Audi Workshop Service and Repair Manuals

Notes:

• ◆ Listed in the following in ascending order of 5-digit fault codes are all the faults which can be detected by the immobilizer and printed out on V.A.G 1551.
• ◆ Dash panel insert faults may also be displayed, as the immobilizer is an integral part of the dash panel insert.
• ◆ The fault code only appears on the printout.
• ◆ Before replacing components found to be defective, use current flow diagram to check wiring and connectors to these components as well as earth connections.
• ◆ On completion of repair work, always interrogate fault memory again with fault reader V.A.G 1551 and erase it.
• ◆ All static and sporadic faults are stored in the fault memory:
  A fault is recognised as being static if it is present for at least 2 seconds. If a fault is then no longer present, it is stored as being sporadic and "/SP" appears on the right of the display.
• ◆ After switching on ignition, all faults present are set to sporadic and only stored as being static if they are still present after checking.
• ◆ Sporadic faults are erased if they do not re-occur in the course of 50 driving cycles (ignition on for at least 5 minutes, vehicle speed > 30 km/h).
• ◆ When eliminating an open circuit in the event of a data bus fault, always remember to twist the two data wires of the corresponding bus system together to prevent electromagnetic interference.