Stuck Detection

Stuck Detection
Stuck at monitoring executes when closed loop fuel pump control is executing. It checks that the fuel rail pressure signal has varied by at least 5 kPa over a range of demanded fuel pump duties. The maximum and minimum fuel rail pressures are updated each time. The change in demand duty is integrated and when the integral reaches 4%, the variation between the max and min values is checked. If it is less than 5 kPa, failure judgement is made; otherwise a normal judgement is made.