Working On Fuel System
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 Audi Q7, 2014 Audi Q7, 2013 Audi Q7, 2011 Audi Q7, and 2010 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
Note the following when working on the fuel system:
WARNING:
There is a risk of injury because the fuel is under pressure.
- Place rags around the connection before opening the system. Then release pressure by carefully loosening the connection.
Very hot fuel can burn your skin.
- For safety reasons, if the battery is >>not<< disconnected, the Fuel Pump Control Module -J538- fuse must be removed before opening fuel system. Otherwise, the fuel pump will be activated by the driver door contact switch.
- The temperature of the fuel lines or fuel may reach 100 °C (212 °F) after stopping the engine. Let the fuel cool down before opening any line connections otherwise there is a danger of scalding.
- Wear safety gloves
- Wear protective eyewear.
To prevent personal injury and damage to the injection and pre-glow system, observe the following:
- The ignition must be switched off before connecting or disconnecting injection and preglow system wiring or tester cables.
- Wash the engine only when the ignition is turned off.
- If the connectors were disconnected and the engine was started, then malfunctions have been stored in the Diagnostic Trouble Code (DTC) memory/Engine Control Module (ECM): Check DTC Memory in Guided Functions , refer to Vehicle Diagnostic Tester.
CAUTION:
Risk of damaging electronic components when disconnecting the battery.
- Complete the steps for disconnecting the battery.
- Always turn off the ignition before disconnecting the battery.
Disconnect the battery, refer to BATTERY, DISCONNECTING AND CONNECTING .