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:
Procedure:
  1. Start the function.
  2. A dialogue box shows test conditions, check these and press "OK".
  3. Current fuel pressure and pressure difference is shown, press "OK".
  4. The function is done.