Audi A2 2001 - Page 162

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Determine and eliminate cause, for example by checking air
conditioner DTC memory.
– Observe test conditions.
– Check the A/C clutch -N25- voltage supply. If it is OK, repair
the A/C clutch.
– Check the actuation of the A/C compressor regulator valve -
N280- using Vehicle Diagnosis, Testing & Information System
-VAS5051B- (“OBD“ or “Guided Fault Finding for the A/C Sys‐
tem“) and ⇒ Heating, Ventilation and Air Conditioning; Rep.
Gr. 87 ; Diagnosis and Testing (vehicle-specific repair man‐
ual).
Note
♦ If the low pressure switch was removed to connect the service
station, bridge the electrical connections in the corresponding
connector for the pressure measurement.
♦ A/C compressor is driven by the engine via A/C Clutch -N25- .
♦ The A/C compressor regulator valve -N280- is actuated by the
Front A/C display control head -E87- or the Climatronic control
module -J255- . Check using Vehicle Diagnosis, Testing & In‐
formation System -VAS5051B- (“OBD“ or “Guided Fault Find‐
ing for the A/C System“) and ⇒ Heating, Ventilation and Air
Conditioning; Rep. Gr. 87 ; Diagnosis and Testing (vehicle-
specific repair manual).
Continuation Of Testing Depending On Design Of Refrigerant
Circuit
♦ Checking pressures for vehicles with restrictor and accumu‐
lator (with internally regulated compressor), refer to
⇒ “4.4.4 Checking Pressures For Vehicles With Restrictor and
Accumulator - Internally Regulated Compressor“, page 159 .
♦ Checking pressures on vehicles with expansion valve and fluid
reservoir (with internally regulated compressor), refer to
⇒ “4.4.6 Checking Pressures On Vehicles With Expansion
Valve and Fluid Reservoir - Internally Regulated Compressor“,
page 164 .
♦ Checking pressures for vehicles with restrictor, reservoir and
A/C compressor regulator valve -N280- (externally regulated
A/C compressor), refer to
⇒ “4.4.8 Checking Pressures On Vehicles with Restrictor,
Reservoir and A/C Compressor Regulator Valve - Externally
Regulated A/C Compressor“, page 171 .
♦ Checking pressures on vehicles with restrictor, accumulator
and A/C compressor regulator valve -N280- (externally regu‐
lated compressor), refer to
⇒ “4.4.10 Checking Pressures On Vehicles with Restrictor,
Accumulator and A/C Compressor Regulator Valve - Exter‐
nally Regulated Compressor“, page 178 .
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
158 Rep. Gr.00 - General, Technical Data