Transmission Control Switch (TCS)
Rotation of the TCS (Transmission Control Switch) to any of the five positions is sensed by the TCM (Transmission Control Module) via the HS (High Speed) CAN (Controller Area Network) Powertrain bus. The TCM then reacts according to the selected position. The TCS is a magnetic system using Hall effect sensors to determine the position of the switch.
The 'S' (sport) position selection allows the TCM to operate the transmission using the semi-automatic Jaguar sequential shift. Gear selections are sensed by the TCM when the driver operates the steering wheel paddle switches. Once the TCS position is confirmed, the TCM outputs appropriate information on the HS CAN Powertrain bus which is received by the IC (Instrument Cluster) to display the gear selection information in the message center. Refer to: INFORMATION AND MESSAGE CENTER
The paddles can also be used on a temporary basis when the TCS is in the 'D' (drive) position to override the automatic gear selection if required.
The TCS is a rotary selector installed in the JDS (Jaguar Drive Switchpack). The JDS is located in the floor console and also controls the vehicle optimization functions on the vehicle. For additional information, refer to:
By selecting 'P', 'R', 'N', 'D' or 'S' on the TCS, the transmission functions as any conventional automatic unit.
Rotation of the TCS allows the selection of 'P', 'R', 'N' and 'D'. By depressing the TCS and rotating clockwise from the 'D' position, 'S' mode can be selected. The TCS is a fully electronic rotary transmission selector with no mechanical connection to the transmission.
The TCS rises from the JDS once the engine is running. When the engine is stopped with the TCS in any position other than 'N', it retracts into the TCS module again. If the TCS is in position 'N' when the engine is stopped, it remains in the raised position for up to 10 minutes, for use in a drive through car wash for example. After 10 minutes the selector automatically retracts into the JDS. The selector also retracts if 'P' is selected within the 10 minute period, or the vehicle is locked.
If the TCS does not rise from the console when the engine is started, but electrical power is supplied to the TCS, the retracted TCS can still be rotated to make selections. If electrical power to the TCS is lost, the TCS will not rise from the floor console when the engine is started and the retracted TCS will not rotate.
The TCS contains an internal interlock solenoid to prevent the TCS from being rotated when the engine is not running.
The engine can be stopped with the TCS in any position. Once the engine is stopped the selector will automatically reset to the 'P' position and the transmission park lock will be engaged, except if the selector is moved to the 'N' position when the engine is stopped.