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54
ATO series oscilloscope can test the following types of sensors. The purpose is to compare the real-time waveforms
with the standard waveforms to help users find problems. The following are expanded and explained separately:
3.2.1
ABS
The ABS wheel speed sensor is divided into analog and digital. The analog sensor has 2 signal terminals, the signal
is a sine wave, and the frequency of the sine wave represents the speed. Digital sensors generally have 3 terminals,
power, signal, and ground; the signal line needs to be tested, the signal is a square wave pulse, and the square wave
frequency represents the speed.
When testing, use BNC to banana cable, the BNC head is connected to the oscilloscope, and the banana head is
connected to the sensor or the ECM pin to test 1/2/4 signals at the same time. Shown as Figure 3-10:
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