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audi a4 speedometer sensor location
Audi a4 speedometer sensor location: The position sensor is located in the drive axle housing or transmission housing to eliminate electromagnetic and radio frequency interference generated by high-voltage electric wires, car phones or other electronic devices, to ensure that electronic communication will not be interrupted, and to prevent poor driving performance.
1. The vehicle speed sensor is an important sensor, which provides data for the speedometer on the instrument panel. In addition, the signal from the vehicle speed sensor shall also be fed back to the ecu, which will adjust the gear of the transmission according to this signal, control the locking of the torque converter of the transmission, control the idle speed of the engine, control the opening and closing of the cooling fan, control the cruise control, etc.
2. In addition, there are also speed sensors on the wheels, which specifically belong to wheel speed sensors. The signal of this sensor is fed back to the ecu, which then controls the abs system, ebd system, anti-skid system, traction control system, etc. The wheel speed sensor is one of the more important sensors, which is related to driving stability, driving safety, vehicle handling performance, etc.
Where is the locotion:
1. There are many corresponding inductive contacts on the gear sensor. When the car is shifting, the inductive contacts will also move and the electrical signal will complete the corresponding work.
2. When the car is shifting, the inductive contact moves, and the voltage value will also change. At this time, the gear position sensor can find the detection signal, and timely transmit the detection signal to the transmission computer to control the corresponding working parts.
3. The gear position sensor is also known as the gear switch sensor, which is generally available in automatic transmission vehicles. If the gear position sensor fails, the transmission computer will not be able to determine the specific gear position, and errors will occur when changing the gear position, resulting in the car can not start or the gear conversion is abnormal. Even if the car can start normally, it is likely to fail to shift normally during driving.
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