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Home >> Audi >> 2016 >> S6 Prestige >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> Climate Control System (Precautions & General Information - CAEB, CGXB, CEUC, CTUA, CEUC, CAED, CHJA, CPNB, CRDB, CPNB, CREC, CTGE, CYNB, CWUC, CREH, CWUB) >> 00 General, Technical Data >> Repair Information >> General Repair Information >> A/C Components Controlled Or Activated By Other Control Modules, Electrical Tests

A/C Components Controlled Or Activated By Other Control Modules, Electrical Tests

NOTE:

Various components for the Air Conditioning (A/C) system are no longer controlled from the Climatronic Control Module -J255- control head. The A/C Compressor Regulator Valve -N280-, for example, is controlled by the Vehicle Electrical System Control Module -J519-. The data is exchanged via the data bus between the two control modules. Use the Vehicle Diagnostic Tester in "Guided Fault Finding"  function.

The measured values of various components for the A/C system are no longer measured from the Climatronic Control Module -J255- control head. Therefore, for example, the pressure signal from the A/C Pressure/Temperature Sensor -G395- is evaluated by the Vehicle Electrical System Control Module -J519- and the measured values are sent via the data bus to the Climatronic Control Module -J255-. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding"  function and to the appropriate WIRING DIAGRAM.

The refrigerant pressure sensor has a different designation, depending on the vehicle. The sensor is designated as High Pressure Sensor -G65- on the Audi A6 e-tron. It exchanges the data with the Thermal Management Control Module -J1024- on this vehicle. On all other vehicles (except for the Audi A6 e-tron), the sensor is designated as the A/C Pressure/Temperature Sensor -G395-. For these vehicles, it exchanges data with the Climatronic Control Module -J255- control head. Refer to the appropriate WIRING DIAGRAM.

A start-stop system is available for certain engines for this vehicle. The setting on the Climatronic Control Module -J255- control head can prevent the Stop function. If, for example, "defrost" is selected, the stop function is not possible or will be interrupted and the engine will start. The same applies in the case of heating and cooling. The difference between the target and actual temperature is greater than a specified value. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding"  function.

Certain A/C system functions can be switched on and off via the MMI (Multi Media Interface) under the "A/C system" function in the "car" / "car systems" menu. The A/C system control can also be influenced via presettings in the MMI (Multi Media Interface) under the "A/C system" function in the "car" / "car systems" menu. Therefore, first check the presetting in the MMI in the case of a problem with these components. Refer to Infotainment/MMI Operating Instructions.

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