Open up the egr valve and check for any corrosionwater infiltration inside the egr valve or inside the connector and clean it up with electric cleaner if you find any corrosion. After miles of service the exhaust gas recirculation egr systemespecially the egr valvewill lead to engine performance problems due to carbon buildup components mechanical problems or vacuum hose leaks.
1991 Toyota Camry Fuse Diagram Wiring Diagram
Egr valve wiring diagram. If i may i would advise you to unplug the egr valve on your motor. The valve is located directly in between the large black cylindrical oil filter. Ground circuit for egr valve solenoid. Different places inside the valve on my 18 egr. The wiring diagrams i have show 2 3 as the motor for the 16tdci engine. Egr valves are commonly a simple two wire solenoid valve driven open by a pulsed ecu signal and returned closed by spring pressure.
Just pull the. The egr vacuum diagram for your particular vehicle is displayed on the vehicle emission control information veci label. If still faulty replace the egr valve. Electronic egr valves are used in vehicles dated 1990 and up. The vehicle computer operates the valve instead of previous years egr valves which are operated by the engine vacuum. Learning how to test an egr valve will save you time money and some headaches.
The egr system is differential pressure feedback egr dpfe system controlled by the powertrain control module pcm and composed of the following components. Gray with black stripe wire. The egr valve in photo 4 of 4 with the green check mark is the one covered by this article. Check for any possible wiring issues to the egrmeasure with an electric wiring diagram. The egr valve in photo 3 of 4 with the red x is not covered by this article and is tested differently. It is a small black cylinder directly on top with a 4 prong wire harness connector going directly into the top.
The valve works exactly the same in the 1997 as it does in the 1984. Egr valve test 2000 2009. It shows 3 4 as the motor for the 20tdci engine. Ill be using these same letters for the circuit descriptions below. It could be the valve is mechanically stuck. Reinstall the egr valve and try again.
Egr valve pintle position sensor ground provided by the pcm. And 90 degree aluminum intake elbowthrottle body on top of the motor. The procedure to test an electronic egr is a bit different and requires a multimeter. Dpfe sensor also referred to as the back pressure transducer egr vacuum regulator evr solenoid egr valve and assorted hoses. It might free off and work for a bit or work for longer if whatever is. If you need the egr valve test for the egr valve marked with the x you can find it here.
On page 6 6 hanes 72030 you will find the diagram that shows the egr valve for models 1981 through 1984the diagram also is followed by models 1985 through 1997. Most of the egr valves will have the letters a thru e molded onto the egr valves connector. When faults occur it is due to the valve sticking partially open or binding so the ecu signal is no longer able to open it. Managed to dismantle the thing and fix it.
Gallery of Egr Valve Wiring Diagram
