Video: how to test ultrasonic parking sensors using PicoScope

Pico's automotive support engineer shares his tips on testing ultrasonic parking sensors

Video: how to test ultrasonic parking sensors using PicoScope
PicoScope ultrasonic parking sensor detector.

Pico Technology has introduced a new test lead for ultrasonic parking sensors to its range of accessories.

The two-meter long lead gives technicians the ability to prove the correct operation of ultrasonic parking sensors.

By directly showing the strength of the signal from a given sensor, it can also be used to identify problems with the masking of sensors due to the fitment of aftermarket accessories such as tow bars or lights.

Automotive support engineer at Pico Technology, Phil Rutt explains how technicians can use the new test lead with their PicoScope.

He advises that technicians should run the engine in reverse, with the handbrake on and a foot on the brake.

Once the waveform has been captured, the vehicle’s engine should be turned off, leaving the handbrake on.

PicoScope settings:
  • Channel A (DC) ±100 mV
  • Timebase 20 ms/div.

Waveform example: two signals were detected from the operating parking sensor.

Using an example test, Phil’s waveform shows two signals from the operating parking sensor.

Zooming in on the image reveals more detail and by using the signal rulers in PicoScope Automotive, Phil read that the signal was 50.28 kHz.

He said: “Typical values can range from 50 mV to 200 mV depending on location and distance in relation to the sensor.”

For further information about testing ultrasonic parking sensors, click ‘more details’ below to go to the guided test.

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