TT Roadster L4-2.0L Turbo (BPY) (2008)
Expansion Valve: Testing and Inspection
A/C Compressor Regulator Valve, Checking Switch-On Signal
‹› The test for an A/C compressor manufactured by "Denso" of type "6 SEU 14" is described in the following. Test is to be performed in the same
way for vehicles with a different compressor type or a different manufacturer.
‹› The following described the checking procedure on 2.0L TFSI vehicle and a 3.2L MPI vehicle. The procedure may vary on a different 4-cylinder
vehicle or on a 5- or 6-cylinder vehicle.
Preparation
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Switch off ignition.
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Remove the engine cover (for example, on 4-cylinder vehicles, where the connector is accessible from the top; not necessary on a 2.0L TFSI
vehicle).
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Remove the center noise insulation (for example, on 2.0L TFSI and 3.2L MPI vehicles, the connector is not accessible from the top).
Test Sequence
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Disconnect electrical connector - B - on A/C Compressor Regulator Valve (N280) - A -.
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Recreate the connection between connector - A - and connector - B - on A/C Compressor Regulator Valve (N280) using an adapter cable from
Connector Test Kit (V.A.G 1594 C).
‹› The measured current for activating the A/C Compressor Regulator Valve (N280) and the Climatronic Control Module (J255), which flows via the
A/C Compressor Regulator Valve (N280) is displayed in the measured values block. Refer to Vehicle Diagnosis, Testing and Information System
VAS 5051 under "Guided Fault Finding