R34 GTR climate control issue

[gtr-import]

Hello everybody , try to drive the AC on a R34 GTR , can't change the status trought any DI entry availlable on link G4+ i try all the config ( pull up on or off , low or high).

thanks for your help.

[Vaughan]

Are you trying to use DI 4 or a different input? If you are trying to use DI 4 it wouldn't surprise me if the AC controls have several other conditions before turning on the AC request signal to the ECU. Typically you will need the interior fan on, the pressure switch in the AC piping will need to be seeing pressure and the AC Evap temperature signal will have to be within an appropriate range.

[gtr-import]

Hi,

thanks for your reply,

yes i use D4 for clim input , i try also other DI input.

the aircon system is full of gas , so no reason to not have digital signal from the aircon control unit , i have also try another one , but no sucess .Maybe if something wrong , (faulty sensor) , DI signal is not sent form the unit to the ECU , but i didn't found how to put climate control in diag mode on the R34 GTR.

If somebody know how to do it , help will be apreciate .

 

Thanks

[Vaughan]

Did you have the engine running and the interior blower fan on? Have you tried both with the DI 4 pullup on and off?

[Adamw]

Also tell us what voltage you have on the AC request wire with AC on and off.