Shifter A/T: Description and Operation

SHIFT SELECTION AND GEAR POSITION

Introduction
Driver gearshift control is effected by:
- The gear selector lever.
- The accelerator pedal position.
- The kickdown switch.
- The performance mode push-button.

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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 Controller Area Network (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:
- Park. The transmission is mechanically locked, which prevents the rear wheels from rotating.
- Reverse. Reverse gear is selected.
- Neutral. The engine is disconnected from the transmission.
- Drive. All five forward gears are selected automatically, according to conditions and driver demand.
- Fourth. The lowest four gears are selected automatically.
- Third. The lowest three gears are selected automatically.
- Second. The lowest two gears are selected automatically.