What is the reason why Volkswagen Lavida fans keep turning

Volkswagen Lavida. The fan keeps turning. What is the reason?

There are many of the first ones in this, so general, the fan keeps turning because the temperature of the cooling system is relatively high. The fan keeps turning, this is abnormal, phenomenon. If the fan turns, it is generally because of the high water temperature, then the high water temperature will also cause the high water temperature due to the following reasons, the first is the lack of water, and the second is.

If the pot is boiled, then it belongs to us. The inside of the eighty machine is boiling, and the third one is. There is a fault in the control system.

If the car has been completely cooled down, if the fan is still running, it may be that the cooling fan assembly or the cooling fan wiring is faulty. It is recommended to send it for repair.

Under normal circumstances, after the vehicle is turned off, the engine cooling system will then dissipate the heat from the engine, so the fan will turn for a while, and it will be longer after the air conditioner is turned on in summer. If it still doesn't stop for a long time, contact the local 4S shop for inspection and maintenance. Specific fault analysis of Volkswagen Lavida fans that have been turning:

1. Start the engine and idle it, check that the electronic fan is not running, then turn off the ignition switch, and find that the electronic fan is not running, and the electronic fan will start to run at high speed after about 1min. The glitch does exist. 2. Use the vehicle diagnostic instrument VAS6150B to check the fault with the guiding function, and find that there is 1 fault code P068 B00 in the engine control unit, which means:

EMC PCM Power Relay Power Loss Performance Too Slow (J271 Main Relay).

3, according to the meaning of the fault code, combined with the experience of previous maintenance of similar faults, the preliminary analysis of the fault of the car is related to the power supply provided by the relay J271 (648) The installation position of J271 (648) is below the left side of the dashboard, as shown in Figure 1. When the ignition switch is turned off and the electronic fan rotates normally, unplug the J271 (648), find that the electronic fan stops running, put the J271 (648) back on, and the electronic fan continues to run. When the 293 did not receive power from the J271, the electronic fan stopped.

4. The electronic fan keeps running, which means that J271 has been supplying power. Unplug J271 and measure the 30 and 87 pins of J271, and find that they are in the conduction state, indicating that the contacts of J271 are often engaged. Replace J271, start the engine, and then turn off the ignition switch, the electronic fan does not rotate normally.

Summary. Hello, the reason why Volkswagen Lavida small electronic fan keeps turning is the continuous operation caused by high water temperature.

1. The engine is overheated due to insufficient cooling water, and the electronic fan continues to run; Add antifreeze; 2. The engine is overheated due to water leakage in the water tank, the hose is loose or damaged and the water leakage, and the electronic fan continues to run; Replacement or repair of water tanks;

3. Due to the failure of the thermostat, due to the thermostat, the temperature reaches the benchmark temperature and cannot send water to the water tank, or the water supply is too small, resulting in overheating of the engine and continuous operation of the electronic fan. Replace the thermostat.

Volkswagen Lavida big fan does not turn, small fan always turns.

Hello, this question can give you a perfect reply, wait for me to sort out the information, I'm typing, 2-3 minutes, don't finish.

Hello, the reason why Volkswagen Lavida small electronic fan keeps rotating is the continuous operation caused by the high water temperature and high key. 1. The engine is overheated due to the lack of water due to cold and skillful, and the electronic fan continues to run; Add antifreeze; 2. The engine is overheated due to water leakage in the water tank, the hose is loose or damaged and the water leakage, and the electronic fan continues to run; Replacement or maintenance of the water tank by the socks and silver; 3. Due to the failure of the thermostat, due to the thermostat, the temperature reaches the benchmark temperature and cannot send water to the water tank, or the water supply is too small, resulting in overheating of the engine and continuous operation of the electronic fan. Replace the thermostat.

Under normal circumstances, the electronic fan will automatically open to cool down after the water temperature is too high, if it is confirmed that the water temperature is too high and the electronic fan cannot work normally, please check and repair it immediately.

When the temperature is too high, the electronic fan is not **

1: The electronic fan is damaged - replace the electronic fan.

2: Electronic fan line fault - check the line.

3: The power supply of the electronic fan is abnormal - check whether the power supply of the electronic fan is AC220V, if not, please check the power switch.

4: The electronic fan contactor is broken - replace the contactor.

1. The high and low speed of the electronic fan is controlled by the thermal switch (F18) "only", this switch has two gears, which is installed on the water tank to detect the water temperature. It gives two signals to J293, and J293 conducts different open circuits to control the high and low speed of the electronic fan.

2. Turn on the air conditioner, and both fans should be turned. However, it should be noted that the air conditioner and the electronic fan are two relatively independent systems, which are controlled by two computers, named J301 (air conditioner) and J293 (electronic fan) respectively. J301 just gives J293 a signal to force 2 electronic fans to start.

Other than that, there isn't much to do with it.

3. However, when you turn on the air conditioner, the water temperature will definitely rise rapidly, which is the best way to check the fault of the electronic fan. If it doesn't turn, 1) Check the thermal switch, this is the most likely to be bad.

2) The internal resistance of the two fans.

3) The fan is broken, which is unlikely.

If there is only one revolution, the other is normal, the bad fan or the internal resistance is broken, or the fan itself is broken (this is still unlikely).

1. Cause of failure: the water temperature does not meet the requirements, and most of the car radiator fans use electronic temperature control to work, so generally only when the water temperature in the car reaches the required temperature, the fan will start to rotate normally, if the temperature is too low, the radiator fan will not be able to rotate.

Solution: Line problems, short circuit and broken circuit will cause the fan not to rotate, carefully check, and repair.

2. Cause of failure: If the relay fails, if the water temperature meets the requirements, the car radiator fan still can't work, then there may be a problem with the relay of the fan, if the relay fails, the radiator fan of the car can't work.

Solution: Check if the water temperature relay is broken, replace it if the contact is bad or it does not respond.

3. Cause of failure: If there is a problem with the temperature control switch, it will also have a certain impact on the operation of the car radiator fan, so it should also be checked.

Solution: Replace the temperature switch.

There are reasons why the car cooling fan does not rotate, the fan itself is broken, and the fuse relay of the fan. It may also be due to the line plug and other reasons, which need to be checked carefully.

Hello, the fan does not rotate, it is normally caused by the damage of the fan relay or the broken circuit of its connection line.

It is recommended that you check with your local service technician.

Turn on the air conditioner. How much is the water temperature, the temperature will not turn if it does not arrive, 105 degrees Volkswagen.

Hello dear <>

Is the start of Shanghai Volkswagen New Lavida the fan going to turn? Hello: Lavida fans are not controlled by a temperature switch.

If it does not turn it indicates that the fault has been solved, if it does not work, it is recommended to use a special computer Yanshan to check whether there is a relevant electronic fan failure, if there is a large electronic fan that is recommended to be replaced. I hope it can help you and I wish you a happy ride! [Regret the car question, ask the car master.]

Professional technician of the front ridge 4S shop, 10 minutes to solve.