Fuel Supply System Safety Precautions
WARNING: This page is about a different car, the 2015 Audi A7 Quattro, 2014 Audi A7 Quattro, 2013 Audi A7, and 2012 Audi A7. However, it is still accessible from the selected car via links, so may be relevant.
Note the Following When Working on the Fuel Supply:
WARNING:
There is a risk of injury because the fuel is under very high pressure.
- Reduce the fuel pressure down to residual pressure before opening high pressure area of the fuel injection system. Procedure, refer to HIGH FUEL PRESSURE, REDUCING .
- To reduce remaining residual pressure, place clean cloth around the connector and carefully loosen connector.
To Prevent Personal Injury and Damage to the Injection and Ignition System, Observe the Following:
- The ignition must be switched off before connecting or disconnecting injection and ignition system wiring or tester cables.
- Wash the engine only when the ignition is turned off.
-- Delete any DTC memory entries that occurred during testing or assembly:
- The Vehicle Diagnostic Tester is connected.
-- Select the mode.
-- Press the Go to button and select the "Function/component selection" and the following tree structures one after the other:
- Drive
- 01 - On Board Diagnostic (OBD) capable systems
- Simos Fuel Injection and Ignition
- Functions
- Readiness code
CAUTION:
Risk of damaging electronic components when disconnecting the battery.
- Complete the steps for disconnecting the battery.
- Disconnect the battery only when the ignition is turned off, refer to REMOVAL AND INSTALLATION .
WARNING:
Danger due to leaking fuel
- Because the Transfer Fuel Pump -G6- runs briefly when the battery is connected and the driver's door is opened, the voltage supply to the Transfer Fuel Pump -G6- must be disconnected before opening the fuel system.
- Disconnect the power supply by removing the fuse for the Fuel Pump Control Module -J538- /fuel delivery unit => Wiring Diagram or disconnect the battery.