Informs the computer about the speed of opening the throttle and the relative position of the throttle. The throttle position sensor is installed on the throttle block, next to the idle sensor.
The sensor of the throttle of the vases is essentially a variable resistor, which changes resistance with the movement of the throttle. According to the signals of the sensor, when the throttle opens, the computer supports the proper ratio of air / fuel. In this article we will consider the problems related to a faulty sensor and check it.
Symptoms of a faulty position of the throttle.
The classic symptom of the faulty position of the throttle position is unstable turns or failures during acceleration. The ratio of the fuel mixture is disturbed because the computer does not receive the correct signal. As an alternative to DPDZ, a feedback circuit from the oxygen sensor provides the necessary information, but not quickly enough.
Sensors of the position of the throttle, usually wear out in a position just higher from the position of the idle stroke, since this is the position of the throttle. The damaged sensor can skip or cut off the signal when the throttle opens, which leads to instant loss of communication with the computer. As a result, unstable turns or failures, because the computer is not able to provide the necessary fuel enrichment.
If DPDZ is closed, then the computer will receive a completely open throttle signal. This will lead to the fact that the computer will enrich the mixture.
If the DPDZ is cliff, then the computer will assume that the throttle is closed. As a result, the fuel mixture will be too poor.
Checking the throttle.
You can measure the voltage at the output of the sensor using a voltmeter.
Firstly, you need to check the presence of voltage at the input of the sensor. DPDZ cannot give a signal if it does not receive the input voltage from the computer.
Next, check the output voltage from the sensor. The voltage should smoothly increase from 1 volt to a maximum of 5 volts, with a completely open throttle. There is no increase in voltage or signal loss means that the sensor must be replaced.
Replacement of the throttle.
Replacement is made on a cooled motor.
Disconnect the connector from the sensor.
We twist two screws holding the sensor on the throttle block.
Remove DPDZ and install a new sensor in its place.
Next, twist the sensor, connect the connector and start the machine.