Audi Workshop Service and Repair Manuals

The engine control unit will shut off the air conditioning compressor in the following cases:

• ◆ Heavy acceleration from low speeds (control unit detects angle change at sensor for accelerator pedal position and receives road speed signal)
• ◆ In the emergency program (emergency running mode)
• ◆ If coolant temperature is above 120 °C
• ◆ After every start, for approx. 6 seconds.

Test conditions

• ● Air conditioning system OK
• ● Air conditioner switched on
• ● No fault stored in fault memory

The air conditioner compressor should cut out within 5 seconds (visual check), then start and stop again every 5 seconds.

If the conditioner compressor is not switched off:

• ‒ → Connect test box V.A.G 1598/22 to wiring harness for engine control unit .

The following wiring connections are to be checked for open circuits and/or short to positive or negative.

• ‒ Rectify any open/short circuit as necessary.