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3.3.3 EGR Solenoid Valve
The EGR solenoid valve is an abandoned recirculation solenoid valve. After opening, a part of the exhaust gas will
be sucked into the intake manifold again to reduce the combustion temperature, so as to reduce the emission of
nitrogen oxides in the exhaust gas and achieve the goal of environmental protection. Use a BNC to banana cable,
one end is connected to channel 1 of the oscilloscope, the other end is grounded with the black plug, and the red
connector is connected to the ground wire of the EGR solenoid valve with a needle.
Use ATO oscilloscope to test the EGR solenoid valve, the specific operation is shown in Figure 3-29:
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