Shifter A/T: Description and Operation

External Controls





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 cable.
^ Passes driver gearshift requests to the powertrain 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 powertrain control module.
The Neutral position switch:
^ Is incorporated within the transmission rotary switch.
The gear selector illumination module:
^ Provides a red gear lever position illumination to indicate the selected gear. . Provides a green background for the gear selector module.
The gear selector interlock solenoid:
^ Prevents the gear selector lever from being moved from the Park position, unless the ignition switch is in position 11, and the brake pedal is depressed.
^ Is controlled by an input from the brake pedal switch via a relay.
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.
The performance mode push-button:
^ Is mounted on the gear selector surround.
^ Selects Normal or Sport mode when pressed by the driver.
^ Is illuminated when Sport mode is selected.
^ Is hard-wired to the powertrain control module.
The gear selector at the transmission unit:
^ Is connected to the driver's selector module by a cable.
^ Operates the manual selector valve, which is part of the electro-hydraulic control unit.
^ Operates the rotary switch, which is connected to the powertrain control module.
Drive to 4th Switch:
The D to 4 micro switch is mounted in the 'J gate' assembly. When the selector is moved across the gate to engage 4, or back from that side towards D the selector cable does not move. In order that this change of state be registered by the powertrain control module the D to 4 switch is incorporated.