To Unlock The Doors

Press and release the UNLOCK button on the RKE transmitter once to unlock the driver’s door, or twice to unlock all doors. The turn signal lights will flash to acknowledge the unlock signal. The Illuminated Entry system (if equipped) will also turn on.

See also:

Onboard Diagnostic System — OBD II
Your vehicle is equipped with a sophisticated onboard diagnostic system called OBD II. This system monitors the performance of the emissions, engine, and automatic transmission control systems. ...

Six-Speed Automatic Transmission
The shift lever position display (located in the instrument panel cluster) indicates the transmission gear range. You must press the brake pedal to move the shift lever out of the PARK position ...

REVERSE
This range is for moving the vehicle backward. Shift into REVERSE only after the vehicle has come to a complete stop. ...