Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2007RS4 QUATTRO SEDAN (8EC) V8-4.2L (BNS)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCONTROL MODULE HVACTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSCLIMATRONIC CONTROL MODULE A/C CONTROL HEAD ELECTRICAL TESTHIGH PRESSURE SENSOR CONNECTOR ASSIGNMENT
2007 Audi RS4 Quattro Sedan (8EC) V8-4.2L (BNS)
High Pressure Sensor Connector Assignment
2007 Audi RS4 Quattro Sedan (8EC) V8-4.2L (BNS)SECTION High Pressure Sensor Connector Assignment
High Pressure Sensor Connector Assignment
Terminal - 1 - Ground (GND)
Contact - 2 - signal output (square wave signal to the Climatronic control module (J255) A/C control head )
Terminal - 3 - B+ (terminal "75")
• With harness connector - B - disconnected, the compressor will not switch on.
• High pressure sensor - A - is an electronic control module; it creates a square wave signal, the duty cycle ratio changes with pressure in the refrigerant circuit => [ High Pressure Sensor Pressure Signal ].
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.