Chapter 3 Automotive Test
43
Figure 3-23 Vehicle speed sensor test
3.2.13
Throttle Position
The throttle position sensor is installed on the drive shaft of the throttle butterfly plate to sense the opening of the
throttle and provide a basis for ECM to judge the intake. There are analog output and throttle switch output.
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 the throttle position sensor or the throttle
switch signal 1.
Use a BNC to banana cable, connect one end to channel 2 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 the throttle position sensor, or the throttle
switch signal 2. (if it is a throttle switch, you need to connect this test lead).
Use ATO oscilloscope to test the vehicle speed sensor, the specific operation is shown in Figure 3-24:
Summary of Contents for ATO1000 Series
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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 ...
