two return springs to guarantee the accelerator returns to the zero position when the pedal is
released. Whilst comparison checks are carried out on the accelerator pedal for rational
values, communications within the ECM are monitored for rational values and responses.
The ECM then provides an output, based on the accelerator pedal position, which drives a DC
motor which positions the throttle blade at the requested angle. The throttle blade position is
monitored by two sensors for rational value.
The acceleration control system has the necessary safety features to monitor the correct
operation of all the components. Depending on the failure state, the acceleration control
system can be put in appropriate safe state, from restricting the RPM to limphome mode.