A5 Cabriolet (8F7) L4-2.0L Turbo (CAEB) (2011)
Refrigerant Pressure Sensor / Switch: All Technical Service Bulletins
A/C - Blower Operates, System Does Not Cool/DTC's
87 Air conditioning inoperative
87 11 19
2020124/4
April 8, 2011.
Supersedes Technical Service Bulletin Group 87 number 10 - 05 dated August 24, 2010 for reasons listed below.
AFFECTED VEHICLES
CONDITION
Air conditioning is inoperative.
The HVAC blower functions normally.
Battery discharged, however, when charged, there is no bus silence when vehicle ignition is off.
TECHNICAL BACKGROUND
^ The A/C Pressure/Temperature Sensor G395 leaks refrigerant. This causes Sensor G395 to show an incorrect or implausible value when reading
MVBs. An incorrect signal or a low refrigerant level in the system can cause the air conditioning compressor to deactivate.
^ The LIN cable connecting the J519 Central Electrics Control unit to Sensor G395 is pinched or cut. This affects the A4/S4, A5/S5 Coupe and
Cabriolet, and Audi Q5 vehicles. The A6 and A8 are not affected by this type of failure.
^ The pressure sensor G395/G65 sends an incorrect signal that prevents bus silence and the battery is discharged.
Tip: Sensor G395 is a LIN slave of Vehicle Electrical System Control Module J519. Vehicle Electrical System Control Module J519 transfers the
information provided by the sensor via the comfort data bus to Climate Control Module J255.
PRODUCTION SOLUTION
An improved A/C Pressure/Temperature Sensor G395 was introduced into series production and the wiring manufacturer's processes were optimized.