Acceleration Control - Description & Operation

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Jaguar XKR, 2006 Jaguar XK8, 2005 Jaguar XKR, 2005 Jaguar XK8, and 2004 Jaguar XKR. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Accelerator pedal, right-hand drive vehicles

Courtesy of JAGUAR CARS, INC.

Fig 2: Accelerator pedal, left-hand drive vehicles

Courtesy of JAGUAR CARS, INC.

When the accelerator pedal is pressed, the engine control module (ECM) monitors the angle of the accelerator pedal through the accelerator pedal position (APP) sensor. Refer to Electronic Engine Controls article. The APP sensor is connected to the accelerator pedal through an accelerator cable.

The ECM then provides an output, based on the accelerator pedal position, which drives a DC motor to position the throttle to the required angle. The throttle position is monitored by two sensors for rational value.

The ECM has the necessary safety features to monitor the correct operation of all the components. Depending on the failure state, the ECM can put acceleration control system into an appropriate safe state, from restricting the RPM to limphome mode.