What is the VAZ idle sensor2114, for which it is needed and which faults are most often encountered, every car owner of this brand should know. A modern car is a collection of a set of sensors that measure various parameters - crankshaft position, speed, ramp pressure, etc. All signals are fed to the microcontroller control unit and processed. According to the built-in algorithm, the controller decides what to do: turn on the fuel pump or turn it off, apply power to the injectors, idle regulator, or stop the washing.
What does РХХ in the system do?
The correct name for this device is not a sensor,but the regulator. After all, by definition, a sensor is a measuring device that converts a physical quantity into an electrical signal. But when the idle speed sensor is replaced, it can be seen that it does not measure anything. This is a conventional stepping motor. It drives a small needle that closes the air supply or opens it.
Let's say you turned on the ignition.At this moment, voltage is applied to the winding PXX. The stepper motor starts to rotate, the stem reaches its end position and returns to its original state. This is the initial, pre-start, calibration - it is always done as soon as the ignition is switched on. When the engine is started, the regulator rod is fully extended, the air passage is closed. The minimum required amount of air passes through the bypass channel. When the throttle valve is opened, air is supplied in a much larger quantity, the VAZ 2114 idle speed sensor is excluded from the air supply circuit.
Vehicle ECU
Вы замечали, как работает непрогретый инжекторный engine in winter? Constantly maintained a certain engine speed crankshaft. This is only due to the idle speed regulator. It opens and closes the bypass channel, thereby regulating the quality of the fuel mixture. Similarly, the lever "suction" in the carburetor engines. During the operation of the car, the following errors may appear, the culprit of which is РХХ:
- 0507 - excessively high crankshaft speed at XX.
- 0506 - excessively low crankshaft speed on the twentieth.
- 0505 - breakdown of the IAC.
At the same time, the engine may stall during gear shifting. The crankshaft speed decreases when additional equipment is turned on - a clear sign of the failure of the regulator.
Replacing the IAC with their own hands
To replace it, you need to know where the sensor isidling on the car VAZ 2114. And you can find it in the area of the throttle unit: this is where the device is installed. To replace, you need one tool - a Phillips screwdriver. Unscrew the two bolts that secure the IAC housing to the throttle assembly. Carefully remove it and unplug the plug. It is advisable before installing a new regulator to make sure that the old one has become unusable. Also it will be useful to carry out cleaning of channels, for this purpose get special spray. Install the idling sensor VAZ 2114 in the reverse order.
Damage diagnostics
To make sure that the regulator is idlecourse can not be restored, you need to spend a couple of procedures. First, with a multimeter, check the resistance of the windings. If there is a cliff, it will immediately become clear. Secondly, remove the regulator and connect the plug to it. Gently hold the stem with your finger, but do not press. When turn on the ignition, the idling sensor VAZ 2114 will start to work. The rod will set in motion and stop in a certain position. After the ignition is turned off, it is fully extended (if it were on the car, the bypass channel would be completely closed).
