Webasto does not start: reasons. Fault codes for Webasto autonomy

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:43

"Webasto" has become almost indispensable thing in the modern automotive world. All those lucky people who have this preheater can avoid a lot of serious problems in winter. But sometimes they do happen. The driver tries to turn on the system and sees that the Webasto does not start.

The reasons for this behavior can be very different, and few people read the instructions for this installation. Let's figure out what Webasto is, how to properly operate this system, analyze the causes of its breakdowns, as well as error codes.

Webasto: what is it?

This device is a preheater for a car engine. It provides the engine with easy starting during the cold winter months. One of the differences with this German preheater is that it works autonomously.

Webasto device

This prelaunchThe element has five parts. This is an electronic system control unit, a combustion chamber, a heat exchanger, a coolant circulation pump, and a fuel pump.

Operation principle

When the driver turns on the unit, a fuel-air mixture is supplied to it, which then ignites and burns. This heats up the coolant in the heat exchanger. The pump responsible for the circulation in the heater pumps the antifreeze throughout the system through the radiator-heat exchanger, thereby warming the engine. The unit is also connected to the standard interior heating system and controls the start of the fan.

So, in winter, the driver may not wait for the power unit to warm up. The engine will quickly enter the operating temperature mode with one press of a button on the remote control.

Benefits and Features

One of the advantages of this device is that you do not even need to approach the car to start the system. You can start from the window of your own apartment. Many people love Webasto for its autonomy, and also for the fact that precious energy from the battery is almost not spent for heating. Of the serious disadvantages, it can be noted that the battery life is reduced by about a year. But there is always a price to pay for comfort. When the temperature reaches a certain threshold, and by default this level is 81 °, then the control unit will simply turn off the unit. The car will be waiting for its owner, being already completely ready to move. However, if no activity inwill not be there for a long time and the temperature will begin to fall, then when it reaches 64 degrees, Webasto will start and start its work again.

Self Repair

No one uses this device in summer, because there is no special need for it. But then the first colds come, the driver presses the button, but there is no result. And self-diagnosis begins. The driver tries to find the problem and often fails.

But still, self-repair of Webasto is possible, although the manufacturer recommends contacting the company's diagnostic center with all breakdowns. If you understand how the system works and if you have the necessary knowledge, you can repair the device yourself.

Possible malfunctions

All failures in the system can be divided into several types. These are Webasto errors in the internal memory of the device, but they often do not affect the operating modes in any way. There are also failures that occur spontaneously. This is an automatic start or secondary inclusions. The reason for this behavior may be a malfunction in the heater circuit. Webasto also turns itself off due to errors. Similar failures can occur in the electronic control unit or in the power supply system. The heater simply turns off by itself, while the Webasto errors will not be stored in memory. The second option is when the error persists, and in case of a restart, the system offers to turn it off and then turn it on again.

Block occurs due to some number of repeated codes. If the device fails 4 to 6 times, then the system will lock up and save an error report. It will not work to unlock the heater on its own. You must contact the service and diagnostic center of the company.

Also, blocking can occur due to overheating. If Webasto does not start, the reasons may be just one of these blockages.

Another reason is an error and shutdown due to low or high voltage. When the voltage rises and as a result reaches 11.5 V, the device turns off. Then the automatic purge starts. You can measure the voltage using the control unit. In case of overvoltages (usually at 16 V), the unit stops its work. When the problem is solved, the auxiliary heater will work again.

When Webasto does not start, other types of causes can be determined using a special diagnostic program for PC Thermo Test.

Errors and troubleshooting

All the reasons why the Webasto preheater malfunctions can be divided into four types. Codes that the ECU was unable to store can be corrected by checking the fuel supply. Then only separate components or the heater itself are replaced. If there are fixed failures, then you need to look at the type of problem in memory. In the electronic control unit, you can use the error code to identify why Webasto does not start and replace the problem nodes.

A list of error codes can be found in the instructions. For example, 010 is too low a voltage. And 047 is a short circuit in the autonomy fuel pump. If the built-in Webasto diagnostic system could not determine the failed node, it is necessary to check the peripheral nodes of the mechanism.

Detailed information why Webasto does not start can be found out using diagnostics using a computer. With the help of the program, we will know exactly everything about the error and get detailed information on how to fix it. After troubleshooting, the code must be reset using the diagnostic software. Otherwise, the unit will not start.

Webasto and diesel problems

Poor quality fuel quickly clogs the filter screen in the pump. As a result - a poor dosage of fuel, and then a cessation of supply. "Webasto" starts and stalls. Low-quality fuel negatively affects the candle, which cokes and no longer heats up to the required temperatures. If the Webasto installed on a diesel engine does not start, then the problems are completely similar to gasoline ICEs.

Thus, on diesel engines, the system may not work because of the fuel, which contains more sulfur. It cokes the candle even more than gasoline. Therefore, a diesel Webasto will fail faster than a gasoline one. In addition, there are cases when the Webasto does not start in the cold. The fact is that in winter diesel fuel thickens and cannot normallybe pumped through the fuel line to the combustion chamber of the heater. This is a common problem and there is nothing you can do about it. It is only necessary to clean the system and fill the tank with winter fuel.

Problem Solving and Troubleshooting

Often, when the Webasto does not start, the reasons may be hiding in the fuel supply. This happens in winter on diesel engines if the owner forgot to change the summer fuel to winter fuel. The heater can be quite serviceable - it can then work normally in a warm garage. When the device starts to work normally in the heat, it is necessary to change the diesel, then blow the system, clean it thoroughly, change filters and fill in new fuel.

There is another reason - this is the lack of fuel in the combustion chambers of the heater. If the Webasto installed on a diesel engine does not start, and the problem is not in the quality of diesel fuel, then the fuel does not reach the pump. In this case, the sound of the element will be quite loud and clear. Another reason may be air leakage if the fuel line is damaged. It is also recommended to check the solenoid valve - plugs often accumulate in it.

You can use an ohmmeter to check the air pressure. Normal numbers are 134-154 ohms. When carrying out diagnostics, any flushing liquid is fed into the tube. After the fuel system has been checked, the Webasto repair continues with electronics diagnostics. It is necessary to check the condition of the fuses F1 to F3. Burnt ones need to be replaced. After that, you should checkwhether the unit will work. Then check the operation of the timer. To do this, measure the current in its connector. If the voltage does not pass, then the timer must be completely replaced. Then the stove is checked, and they look at the condition of the terminals. They can be oxidized, which blocks the flow of current. Also check for integrity of all wires. Depressurization can be seen on the plug. Next, remove the blocks.

If Webasto does not start (GAZelle is no exception), then the unit may be blocked due to the fact that all errors have been fixed, but data about this has not yet entered the memory. Power is removed from the control unit for three seconds. This is done by removing the fuses. Then the element must be returned to its place. After that, you can turn on the device. Then the first two steps are repeated. If everything worked out, then the system will work normally. So you can solve the problem when Webasto starts and stalls after working for a couple of minutes. This behavior is due to blocks in the electronic control. Resetting and removing errors will help solve this problem.

Conclusion

As you can see, this is a useful device that helps a car enthusiast solve a lot of problems. Having experience in troubleshooting that occurs with the unit, you can successfully use it.