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Shifter A/T: Description and Operation






External Controls

COMPONENT LOCATION









INTRODUCTION
The external controls for the transmission consist of a JaguarDrive selector, two paddle switches and an emergency park release.
The JaguarDrive selector transmits driver transmission selections to the TCM (transmission control module). The paddle switches allow the driver to initiate gear shifts when the transmission is in the sequential shift manual mode. The emergency park release ensures the transmission is kept in neutral during vehicle recovery operations.

JAGUARDRIVE SELECTOR





The Jaguardrive selector is a rotary selector installed in the top of the JaguarDrive selector module. The JaguarDrive selector module is located in the floor console and controls the vehicle optimization functions on the vehicle. For additional information, refer to Ride and Handling Optimization Ride and Handling Optimization
The TCM (transmission control module) allows the transmission to be operated as a conventional automatic unit by selecting P, R, N, D on the JaguarDrive selector.
Rotation of the JaguarDrive selector allows the selection of P (park), R (reverse), N (neutral) and D (drive). By depressing the JaguarDrive selector and rotating clockwise from the D position, S (sport) mode can be selected. The JaguarDrive selector is fully electronic rotary transmission selector with no mechanical connection to the transmission.
The JaguarDrive selector rises from the JaguarDrive selector module once the engine is running. When the engine is stopped with the JaguarDrive selector in any position other than N, it retracts into the JaguarDrive selector module again. If the selector 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 JaguarDrive selector module. The selector also retracts if P is selected within the 10 minute period.
If the JaguarDrive selector does not rise from the console when the engine is started, but electrical power is supplied to the selector, the retracted selector can still be rotated to make selections. If electrical power to the JaguarDrive selector is lost, the selector will not rise from the console when the engine is started and the retracted selector will not rotate.
The JaguarDrive selector contains an internal interlock solenoid to prevent the selector from being rotated when the engine is not running.
The engine can be stopped with the JaguarDrive selector 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.

PADDLE SWITCHES





Two gear change 'paddle' switches are fitted at the rear of the steering wheel and allow the driver to operate the transmission as a semi-automatic manual gearbox using the Jaguar sequential shift feature.
Each paddle switch has 3 connections; ground, illumination PWM (pulse width modulation) supply and ground switch signal. The paddle switches are hardwired to the steering wheel audio switches. Operation of the paddle switch completes a ground path to the audio switch assembly. The audio switch assembly converts the completed ground signal into a LIN (local interconnect network) bus signal which is passed via the clockspring to the instrument cluster. The instrument cluster converts the signal into a high speed CAN (controller area network) bus signal to the TCM (transmission control module).
Pulling the LH (left-hand) downshift - paddle provides down changes and pulling the RH (right-hand) upshift (+) paddle provides up changes. The first operation of either paddle, after sport mode is selected, puts the transmission into permanent manual Jaguar sequential shift mode. Rotation of the JaguarDrive selector back to the D position, returns the transmission to conventional automatic operation.
Temporary operation of manual Jaguar sequential shift mode can also be operated with the JaguarDrive selector in the D position. Operation of either the upshift or downshift paddles activates the manual mode operation. If the JaguarDrive selector is in D, Jaguar sequential shift will cancel after a time period or can be cancelled by pressing and holding the + paddle for approximately 2 seconds.

EMERGENCY PARK RELEASE









The emergency park release consists of an operating lever that is connected to a park interlock lever on the transmission by an upper and lower cable assembly.
One end of the operating lever is attached to a base by a hinge pin. A locking cylinder is installed in the other end of the operating lever, to secure the operating lever to the base. A strap is attached to the operating lever, next to the locking cylinder, to pull on when raising the operating lever. The base is installed on top of the transmission tunnel, under the cubby box of the floor console. An access panel for the operating lever is located under the twin cup holder in the cubby box.
The park interlock lever is attached to the transmission selector shaft.

When operated, the emergency park release turns the transmission selector shaft and locks the transmission in neutral.
In the event of the vehicle requiring recovery, the park lock can be released manually with the use of the emergency park release mechanism. To release the park lock:
- Remove the trim cover from the rear of the floor console and locate the emergency park release lever.
- Rotate the locking mechanism of the lever 90 degrees counterclockwise.
- Apply the footbrake, pull the lever upwards and ensure it is locked in the vertical position.
Raising the emergency park release lever causes the emergency park release cable to rotate the park interlock lever on the transmission, which disengages the parking pawl and engages neutral. This allows the vehicle to freewheel.
To re-engage the park lock:
- Hold the strap on the emergency park release lever, release the latch and lower the lever to the horizontal position.
- Lock the lever by turning the locking mechanism 90 degrees clockwise.
- Install the trim cover.

