Audi / A3 (8P) / 08 - air-conditioning CAN (Climatic PQ35) / test of cooling output

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Mark	Model	Control unit	Diagnostic operation

Mark

Select a vehicle make or a common group such as Service Intervals, Engines, Transmissions, Immobilizers and Independent Heaters.

Model

Control unit Select the desired control unit as accurately as possible. The UDS identifier EV_xyz can be found in the VCDS after connecting to the control unit and then in the Extended Identification.

Select the desired control unit as accurately as possible. The UDS identifier EV_xyz can be found in the VCDS after connecting to the control unit and then in the Extended Identification.

Diagnostic operation Select the desired diagnostic procedure.

Diagnostic procedure

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Conditions:
- Basic settings = OK
- ambient temperature > XX°C
- engine temperature > XX°C
- radiator, condenser = clean
- V-belt = OK
- pollen filter = clean
- fuse = OK

connect with the control unit XX - Air-conditioning

Start the engine

set:
air-conditioning = OFF (ECON)
ventilation = OFF

XX - Measured values group XXX, XXX, XXX

required values - group XXX
field X = field X (air-conditioning - regulator valve)
field X = X rpm (air condition compressor - rotation)

observe values - group XXX
field X = ambient temperature

required values - group XXX

ambient temperature = XX°C | field X >= X.X bar
ambient temperature = XX°C | field X >= X.X bar
ambient temperature = XX°C | field X >= X.X bar
ambient temperature = XX°C | field X >= X.X bar
ambient temperature = XX°C | field X >= X.X bar

if values are not achieved group XXX field X:
- pressure sensor GXX - Test / replacement
- level of medium in the air-conditioning - Test

set:
press AC (ECON = OFF)
ventilation = X

XX - Measured values group XXX, XXX

required values - group XXX
field X = field X = X.X - X A (air-conditioning - regulator valve)
field X > X rpm (air condition compressor - rotation)

required values - group XXX
field X > X% (ventilation)
field X > X% (ventilation)

required values - group XXX

field X = rising value

set:
- air distribution at centre
- temperature = MIN
- recirculation = ON

XX - Measured values group XXX, XXX

required values - group XXX
field X = X - XX°C (vaporiser)

required values - group XXX
field X = group XXX field X + X°C
field X = group XXX field X + X°C
if values are not achieved

if values are not achieved group XXX field X,X:
- temperature sensor - Test / replacement

if values are not achieved group XXX field X:
- temperature sensor - Test / replacement
- level of medium in the air-conditioning - Test
- air condition compressor - Test

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