The radiator actuator sensor is an important part of the engine cooling system. It is particularly relevant in the heat of the weather, when the normal operation of the engine depends on the timely inclusion of the fan. The device and operating principle of the fan-on sensor
The device and operating principle of the fan-on sensor
The fan sensor (BV) is simple. At the bottom of the sensor is a bimetallic plate which, when the temperature is reached, is deformed and pushes the pushrod. The shot, in turn, closes the contacts. After the contact is closed, the signal is sent to the ECU, after which the control unit will issue the command to turn on the heat sink fan assembly.
The fan enable sensor can be one-and two-speed. Most vehicles have sensors for one fan speed. They have one pair of contacts, which turn on the heat sink fan assembly. However, there are sensors that have two pairs of contacts and two fan speeds, respectively.
Depending on the engine parameters, the radiator actuator may have a different response temperature. Where is the VAZ fan actuator actuator
Where is the VAZ fan actuator actuator
It is not difficult to find the radiator actuator for the heat sink fan. Carburetor models of the VAZ (2101, 2102, 2103, 2104, 2105, 2106, 2107 etc.) the fan activation sensor is located on the radiator on the left side of the movement. The VAZ with the carburettor after contact's closure shall be applied directly to the electric motor of the fan and begins to rotate the wings.
For VAZ injection models (2107, 2108, 2109, 21099, 2110, 2111, 2112, etc.) the fan activation sensor is located close to the thermostat. In this case the signal from the sensor goes first to the ECU, and it is already receiving a command to turn on the electric motor of the fan.
How to check the WO fan-on sensor
The failures that can occur in the VAZ fan actuator are shown with two main symptoms: the heat sink fan does not turn on or, conversely, does not shut down and is running continuously.
The check of the WAN fan-on sensor can easily be carried out at home with your hands. This requires only a capacity to heat water, a thermometer to measure the temperature of the water, and a multimeter. The procedure for the verification of the IVD shall be as follows:
1. Release the sensor on the fan to the water.
2. To contact the dachette to connect the terminals of the multimeter, which has been transferred to the omm mode.
3. To heat up the water up to 92-95 ° (the temperature of the sensor's actuation can be seen on its body), the sensor contacts shall be closed.
If the multimeter does not make a sound (that is, the fan transducer contacts have not closed), the BV is not working. The repair of the radiator insertion is inadvisable, it is better to change it. How to replace the WO fan-on sensor
How to replace the WO fan-on sensor
If you have verified that the fan is turned on, it is better to replace it. It's easy to do. The replacement of the fan transducer to the VAZ is carried out as follows:
1. Abandon the battery.
2. To cool the radiator with the coolant.
3. Remove the fan assembly connector.
4. Disposition the failing sensor and place a new sensor in its place.
5. Collect everything back without forgetting the antifreeze.