Air conditioning failure

[katit]

Originally Posted by Weasel

Sometimes if the AUX fan is not working, the IHKA will not release the compressor to turn on.... worked on one today like that. Unfortunately you have to remove the whole front bumper to change the AUX fan.

And for a proper diagnosis bring it to the dealer or any other shop with the GT1 as you can look at ac request status and go through component activation to see if the ac compressor and aux fan work, etc. The proper test equipment makes a world of difference in the diagnosis process.

Ok, mine like that. I have simple AC system (manual). Fan is not on, clutch is not engaging.

I run GT1 and it shows that clutch "ON" shortly after AC button "ON". So, brains is clicking but there is no juice to fan/clutch.

How do I do "component activation" in GT1 manually?

[Weasel]

Originally Posted by katit

Ok, mine like that. I have simple AC system (manual). Fan is not on, clutch is not engaging.

I run GT1 and it shows that clutch "ON" shortly after AC button "ON". So, brains is clicking but there is no juice to fan/clutch.

How do I do "component activation" in GT1 manually?

We're talking about 2 different things... The AUX fan I was referring to is the electric fan in front of the radiator/condensor. There is no electric activation of the engine fan that is connected by the waterpump shaft. The clutch on that is thermostatically ativated by heat alone, and is designed to be released when not needed to reduce strain on the engine.

The clutch status you were seeing in status request was the compressor clutch, not fan clutch. In the control module functions you could click test modules or component activation (whatever it is called in the GT1 version you are using) and select auxillery fan or electric fan, whatever they call it in that version, and activate it. It usually gives you choises of 30%, 60% or 90% activation. I'd test all 3 output stages.