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.