Fuel System Safety Precautions

Note the following When Working on the Fuel System:

WARNING:

The injection system is separated into a high-pressure section (maximum approximately 120 bar (1740 psi)) and a low-pressure section (approximately 6 bar (87 psi)).
Before opening the high pressure area, the fuel pressure must be reduced in the high pressure area. Refer to PRESSURE, REDUCING IN HIGH PRESSURE AREA .

WARNING:

There is a risk of injury due to the fuel being under pressure.

Place clean rags around the connection point before opening the fuel system. Then reduce the pressure by carefully loosening the connection point.
Wear safety gloves.
Wear protective eyewear.

Very hot fuel can cause burns.

In extreme cases, the temperature of the fuel lines and fuel can reach up to 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.

WARNING:

Danger due to leaking fuel.

Because the Transfer Fuel Pump -G6- runs briefly when the battery is connected and the driver door is opened, the power supply for the Transfer Fuel Pump -G6- must be disconnected before opening the fuel system.

CAUTION:

Risk of destroying electronic components when disconnecting the battery.

Follow the steps for disconnecting the battery. Refer to BATTERY, DISCONNECTING AND CONNECTING .

-- Procedure before opening the high pressure injection system. Refer to PRESSURE, REDUCING IN HIGH PRESSURE AREA .

To Prevent Personal Injury and Damage to the Fuel Injection and Ignition 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.
Fuel lines must not be opened when the engine is running.
The ignition must be switched off before connecting or disconnecting fuel injection and ignition system wiring or tester cables.
Wash the engine only when the ignition is turned off.

-- Disconnect the battery. Refer to BATTERY, DISCONNECTING AND CONNECTING .

Delete any DTC memory entries that came up during testing or assembly using the Vehicle Diagnostic Tester, in Guided Functions , Check DTC memory , and then Generate readiness code .