Jeep Grand Cherokee SRT 2018, Owner'S Manual

Page: 197 / 666

Pin Number Function Wire Color
12 Reserve for Future Allocation –
13
a
Return for Contact (Pin) 9 Red/Brown
NOTE:
The allocation pin 12 has been changed from “Coding for coupled Trailer” to “Reserve for Future Allocation.”
a
The three return circuits shall not be connected electrically in the trailer.
b
The rear position registration plate illumination device shall be connected such that no light of the device has a common connection with both pins
5 and 7.
Towing Tips
Before setting out on a trip, practice turning,
stopping, and backing up the trailer in an area
located away from heavy traffic.
Automatic Transmission
Select the DRIVE range when towing. The
transmission controls include a drive strategy to
avoid frequent shifting when towing. However, if
frequent shifting does occur while in DRIVE,
select TOW mode, or use the AutoStick shift
control to manually select a lower gear.
NOTE:
Using TOW mode, or selecting a lower gear
(using the AutoStick shift control) while operat-
ing the vehicle under heavy loading conditions,
will improve performance and extend transmis-
sion life by reducing excessive shifting and heat
buildup. This action will also provide better
engine braking.
TOW Mode
To reduce the potential for automatic transmis-
sion overheating, select TOW mode when driv-
ing in hilly areas, or select a lower gear (using
the AutoStick shift paddles) on more severe
grades.
AutoStick
•
When using the AutoStick shift control, select
the highest gear that allows for adequate
performance and avoids frequent downshifts.
For example, choose “5” if the desired speed
can be maintained. Choose “4” or “3” if
needed to maintain the desired speed.
•
To prevent excess heat generation, avoid
continuous driving at high RPM. Reduce ve-
hicle speed as necessary to avoid extended
driving at high RPM. Return to a higher gear
or vehicle speed when grade and road con-
ditions allow.
Speed Control — If Equipped
•
Do not use on hilly terrain or with heavy loads.
•
When using the speed control, if you experi-
ence speed drops greater than 10 mph
(16 km/h), disengage until you can get back
to cruising speed.
•
Use speed control in flat terrain and with light
loads to maximize fuel efficiency.
Cooling System
To reduce potential for engine and transmission
overheating, take the following actions:
City Driving
•
In city traffic — while stopped, place the
transmission in NEUTRAL, but do not in-
crease engine idle speed.
Highway Driving
•
Reduce speed.
•
Temporarily turn off air conditioning.
194