what obd app is god to check parking assistance sensors
Parking sensors are a standard feature in cars nowadays. Although they rarely fail, it's good to know how you can check them when there are some problems.
There are some easy ways for you to bank check parking sensors that are not functioning properly. These checks include a simple tactile exam, a multimeter, or fifty-fifty a smartphone. Scanners are as well another good fashion to perform the check
I volition describe each method later in this article.
How do parking sensors work?
There are two types of parking sensors, ultrasonic, which are more mutual, and electromagnetic. The principle of ultrasonic parking sensors operation is based on the fact that they emit ultrasonic waves and catch their reflection from an obstacle. The distance between the sensor and the interference is calculated by the chief unit based on the difference in radiation time.
Electromagnetic sensors are tape that emits an electromagnetic field. The tape is installed on the within of the front and rear bumper. These sensors are more than modern and reliable, merely quite expensive, and so they are quite rare and only on premium cars.
Parking sensor malfunctions
- contact corrosion, moisture entering the housing through cracks;
- declining electronic component of the sensor;
- contagion of the working surface of the parking sensor;
- mechanical damage to the sensor as a result of an accident, impact;
- harm to the wiring (especially typical for the front sensors due to clay and chemicals);
- manufacturing defect of the parking sensor, or its low quality (most often aftermarket, fake).
As a result of damage to one or more sensors, the Parktronic arrangement may either not work at all, or, on the opposite, constantly beep, triggering false signals. And when the sensor wires are shortcircuited, particularly, in rainy atmospheric condition, a parking sensor error may display on the dashboard.
Also, sometimes car owners call up that the fault occurred due to dirt on the sensor's working surface or the fact that information technology was painted to friction match the color of the front or rear bumper.
How to check the parking sensors?
Yous can check the ultrasonic parking sensors in 4 ways: tactile, using a smartphone, using an electronic tester, and using an electronic error scanner.
Tactile check
It makes sense to start checking the parking sensor with a visual inspection. However, before doing this, you must start the engine put the automobile in the first gear or reverse, but not bulldoze. To piece of work, you will need another person who will perform these deportment in the car, while you audit the sensors.
To check the rear parking sensors, put the gearshift in reverse. To check the front sensors, you lot need to appoint in the first gear on the transmission transmission or fix the "Drive" mode on the automatic transmission.
When the sensor is operational and activated, it emits barely discernible clicks (near five…10 clicks per 2d) when an object is directly approaching it (it is easiest to cheque with your finger). If you put your finger on information technology, the sensor surface should vibrate slightly. For a improve feeling of vibration, you lot need to move your finger a little over it.
Then, you need to check each parking sensor. At the aforementioned time, the partner in the cabin should monitor how the arrangement reacts to touching the sensors. This volition help you determine which sensor is bad. If all the sensors do not piece of work, there are almost likely problems with the parking sensor module or the wiring.
Checking the parking sensors with a smartphone
At that place are parking sensors that accept a very weak vibration and the audio emanating from them is practically not captured by the ear. In this example, it makes sense to use a voice recorder on a smartphone for diagnosis.
However, you don't need just a simple voice recorder, but an application that allows you to build a diagram of the incoming audio. The operating system and the awarding itself are irrelevant in this instance.
For diagnostics, you need to actuate the app and bring the microphone to the parking sensor. Recording the signal should take about 30 seconds. In the end, you need to listen to the recording. Showtime, if at that place are signals, they will exist visible on the chart. And 2d, at that place volition be clearly aural clicks on the recording from a functioning sensor.
It'southward best to do this in a very quiet place.
Checking the parking sensor with a multimeter
The most reliable method of checking the parking sensors is to employ a multimeter. To exercise this, the tester must be set to the electrical resistance measurement mode, and the sensors demand to be removed from the car.
The resistance value for unlike sensors volition differ, withal, information technology is important to check that in that location is no intermission or short circuit. Three-contact parking sensors usually have the following Pinout: the first contact is a "plus", the second contact is a indicate, and the third contact is a "minus".
In a working sensor between "plus" and "minus", the resistance should be more than than 0.five megohms (the college – the better). Between the" minus " and the signal contact, there should exist a resistance of the society of 2 – 40 kOhm (depends on the sensor). There will be a similar resistance between the signal contact and the "plus", about ii – 40 kOhm.
In some cases, even for bad parking sensors, the value of the measured resistances will be normal, so if this is the case, so additional diagnostics must exist performed.
Checking the parking sensors with a piezoelectric element
Parktronic sensors are substantially piezoelectric elements. They change their shape (vibrate) from the voltage practical to them. At that place is also a contrary effect. When the piezoelectric chemical element vibrates, it generates a voltage. This effect can be used for checking. To do this, you will need a dissimilar Parking sensor (simply not standard) with a shielded wire and two LEDs.
These LEDs must be soldered to the output wire of the sensor in a counter-parallel excursion. This will allow the LEDs to glow alternately in their polarity. Adjacent, yous need to wipe the sensor membrane and attach it to the sensor beingness tested on the automobile. If information technology vibrates, the LEDs will flash. This method is well suited for testing those parking sensors that do not vibrate when you touch them.
Checking the parking sensors with a scanner
You can also utilise software to diagnose parking sensors in your car. To practice this, you demand to have an electronic scanner. The easiest mode is a portable one on an ELM327 chip, and a diagnostic program installed on your smartphone. one of the nearly popular is ELM Config.
The program allows yous to read errors from various motorcar systems, including parking sensors. The department where yous need to check for errors in the parking sensor is called PAM in English language. After clicking on the mistake reading button, the program will provide the advisable data.
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Source: https://carphrases.com/how-to-check-bad-parking-sensors/
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