w140 aircon codes
 

hi all, just done a code fault check on my 1994 s320 aircon and found EO 51, EO91 and E1 15. have looked for ony explination on threads but found nothing yet, can anyone point me in the right direction.
thanks

EO51: Left temp wheel, open or short circuit, EO91: A/C compressor ground activation, open or short circuit (intermittant fault), E115: Engine rpm increase diode matrix (V2), open or short circuit (intermittant fault).

Unless accompanied by a relavent symptom I would ignor all of them.

thanks, one massive omision i just noticed i made is that the aircon has no presure, pos leak or needing a recharge, do the errors make more sence now,
cant believe i missed including this small piece of info, :o

You should aproach the refrigeration as you would any other empty system. Clear the codes and write them down. Deal with what you have after the refrigeration is working again.

will do

Steve,

on a 1993 W124 500E, where is the engine RPM increase diode matrix V2, and what's the pn# ?

TIA,
:-) neil

I have the AC codes for your car in MENU#15.

JimF,

do you know where component location V2 is and possibly its part number ?

TIA,
:-) neil

Neil. . . . no sorry, I don't :(

I look around and let you know if I find it.