Scan Tool and Test Equipment Safety Precautions

To reduce the risk of personal injury and/or damage to the fuel injection and ignition systems, always observe the following:
- Always switch off ignition before disconnecting or connecting lines of the fuel injection and ignition system, including test leads.
- If engine is to be cranked at starting RPM without starting (e.g. for compression testing), disconnect connectors from ignition coils and from fuel injectors.
- It is possible that a control module will recognize a malfunction and store a DTC during some tests. After completing all tests and repairs, DTC memory should therefore be checked and erased if necessary.
- Always switch ignition off before cleaning engine.
- Always switch ignition off before disconnecting or connecting battery. Failure to do so may damage the Engine Control Module (ECM).

If special testing equipment is required during road test, note the following:


WARNING!
- Due to weight, size and need for manual operation of test instruments while vehicle is driven on public roads, instrument must be used only with a Driver operating the vehicle and an Instrument Operator operating the test equipment.
- Do not use Instrument with Driver only Always use two persons to conduct test.
- Do not place Instrument on lap of Driver or front seat passenger because emergency stop may dislodge Instrument and cause airbag deployment with risk of injury to Instrument Operator.

Use of Instrument in Audi TT Coupe:
- Place Instrument in rear seating area and secure by available safety belt.
- Instrument Operator must be seated in the other rear seating position, after sliding front passenger seat and moving the seat back as far forward as possible. Do not activate the seat back release lever.
- Instrument Operator must wear safety belt.

Use of Instrument in Audi TT Roadster:
- Use only Instrument VAG 1551 Scan Tool (ST). DO NOT USE VAS 5051.
- Before test, deactivate passengers airbag using key operated switch in glove compartment or via OBD program
- Instrument Operator must be seated on passenger seat with safety belt worn.
- Place Instrument in foot well in front of passenger seat in a manner allowing the Operator to use the Instrument in a safe manner.
- After completion of test, re-activate front passenger airbag.