S5 Quattro Coupe V8-4.2L (CAUA) (2009)
Expansion Valve: Testing and Inspection
A/C Compressor Regulator Valve, Checking Activation Signal
A/C Compressor Regulator Valve, Checking Activation Signal
‹› The test for a 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 describes checking a vehicle with a 6 Cylinder TDI engine ; the procedure can vary on vehicles with a different engine (4, 6 or 8
Cylinder engine).
Preparation
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Switch off ignition.
-
Remove front noise insulation.
Test Sequence
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Disconnect electrical connector - B - on A/C Compressor Regulator Valve (N280) - A -.
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Using an adapter cable from the Connector Test Kit (V.A.G 1594 C) recreate the connection between terminal - A - and terminal - B - on the A/C
Compressor Regulator Valve (N280).
‹› The A/C Compressor Regulator Valve (N280) is controlled by the Vehicle Electrical System Control Module (J519) on request of the Climatronic
control module (J255). Refer to A/C control head and Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding"
function.
‹› The above illustration shows a compressor where the connector - A - leading to the vehicle wiring harness is directly connected on the A/C
Compressor Regulator Valve (N280) (connector - B -). Depending on the compressor design, the connector - B - may also have a short wire.