R8 Quattro Coupe V10-5.2L (BUJ) (2010)
High Pressure Sensor / Switch: Testing and Inspection
A/C Pressure/Temperature Sensor, Checking Pressure Signal
‹› The refrigerant line cannot be checked when the A/C Pressure/Temperature Sensor (G395) is removed. The Climatronic Control Module (J255)
does not switch on the A/C compressor. Refer to vehicle diagnosis, testing and information system VAS 5051/ under "Guided Fault Finding".
Preparation
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Remove the headlamps.
Test Sequence
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Disconnect electrical connector - A -.
‹› The illustration shows the bumper and radiator air duct removed.
Routing for the 3-pin connector on the A/C Pressure/Temperature Sensor - A -.
1. Ground
2. Signal output - via the A/C system LIN Bus databus system to the Climatronic control module
3. Terminal 75 (positive)
‹› The A/C compressor (A/C Compressor Regulator Valve (N280)) is not actuated when the connector - A - is disconnected.
‹› The A/C pressure/temperature sensor is an electronic control module.