Temperature Display: Accurate Readings & More

Hello everyone.


I think my coolant temperature gauge in the instrument cluster is broken.

How can I read this information using the 'climate control display'? Am I correct in assuming that parameter 51 refers to the engine temperature?

I could at least rule out the sensor in that case...

Or is there a dedicated sensor?



Best regards, Sepp.

A4, 2.5L, AFB; I'm seriously considering getting rid of the car...
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Evil or Very Mad.

Yes, the channel is correct. That is the actual cooling water temperature.

The coolant sensor is a dual sensor. It provides one reading for the instrument cluster (KI) with user-friendly values, and another reading for the engine control module (MSTG) with the correct temperature.

Yes, the channel is correct. That is then the actual cooling water temperature.

The coolant sensor is a dual sensor. It provides one reading for the KI (instrument cluster) with user-friendly values, and another reading for the MSTG (module software test group) with the correct temperature.


So, I think I've already checked the one for the engine...

Where exactly is the sensor located?


Regards,

Sepp.

It's located on the "belly" of the expansion tank. It's a 4-pin connector.

On the 'belly' of the expansion tank. There is a 4-pin connector.


I found the sensor at the front, under the engine cover... I think it's a blue connector with 4 pins. It's strange that the climate control still showed 27°C even after I disconnected it.

I just checked, and parameter 51 refers to engine temperature. It seems there's probably another sensor involved.

I will be parameter 58 tomorrow. Hopefully, that will be the correct one...


I measured 2.2k ohms at one connection and 1.2k ohms at the other. Is the sensor broken?

Regards,

Sepp.

harj wrote:

bastion wrote: On the "belly" of the expansion tank. There is a 4-pin connector. I found the sensor located at the front, under the engine cover... I think it's a blue connector with 4 pins. It's strange that the climate control still showed 27°C even after I disconnected it. I just checked, and parameter 51 refers to engine temperature. It seems there's probably another sensor involved. I will be parameter 58 tomorrow. Hopefully, that will be the correct one... I measured 2.2k ohms at one connection and 1.2k ohms at the other. Is the sensor broken? Regards, Sepp

I'm only familiar with this from Peugeot/Citroen and BMW, where there's a separate sensor on the radiator for the air conditioning system. Could this be the case here as well?