This function is used to reduce the fuel pressure. The pressure must be reduced before working on the high-pressure part of the fuel system.
Note:
The fuel system has a very high pressure, up to 3000 bar. The fuel pressure must be reduced before any work can begin. The system should always be considered as pressurized. If the brake pedal is activated, the function is canceled.
Test conditions:
Ignition on, engine off.
The clutch and brake pedals must be released.
Procedure:
Start the function.
A dialogue box shows test conditions, check these and press "OK".
To reduce the fuel pressure, press "OK".
Press "OK" to exit the function.
If the function fails, check the test conditions and repair any faults.