What should the voltage be on an EGR valve?
If you can make connections to the pins on the EGR, and have a variable power supply (0-12v at about 4A), then it is quite easy to test the valve. (Disconnected, and preferably removed from the car for visibility.)
Why is my EGR valve not working on my car?
High volts could mean there is a blockage somewhere within the EGR valve and no voltage could signal a problem with the valve and computer communication. Turn the vehicle off and remove the key from the ignition. Allow the EGR valve ample time to cool down. Open the hood and locate the EGR valve. The valve is mounted on the exhaust manifold.
What does pin 1 on the EGR mean?
But with valve disconnected, pcm could be driving it for some odd reason. Pin 1 is Vref (5v), Pin 5 is Ground (0v), Pin 4 is the feedback signal, so may be floating if the valve is not connected. If you can make connections to the pins on the EGR, and have a variable power supply (0-12v at about 4A), then it is quite easy to test the valve.
Can a multimeter be used to test EGR?
The vehicle computer operates the valve instead of previous years EGR valves, which are operated by the engine vacuum. The procedure to test an electronic EGR is a bit different and requires a multimeter. If you notice your vehicle running poorly, stalling or having poor gas mileage, you should test the EGR.
Why is the voltage on my EGR valve low?
This low or non-existent voltage output is usually due to the 5 Volt Reference Voltage (that powers the pintle position sensor inside the EGR valve) is missing. So, to check for this, go to: TEST 3: 5 Volt Reference Circuit.
When do I need to test my EGR valve?
The procedure to test an electronic EGR is a bit different and requires a multimeter. If you notice your vehicle running poorly, stalling or having poor gas mileage, you should test the EGR. High volts could mean there is a blockage somewhere within the EGR valve and no voltage could signal a problem with the valve and computer communication.
What should dpfe voltage be for EGR valve?
Assuming the EGR valve is ok the engine should begin to stumble and possibly even stall as vacuum is applied to the valve and the pintle opens. Your DPFE voltage should also approach 4.5 volts.
Why did my engine cut out due to EGR?
The post-repair image shows that the MAP signal voltage increases to 4.5 Volts. This is because the engine cut out due to the high rate of EGR when the valve was actuated. This further confirmed the diagnosis.