"" wrote: > Got my Pug 406 TDI (1.9) checked as far as aircon gas goes > today. I thought > it was low as the compressor pump did not seem to be kicking > in when I > pressed the aircon button on the dash (bulb on button is OK). > Gas pressure > was perfect when checked. > > It seems that not only is the compressor pump not kicking in > but the > radiotor fan is not coming on as well as it should do when > aircon is on. > > I'm thinking the fault is probably a relay or pressure switch > somewhere > because both the compressor and fan are not working when the > aircon is > turned on. > > Fan works 100% when just cooling the engine I should add. > > Any ideas as to the fault? > > > > -- > Please CC all replies and emails to me to > snipped-for-privacy@hotmail.com. This is unitil > further notice as I am having email > problems. Thanks!
Hi, Pins 1 & 4 should be closed representing gas pressure in system.
Pins 1 & 2 should be normally open, closes when gas pressure too great Pins 1 & 3 should be normally open, closes when gas pressure too great
Voltage should be present at pins 1 & 4.
If gas is present in system and there is no voltage at compressor clutch terminal there is no point in strapping a voltage there to prove a point, also on no account strap a voltage there if there is no gas in system. The main suspect is the dreaded BSI Built_in Sytems Interface I think it must contain a relay cos of the current required, but I?ve never looked at one. T