Cruise Mode
WARNING: This page is about a different car, the 2005 Jaguar XJR, 2005 Jaguar XJ8, 2004 Jaguar XJR, and 2004 Jaguar XJ8. However, it is still accessible from the selected car via links, so may be relevant.
When the driver engages the cruise control system the TCM receives a CAN message transmitted by the Adaptive Cruise Control (ACC) or engine electronic controls which informs the TCM that cruise control is currently active. Upon receipt of this message the TCM selects a new transmission shift map. This map has been developed to reduce busy gearshift during cruise mode. It has also been developed to increase fuel economy.