Audi Q7 Owners & Service Manuals

Audi Q7: Safety Precautions

Safety Precautions when Working on the High-Voltage System

High Voltage is Extremely Dangerous.

The high-voltage system is under high voltage. Electrocution can cause death or very serious personal injury.

- Individuals with electronic/medical life and health sustaining machines in or on their person cannot perform any work on high-voltage systems. Life and health sustaining machines are for example pain killer pumps, implanted defibrillators, pacemakers, insulin pumps, and hearing aids.

- Have the high-voltage system de-energized by a qualified person.

There is a Risk of Injury Due to the Engine Starting Unexpectedly.

On electric and hybrid vehicles an active ready mode is difficult to identify. Parts of the body can be pinched or pulled.

- Switch off the ignition.

- Place the ignition key outside of the vehicle interior.

Risk of Damaging the High-Voltage Cables.

Misuse can damage the insulation of high-voltage cables or high-voltage connectors.

- Never support objects on the high-voltage cables and the high-voltage connectors.

- Never support tools on the high-voltage cables and the high-voltage connectors.

- Never sharply bend or kink the high-voltage cables.

- When connecting pay attention to the coding of the high-voltage connectors.

Safety Precautions when Working near High-Voltage Components

High Voltage is Extremely Dangerous.

The high-voltage system is under high voltage. Electrocution can cause death or very serious personal injury from damaged high-voltage components and high-voltage cables.

- Perform a visual inspection of the high-voltage components and the high-voltage cables.

- Never use tools that are for cutting, deformed, or sharp edged.

- Never weld, solder or use thermal adhesive or hot air.

Safety Precautions when Working on Vehicles with Start/Stop System

There is a risk of injury due to the engine starting unexpectedly.

The engine can start unexpectedly on vehicles with an activated Start/Stop System. A message in the instrument cluster indicates whether the Start/Stop System is activated.

- Deactivating the Start/Stop System: Switch off the ignition.

Safety Precautions for Pyrotechnic Components


Pyrotechnic components:

  • Airbag units
  • Belt Tensioner
  • Seat belt force limiter (depending on vehicle equipment)
  • Battery cut-out elements (depending on vehicle equipment)



  • Testing, assembly, and repair work may only be performed by qualified personnel.
  • There is no change interval for airbag units.
  • Never test with a test light, volt meter or ohm meter.
  • The pyrotechnic components may be checked only when they are installed and by using a manufacturer approved Vehicle Diagnostic Tester.
  • When working on the Airbag System (pyrotechnic components, Airbag Control Module -J234-, wiring), the battery ground cable must be disconnected WITH THE IGNITION SWITCHED ON. Then cover the negative terminal.
  • Wait for 10 seconds after disconnecting the battery.
  • The ignition must be SWITCHED ON when connecting the battery. Nobody should be inside the vehicle with doing this. Exception: Vehicles with a battery inside the passenger compartment.
  • If the ignition is not switched on after the battery is reconnected - the warning lamps in the instrument cluster do not turn on - the ignition (key/button) may be switched on while sitting on the driver seat with the seat all the way back.
  • Follow the steps after connecting the battery. Refer to → Electrical Equipment; Rep. Gr.27; Battery; Battery, Disconnecting and Connecting.
  • Before handling pyrotechnic components of the restraint system, for example, before disconnecting the connector, the technician must discharge static electricity. Touching grounded metal parts, for example, touching the door striker, will discharge the static electricity.
  • Wash hands after touching ignited restraint system pyrotechnic components.
  • Pyrotechnic components may not be opened nor repaired; always use new parts (risk of injury).
  • Pyrotechnic components that have fallen onto a hard surface or show signs of damage must not be installed in vehicle.
  • Pyrotechnic components should be installed immediately upon removal from shipping package.
  • If the work must be stopped for awhile, put the pyrotechnic component back into its shipping package.
  • Do not leave the pyrotechnic component out unattended.
  • When connecting restraint system pyrotechnic components, only the person performing the work should be in the vehicle.
  • Do not use any grease, cleaning solutions or similar on pyrotechnic components.
  • Replace the airbag unit if any contaminants such as oil, grease, paint, dye or solvents have penetrated the fabric.
  • Pyrotechnic components must not be exposed to temperatures over 100 ºC (212 ºF), even for a short time.

Special Information Regarding Driver and Front Passenger Airbags

  • Store the driver and front passenger airbag units in the uninstalled state so that the cushioned side faces upward.

When replacing airbag units, the following sequence must be followed exactly:

1 - Remove the old airbag unit and store with the upholstered side facing up.

2 - Remove the new airbag unit from the transport container and store it with the upholstered side facing up.

3 - Place the old airbag unit in the transport container immediately.

4 - Install the new airbag unit in the vehicle.

Belt Tensioner Special Notes

  • Use extreme care when removing and installing belt tensioner units. Handling belt tensioner units improperly is very dangerous and could result in serious personal injury.
  • Belt tensioner units that are mechanically damaged (dents, cracks) must always be replaced.
  • The open end of the belt tensioner should never be pointed at anyone.
  • When connecting a belt tensioner, all mechanical parts, including those in the three-point seat belt, must be secured correctly. If it is not possible to connect the belt tensioner because of insufficient space, the seat belt webbing must be rolled up completely prior to connection. In this case there is no increased safety risk, if all other safety instructions are followed. In particular, this includes the Notes regarding the disconnection of the battery and the static discharging of the technician prior to connection of the belt tensioner.
  • Even after a crash, it is possible that the belt tensioner ignited, but the belt force limiter did NOT. Treat these components as if they had not ignited!


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