Checking fuel pressure in the accumulator
This function is used to check that the fuel pressure in the accumulator is consistent with the desired pressure.
At a constant engine speed, the pressure difference will be zero. At throttle opening, the difference will return to zero within a few seconds.
Note:
Fuel leakage or faulty fuel quantity valve or high pressure pump may affect how large the pressure difference is.
Test conditions:
Engine on.
Procedure:
Start the function.
A dialogue box shows test conditions, check these and press "OK".
Current fuel pressure and pressure difference is shown, press "OK".
The function is done.
If the function fails, check the test conditions and repair any faults.