Hi all friends. The other day I noticed that even when it's not hot, the fan runs at full power
When I checked the error, the error is actual
Error P059700. Cooling system thermostat has an electronic malfunction or an open circuit
Thermostat must open valve within 92-93 degrees
Right now the valve hasn't opened yet. Already the fan is on and the valve is not open again
The valve is open.
Let me tell you about the operation of the thermostat and the entire cooling system
The temperature you see on the dashboard is not the actual temperature.
Diagnostic scanner shows a temperature of 72 degrees
At this point the dashboard is 10 degrees higher (83 degrees). The difference is 10 degrees.
Now already on the dashboard temperature, 92 degrees
On the dashboard, the temperature ranges from 92 to 94 degrees. Let me explain why.
When the system reaches 82 degrees or higher, the dashboard stays at 92 degrees
As soon as the system temperature rises above 97 degrees, the temperature on the dashboard becomes 93 degrees
The thermostat valve opens when the system temperature reaches 102 degrees. The dashboard also shows 93 degrees
102 degrees and the valve opens. temperature starts to drop
On the dashboard also the temperature drops to 92 degrees
I showed you this so you know how the cooling system works
The temperature on the dashboard goes up to 94 degrees when the system temperature is already 105 degrees
B11/4 is exactly the coolant sensor
And now I'll show you how to do the thermostat test
Drive type + motor module + tests. All done via Openport
When the temperature reaches 65-70 degrees, the check will start automatically
Checking starts automatic and takes 6 minutes
After the check it looks like the thermostat is ok
But still the error is actual
In what situations does this error appear
Error P0597 appears, the automatic transmission control module detects a problem related to the engine thermostat
This error code usually indicates a short or open circuit in the thermostat heater control circuit
Error codes P0598 and P0599 can also appear together with code P0597
P0597 error usually appears in German cars, such as Mercedes, BMW, Volkswagen, Mini, Jaguar, and Opel
The most common cause of error P0597 is the presence of damaged or corroded electrical connectors
Could also be a faulty thermostat, coolant leakage, short circuit or broken wires around the thermostat
There is also the possibility of failure of the engine control system, "Motronic", but this is extremely rare
Before replacing the system, consider all possible causes of the error
If the fluid level is low, the thermostat can overheat and this can cause this error code
My level was lower and I added distilled water, but the problem remained
Also checked several times and did not see any leaks. Will be checking the electrical connectors
The most common error in diagnosing code P0597 is replacing the thermostat, while the problem is damaged or faulty electrical circuits
This error is not considered very serious as long as its occurrence is not life threatening to the driver. If the engine overheats, it can cause serious damage to its components
I'll check what caused the error.
If it's the thermostat, I'll make a video to replace the thermostat
Thank you all and good luck on the road