A4 Quattro Wagon L4-2.0L Turbo (CAEB) (2009)
Control Module HVAC: Description and Operation
A/C Control Modules
A/C Control Modules
‹› Different A/C components are not controlled directly by the A/C Control Head Climatronic Control Head (J255). For example the A/C
Compressor Regulator Valve (N280) is controlled by the Vehicle Electrical System Control Module (J519). The data is exchanged via the databus
system between both control modules Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
‹› The measured values of the different A/C components are not evaluated directly by the A/C Control Head Climatronic Control Head ( J255). For
example, the pressure signal from the A/C Pressure/Temperature Sensor (G395) is evaluated from the Vehicle Electrical System Control Module
(J519)and the measured values are sent via the data bus system to the A/C Control Head Climatronic Control Unit (J255) Vehicle Diagnosis,
Testing and Information System VAS 5051 in "Guided Fault Finding" function. Wiring diagrams, Troubleshooting & Component locations.