A/C Compressor Regulator Valve -N280-, CHECKING SWITCH-ON SIGNAL: Notes

The following describes the test for an A/C compressor manufactured by "Denso" of type "6 SEU 14" without A/C Clutch -N25-. The test is to be performed in the same way for vehicles with a different compressor type or a different manufacturer.

However, for an A/C compressor with an A/C Clutch -N25-, a 3-pin connector may be installed. Refer to Wiring Diagram.

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).

Not installed on an electrically-driven A/C compressor. Refer to appropriate service information. .

Certain malfunctions at the A/C Compressor Regulator Valve -N280- (for example, a stuck valve or a short circuit in the coil) can lead to a complaint regarding the A/C compressor (A/C system is not cooling, the evaporator ices over, etc.). If the A/C Compressor Regulator Valve -N280- (and not the A/C compressor itself) is the cause, the A/C compressor can be serviced by replacing the A/C Compressor Regulator Valve -N280-. Refer to REFRIGERANT CIRCUIT COMPONENTS, REPLACING .

The A/C Compressor Regulator Valve -N280- is not available as a replacement part for all A/C compressors. If the A/C Compressor Regulator Valve -N280- is not available as an individual A/C compressor part (different versions), then the entire A/C compressor must be replaced if there is a complaint. Refer to the Parts Information.

To replace the A/C Compressor Regulator Valve -N280- on an A/C compressor with an A/C Clutch -N25-, any connector terminals must be removed from the connector housing on the A/C Compressor Regulator Valve -N280-. Refer to REFRIGERANT CIRCUIT COMPONENTS, REPLACING .