Drivers Selector Module "J" Gate

WARNING: This page is about a different car, the 2003 Jaguar XJ8, 2003 Jaguar XJ, 2002 Jaguar XJ8, 2002 Jaguar XJ, and 2001 Jaguar XJ8. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Driver's Selector Module "J" Gate Components

Courtesy of JAGUAR CARS, INC.

The gear selector lever:

Has seven positions: Park, Reverse, Neutral, Drive, Fourth, Third and Second.
Operates the transmission selector shaft and rotary switch, in all positions (except Drive-to-fourth) by means of a Bowden cable.
Passes driver gearshift requests to the transmission control module via the rotary switch.

The Drive-to-fourth switch:

Detects when the gear selector lever is moved from Drive to Fourth.
Is hard-wired to the transmission control module.

The Neutral position switch:

Is hard-wired to the body processor module.
Detects when the gear selector lever is moved to the Neutral position.

The Park position switch:

Is hard-wired to the body processor module.
Detects when the gear selector lever is moved to the Park position.

The gear selector module:

Provides illumination of the gear selector surround, which is dimmable via a CAN signal from the instrument cluster.
Provides red illumination, on the gear selector surround, of the gear selected, by CAN signals from the instrument cluster.
Illuminates the security system Active LED on the gear selector surround, in response to an input from the body processor module.
Is connected to the fascia harness via a 12-way connector.

The gear selector interlock solenoid:

Prevents the gear selector lever from being moved from the Park position, unless the ignition switch is in position II, and the brake pedal is depressed.
Is controlled by an input from the body processor module.

The seven gear selector positions are:

P : The transmission is mechanically locked (starting available).
R : Reverse gear.
N : No power to the rear wheels (starting available).
D : All 5 forward gears available.
4 : Upshift to 4th gear only.
3 : Upshift to 3rd gear only.
2 : Upshift to 2nd gear only.