Audi Workshop Service and Repair Manuals

• ‒ Connect the fault reader V.A.G 1551 (V.A.G 1552) and use "Address word" 08 to select the air conditioner/heating electronics.
  (Connecting fault reader .)

• ‒ Enter "02" for function "Interrogating fault memory".

• ‒ Confirm entry with Q key.

• ‒ Press ⇒key.

Notes:

• ◆ If no faults have been detected and complaints have been received about the air conditioner (e.g. the compressor is not functioning or only functioning intermittently, system control unsatisfactory, fresh air blower speed cannot be regulated):
• ‒ 1. Read measured value block (Function 08) .
• ‒ 2. Perform final control diagnosis (Function 03)=> Page 01-46.

• ‒ 3.Check refrigeration capacity of air conditioner => Page 87-118.

The stored faults are displayed and printed in sequence when the printer is switched on.

Notes:

• ◆ If the printer is switched off, press the ⇒ key to display the next fault.
• ◆ If fault(s) was/were detected:
• ‒ 1. Rectify fault.
• ‒ 2. Interrogate fault memory (function 02).
• ‒ 3. Erase fault memory (function 05).
• ‒ 4. Check code (function 01) or encode control unit (function 07).
• ‒ 5. Perform basic setting (function 04).
• ‒ 6. Interrogate fault memory (function 02) and erase if applicable (function 05).
• ‒ 7. End output (function 06).

• ‒ Press ⇒key.

When the ⇒key is pressed, the program returns to its original status, as with "no fault detected".

• ‒ End output (Function 06) .
• ‒ Switch off ignition and detach diagnostic connector.