Kickdown Switch (where fitted)
WARNING: This page is about a different car, the 2002 Jaguar XK8 and 2001 Jaguar XK8. However, it is still accessible from the selected car via links, so may be relevant.
Kickdown is intended to provide maximum vehicle acceleration, via the appropriate downshift(s), when the operator uses full throttle. A kickdown switch provides an electrical signal to the TCM when the accelerator pedal is fully pressed. The switch is normally open, connected to vehicle ground. Should the switch fail the TCM will detect kickdown using the accelerator pedal position.