Customer Safety Information

Motronic Injection System, Servicing

Safety precautions
Observe the following precautions if test and measuring instruments are required during a test drive:

WARNING:
- Test equipment must always be secured on the rear seat and operated from there by a second person.
- If test equipment is operated from the front passenger's seat, the occupant could be injured by the passenger's airbag in an accident.

To prevent injuries to persons and/or damage to the fuel injection and ignition system, the following must be noted:
- Always switch off the ignition before connecting or disconnecting injection or ignition system wiring or tester cables.
- To operate the engine at starting speed without actually starting it (for example, in order to test compression), unplug the connectors from the output stages for the ignition coils and also the connectors on the injectors.
- During some of the tests the control module may identify and record faults. The Diagnostic Trouble Code (DTC) memory should therefore be checked and (if necessary) erased after completing the tests and any repair work that may be required.

CAUTION: On vehicles equipped with Audi Telematics by OnStar(R) , switch-off the emergency (backup) battery for the Telematic/Telephone Control Module prior to disconnecting the vehicle battery. Switch-on the emergency (back-up) battery after reconnecting the vehicle battery.

- Always switch off the ignition before cleaning the engine.
- Always switch off the ignition before connecting or disconnecting the battery, otherwise the engine control module may be damaged.

WARNING: The fuel system is pressurized. Before loosening hose connections or opening the test connection (to measure fuel pressure), place a cloth around the connection. Then release pressure by carefully pulling off the hose or cap.