48
Figure 3-29 EGR solenoid valve test
3.3.4
Fuel Pump
The fuel in the fuel tank can be pumped and pressurized through the fuel pump, usually there are 6-8 sectors. Under
the same condition of the engine, a good fuel pump has the same and uniform current change in each sector.
Use a current clamp, connect one end to channel 1 of the oscilloscope, and clamp the other end to the power line of
the fuel pump. Pay attention to the direction of the current. (You can also use the corresponding fuse, replace it with
a extension cord and clamp on the cord of the current clamp).
Use ATO oscilloscope to test the electronic fuel pump, the specific operation is shown in Figure 3-30 below:
Summary of Contents for ATO1000 Series
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Page 2: ...Version Info Version Date Remarks V1 0 2020 06 ...
Page 52: ...Chapter 3 Automotive Test 49 Figure 3 30 Electronic fuel pump test ...
Page 71: ...68 Figure 3 49 K line test ...
Page 79: ...76 Figure 3 57 Mazda 6 Cylinder internal pressure measurement ...