CONTROL DIAGRAM

NOTE:
A = Hardwired; D = High speed CAN (controller area network) bus; O = LIN (local interconnect network) bus









PRINCIPLES OF OPERATION
Four additional switches are located adjacent to the JaguarDrive selector and control the JaguarDrive control functions. For additional information, refer to Ride and Handling Optimization Ride and Handling Optimization

JaguarDrive Selector
Rotation of the JaguarDrive selector to any of the five positions is sensed by the TCM (transmission control module) via the high speed CAN (controller area network) bus. A LIN (local interconnect network) bus connection is also provided but is only used in the event of a CAN (controller area network) bus failure as a back-up. The TCM (transmission control module) then reacts according to the selected position. The JaguarDrive selector is a magnetic system using Hall effect sensors to determine the position of the selector.
The S position selection allows the TCM (transmission control module) to operate the transmission using the semi-automatic Jaguar sequential shift. Gear selections are sensed by the TCM (transmission control module) when the driver operates the steering wheel paddle switches. Once the JaguarDrive selector position is confirmed, the TCM (transmission control module) outputs appropriate information on the high speed CAN (controller area network) bus which is received by the instrument cluster to display the gear selection information in the message center. For additional information, refer to Information and Message Center
The paddles can also be used on a temporary basis when the JaguarDrive selector is in the D position to override the automatic gear selection if required.

PARK INTERLOCK AND NEUTRAL LOCK
Neutral lock is a new feature introduced as a requirement for the JaguarDrive selector. The selector is always locked at ignition on when the engine is not running, except after an engine stall when the selector is not in P or N.
If, when driving with the JaguarDrive selector in S, D or R at a speed of more than 5 km/h (3 mph), the driver selects P or N:
- Without the brake pedal pressed, the JaguarDrive selector will be immediately locked once the vehicle speed falls to below 5 km/h (3 mph).
- With the brake pedal pressed, the JaguarDrive selector will remain locked for as long as the brake pedal remains pressed, regardless of vehicle speed.
The transmission will only engage park once the vehicle speed is less than 2 km/h (1 mph).
If the driver selects N and releases the brake pedal with a vehicle speed of less than 5 km/h (3 mph), the JaguarDrive selector will be locked 2 seconds after N is selected. The selector will remain locked until the driver presses the brake pedal again.
To ensure that a driver request to change from a non-driving range (N for example) to a driving range (D for example), the park interlock and neutral lock features are used in conjunction with the intermediate position.
If the transmission receives a range change request without the brake pedal pressed, the TCM (transmission control module) initiates a soft lock function. The transmission will remain in park or neutral, depending on the starting position.
If a transmission position letter is flashing in the message center and the vehicle has no drive, the driver must:
- Press the brake pedal.
- Reselect N or P on the JaguarDrive selector.
- Select the required driving range, ensuring that the brake pedal is pressed.

Rocking Function
The rocking function is a new feature introduced to compliment the neutral lock function. For all changes from a non-driving range to a driving range, it is necessary to press the brake pedal (to release either the park interlock or neutral lock).
In situations where the driver will require to change the gear selection from R to D, or from D to R, without brake pedal input (car park maneuvering, 3 point turns or 'rocking' the vehicle from a slippery surface for example), the rocking function gives a 2 second lock delay when N is selected on the JaguarDrive selector and the brake pedal is not pressed.

Intermediate Position
If the JaguarDrive selector is rotated slowly from P to S and back to position P with the brake pedal pressed, the R or D position display letter in the message center will flash and the transmission will remain in park or neutral depending on the previous starting position of the selector.
If the brake pedal is released when R or D is flashing in the message center and the JaguarDrive selector is rotated to the R or D position, the required range will not be selected and the transmission will remain in park or neutral, depending on the previous starting position. This feature is known as soft lock.
If the driving range letter in the message center is flashing and the vehicle has no drive, the driver should depress the brake pedal to reselect N or P, and then select the required driving range while the brake pedal remains pressed.

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