Safety Precautions

Safety Precautions

To prevent injuries to persons and/or damage to the fuel injection and ignition system, note the following points:
- Always switch off the ignition before connecting or disconnecting injection or ignition system wiring or tester cables.
- In order to run the engine at starting speed without actually starting it (for example, to test compression), unplug the connectors on the ignition coils and also the connectors on the injectors.
- During some of the tests the control module may identify and store a fault. 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. The readiness code must be generated after erasing the Diagnostic Trouble Code (DTC) memory.
- 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.

Note the following points if test equipment is used during a road test:

WARNING:
- To avoid any risk of accident, observe the following precautions when using test instruments while road testing the vehicle:
Audi TT Coup:
- Use only VAS 5051 or V.A.G 1551 to read measured value blocks. The tester must always be secured on the rear seat and operated from the rear seat by a second person.
- Due to the limited space, slide the front passenger's seat forward as far as it will go and (without pulling the release lever) incline the backrest as far forward as possible by turning the adjuster knob. Do not operate the release lever to tilt the backrest forward.
Audi TT Roadster:
- In the Audi TT Roadster, use only V.A.G 1552 and with the front passenger's airbag switched off.
- Switch off the front passenger's airbag by means of the key-operated switch in the glove box.
- Switch on front passenger's airbag after testing has been completed.

WARNING: Fuel system is under pressure. Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection.