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Home >> Jaguar >> 2004 >> XJ8 Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Servicing >> Descriptions & Operation >> Transmission Control Module (TCM) & Main Control Valve Body >> Transmission Shift Selection >> Cruise Mode

Cruise Mode

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.