Hello. I have a 2011 LTZ Suburban. A/C not working.
I connected the tester and the status is "Withheld".
Gas pressure OK.
Pressure sensor OK.
I wonder about the temperature:
EVAP air TEMPERATURE Raw -39.5 degrees Celsius
And a few others are also in the red. Where to look for the problem.

 

Hello. I have a 2011 LTZ Suburban. A/C not working.
I connected the tester and the status is "Withheld".
Gas pressure OK.
Pressure sensor OK.
I wonder about the temperature:
EVAP air TEMPERATURE Raw -39.5 degrees Celsius
And a few others are also in the wired temp. Where to look for the problem.Maybe someone has a diagram for this car model?

 

Do not double post please. (Threads merged)

diagrams can be found on charm.li

 

Ok. Sorry.
I checked the resistance of all temperature sensors with a multimeter. And all according to resistance are positive. And the HVAC panel, during diagnosis with a tester, displays some temperatures well below zero. Can the Panel be so damaged???