Citroen Dispatch 2012

[Citroendispatch11]

Hi new to the forum but here goes

 

So compressor does not engage

 

Manually powered it will

Not low on gas and not to much either

Both fans working

Bsi module tested and told it's OK

BSM engine module swapped

No codes

 

Anyone have a wiring diagram?

 

Havnt tried a new control yet

Or the hedghog resistor which I believe is different from non AC versions having 4/5 pins could it be at fault

Have tried increasing temp to outside temp sensor as someone said could be measuring to low so won't engage

Wiring from compressor to engine fuse box all good

 

 

Where to start next ?

[paul.h]

Welcome to the forum.

 

I would take the van to a Citroen dealer and let them do a diagnostic check on it. The cost of it will be less than trying to replace lots of bits hoping to get it right before spending too much. They will be able to check if the refrigerant pressure sensors are working (high and low) and there is enough refrigerant, what temperature the various sensors are giving (if below about 6°C or the engine is high above about 110°C the air con is prevented from working) and probably actuate the compressor.

[Citroendispatch11]

Yes I can check those quite easily will check them

 

I have access to latest snapon diagnostics and lexia no codes present

 

Gas levels checked and ok

[Citroendispatch11]

Ok update hopefully will help others

 

Sensor on wing mirror measures outside temperature, allows compressor to engage around 8degrees , problem was mine is measuring -4 when it should read 6 so AC won't switch on until temp goes quite high

 

It is normal for AC to not switch on when temp is low but not when real temp example is 10degrees and sensor is reading 2

 

Anyhow I have some technical specs I will try and put up here for anyone to use as this setup is across a range of newer citroens

[paul.h]

Probably lucky the mirror temp sensor is the problem since this is possibly the lowest cost thing that could have been faulty.

[Citroendispatch11]

You can say that again , I seen the prices of everything else , temp sensor ten quid , funny place they put it, I just started noticing it on all the newer Citroen's drivers mirrors

[Citroendispatch11]

Here is some information may come in useful to others, i noticed theres no download section on this forum would be nice if possible

 

 

actuallt this isnt the file for aircon i mixed it up but i upload this for you anyway covers many vehicles for timing setup

timing dispatch.pdf

[Citroendispatch11]

Heres what i was meaning to post

 

mirror with temp probe and the air con wiring diagram

 

 

AC Wiring.pdf

mirror dispatch.pdf