Safety Precautions
Check for Technical Bulletins that may supersede any
information included in this manual.
WARNING
Failure to follow these instructions may result in
personal injury or po
On Board Diagnostics, or OBD, is an automotive term
referring to a vehicle's self-diagnostic and reporting
capability. OBD systems give the vehicle owner or repair
technician access to the status o
Windshield Defogger
The Windshield Defogger Control Module -J505- is activated
by the Comfort System Central Control Module -J393- at the
request of the Front A/C Display Control Head -E87-. This
request is sent via the data bus to the Comfort System Central
Control Module -J393-. The Comfort
Note
On vehicles with a high-voltage system but without a heat
pump (for example on Audi A3 e-tron, Audi Q5 hybrid, Audi A6
hybrid and Audi A8 hybrid) no check valves are installed in the
refrigerant circuit. On these vehicles valves are installed in
the refrigerant circuit which regulat
General Information
