Quote:
Originally Posted by mxdad
Must be a new thing...my 17 has a full and auto mode. From what I'm reading, it seems that Auto is tied to cruise control, and full is based on being in tow/haul mode. I'll re-read the manual later this evening.
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Right Out of the 2017 Owner's Manual
Tow Haul mode:
E161509
To activate tow/haul, press the
button on the gearshift lever
once. The TOW HAUL indicator
light illuminates in the instrument cluster.
The tow/haul feature:
Delays upshifts to reduce the frequency
of transmission shifting.
Provides engine braking in all forward
gears, which slows your vehicle and
assists you in controlling your vehicle
when descending a grade.
Depending on driving conditions and
load conditions, may downshift the
transmission, slow your vehicle and
control your vehicle speed when
descending a hill, without pressing the
accelerator pedal. The amount of
downshift braking provided will vary
based upon the amount you press the
brake pedal.
The tow/haul feature improves
transmission operation when towing a
trailer or a heavy load. All transmission
gear ranges are available when using
tow/haul.
Note: If your vehicle is equipped with the
Adaptive Steering System, enabling the
tow/haul feature will adjust the steering
response. In tow/haul mode the Adaptive
Steering system reduces vehicle sensitivity
to steering inputs at higher vehicle speeds
while maintaining the ease of parking and
maneuverability at low speeds. See
Steering (page 255).
To deactivate the tow/haul feature and
return to normal driving mode, press the
button on the gearshift lever when
tow/haul is active. The TOW HAUL light
deactivates. Tow/haul also deactivates when you power down your vehicle.
Engine Brake
There are two engine brake modes, manual
and automatic.
Manual Engine Braking
1. Press the button to switch on manual
engine braking.
2. Release the accelerator pedal to
maximize engine braking.
3. Apply the brakes. The transmission
downshifts to lower gears.
Note: The engine braking feature only
functions when you release the accelerator.
Note: You can shift the transmission to
lower gears with progressive range selection
(PRS) or manual shifting independent of
pressing the brakes.
Note: You can also use manual engine
braking with cruise control to improve grade
descent control.
Note: If your vehicle has Adaptive Cruise
Control, the speed control system uses the
selected engine brake mode, transmission
gears, and brakes to maintain the set speed
and distance to the vehicle being followed.
Automatic Engine Braking
1. Press the button twice to switch on
automatic engine braking.
2. Release the accelerator or brake pedal.
The system remembers your vehicle
speed.
Note: This feature offers smoother, less
aggressive engine braking during downhill
descents. It may not apply braking if the
vehicle speed is not increasing, although it
will apply full engine braking force when
needed to prevent acceleration. The system
automatically activates the engine brake
and, if necessary, downshifts the
transmission to lower gears to not exceed
your vehicle's set speed when the brake or
accelerator were last released.
Warning Lamp Conditions
Illuminates when this feature is
switched on and the system is
operating properly. See Warning
Lamps and Indicators (page 105).
Flashes when the engine brake is
disabled due to a fault or the engine
does not meet the required braking
conditions.
Does not illuminate when the switch
or indicator is faulty.
You can switch the system on at anytime.
The system becomes active once the
braking conditions are met.
Braking Conditions
Your vehicle is in a forward gear.
The engine speed is above about 1500
RPM.
Your foot is off the accelerator.
You can use this feature with tow/haul or
progressive range selection to provide
further increased engine braking. The
transmission automatically upshifts to
prevent the engine from entering the red
zone on the tachometer. See Automatic
Transmission (page 205).
Linear Mode
