Specifications

STARTING AND OPERATING 263
Brake/Transmission Shift Interlock System
This vehicle is equipped with a Brake Transmission Shift
Interlock system (BTSI) that holds the transmission gear
selector in PARK unless the brakes are applied. To shift the
transmission out of PARK, the ignition must be in the RUN
mode (engine running or not) and the brake pedal must be
pressed.
The brake pedal must also be pressed before pushing the
button on the gear selector to shift from NEUTRAL into
DRIVE or REVERSE when the vehicle is stopped or moving
at low speeds.
FOUR WHEEL DRIVE
Jeep Active Drive (4WD) And Jeep Active Drive Low
(4WD Low)
Your vehicle may be equipped with a Power Transfer Unit
(PTU). This system is automatic with no driver inputs or
additional driving skills required. Under normal driving
conditions, the front wheels provide most of the traction. If
the front wheels begin to lose traction, power is shifted auto-
matically to the rear wheels. The greater the front wheel trac-
tion loss, the greater the power transfer to the rear wheels.
Additionally, on dry pavement under heavy throttle input
(where one may have no wheel spin), torque will be sent to
the rear in a preemptive effort to improve vehicle launch and
performance characteristics.
Four Wheel Drive (4x4)
The four wheel drive (4WD) is fully automatic in normal
driving mode.
NOTE:
It is not possible to carry out the change of mode when the
vehicle exceeds the speed of 75 mph (120 km/h).
Enabling Four Wheel Drive (4x4)
The buttons for the activation of four wheel drive are located
on the device Selec-Terrain and allow you to select the
following:
• 4WD LOCK
• 4WD LOW — (Trailhawk models only)
CAUTION!
All wheels must have the same size and type tires.
Unequal tire sizes must not be used. Unequal tire size
may cause failure of the power transfer unit.
5
20_BV_OM_EN_US_t.book Page 263