve side).

2.  Plug the EGR control valve port (EGR valve side).

3.  Install the vacuum pump to the EGR control valve port (intake manifold side).

4.  Verify that no vacuum is applied when applying vacuum to the EGR control valve using the vacuum pump.

•  If vacuum remains, or it takes time to intake air, replace the EGR control valve.


Resistance Inspection

1.  Disconnect the negative battery cable.

2.  Disconnect the EGR control valve connector.

3.  Measure the resistance between the EGR control valve terminals.

•  If it is not within the specification, replace the EGR control valve.
•  If the monitor item condition/specification (reference) is not within the specification, even though there is no malfunction, perform the 'Circuit Open/Short Inspection'.
EGR control valve resistance
26—40 ohms


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.
―  EGR control valve terminal A and main relay terminal B
―  EGR control valve terminal B and PCM terminal 47


Short circuit

•  If there is continuity, the circuit is shorted. Repair or replace the harness.
―  EGR control valve terminal A and body ground
―  EGR control valve terminal B and power supply