Fuel System Safety Precautions
WARNING: This page is about a different car, the 2016 Audi A6 Quattro. 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.
- Wear safety gloves
- Wear protective eyewear.
There is a risk of burns due to hot fuel.
- 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.
Fuel coming into contact with skin poses a health risk.
- Do not let fuel come in contact with bare skin. Wear fuel-resistant gloves.
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. Refer to the appropriate WIRING DIAGRAM or disconnect the battery.
Perform the following steps before starting work on the fuel system:
- The fuel tank may only be partially full. How much fuel can remain in the fuel tank may be read in the respective work description. Drain the fuel tank, if necessary. Refer to FUEL TANK, DRAINING .
- Before starting work, switch on exhaust extraction system and place an extraction hose close to the installation opening of fuel tank to extract escaping fuel fumes.
- If no exhaust extraction system is available, a radial fan (as long as motor is not in air flow) with a displacement greater than 15 m3 /h can be used.
WARNING:
Risk of accident due to the weight of the fuel tank.
- The fuel tank must be empty when removing and installing because of weight. Drain the fuel tank, if necessary. Refer to FUEL TANK, DRAINING .
To prevent personal injury and damage to the injection and pre-glow system, observe the following:
- Individuals with a pacemaker must not stay in the danger area of high voltage systems, for example ignition systems, xenon light.
- The ignition must be switched off before connecting or disconnecting injection and pre-glow system wiring or tester cables.
- Fuel lines must not be opened when engine is running.
- Wash the engine only when the ignition is turned off.
- Note the color coding when installing the coupling.
- The coupling must "audibly " engage when locking.
- Pull on the connections when they are connected to make sure they are secured correctly.
- Delete any Diagnostic Trouble Code (DTC) memory entries that occurred during testing or assembly. Refer to Vehicle Diagnostic Tester, Guided Functions , Check DTC Memory .
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 BATTERY .