Chapter 3 Automotive Test
37
3.2.7 Distributor
Distributor appears on models with high-voltage cables, and distribute the generated high voltages to spark plugs in
sequence. Distributors generally have Hall type and induction type. Hall type is generally 3-wire, voltage, signal,
and ground. The output is square wave. Inductive type is generally 2-wire. The output is sensing signal; use BNC
to banana cable, one end is connected to channel 1 of the oscilloscope, and the other end is black The plug is
grounded, and the red connector is connected to the signal line of the distributor with a needle.
Use the ATO oscilloscope to test the distributor sensor (divided into two types: Hall effect and induction). The
specific operation is shown in Figure 3-17:
Figure 3-17 Distributor
3.2.8
Fuel pressure
Fuel pressure signals generally appear on high-pressure fuel rails or sensors or common rail diesel vehicles, and the
pressure is relatively high. Generally, the fuel pressure is proportional to the output voltage, and the voltage increases
with the angle of the accelerator pedal (no-load and full-load will affect the voltage rise time).
Use a BNC to banana cable, connect one end to channel 1 of the oscilloscope, the other end of the black plug is
grounded, and the red connector uses a needle to connect the signal line of fuel pressure.
Use ATO oscilloscope to test the fuel pressure sensor, the specific operation is shown in Figure 3-18:
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 ...
