Even a small amount of contamination can lead to
malfunctions. Therefore, observe the following guidelines for
cleanliness when working on the A/C system:
Immediately seal the open lines and conne
The coolant circuit is bled according to specifications.
Refer to
→ Rep. Gr.19; Coolant System/Coolant; Coolant, Draining and
Filling
The engine is warm (the coolant temperature is h
Note
Depending on vehicle equipment, there are different versions
of the A/C system for the Audi Q7. Make sure to use the correct
version and pay attention to the allocation of different
"Low" A/C System Version
Note
There are different versions of the Audi Q7 A/C system
depending on the vehicle equipment.
Identifying features of a "Low" A/C system version
Front A/C Display Control Head -E87- version
-A-
There is no Rear A/C Display Control Head -E265- (version
-A- or
Ignition
A spark ignition (SI) engine requires a spark to initiate
combustion in the combustion chamber. Voltage is supplied to the
spark plug where the electricity will arc across a gap at a
voltage as high as 100 kilovolts. The ECM determines the precise
moment to fire each spark plug using ig