Jeep 2015 Grand Cherokee SRT - User Guide - Manual (Page 188)

• The DEF gauge may also not immediately update after a refill if the temperature of the
DEF fluid is below 12F (-11C). The DEF line heater will possibly warm up the DEF fluid
and allow the gauge to update after a period of run time. Under very cold conditions, it
is possible that the gauge may not reflect the new fill level for several drives.
NOTE:
• Driving conditions (altitude, vehicle
speed, load, etc.) will effect the amount
of DEF that is used in your vehicle.
• Since DEF will begin to freeze at 12°F
(-11°C), your vehicle is equipped with
an automatic DEF heating system.
This allows the DEF injection system to
operate properly at temperatures be-
low 12°F (-11°C).
Diesel Exhaust Fluid (DEF) Warning Messages
Your vehicle will begin displaying warning messages when the DEF level reaches a
driving range of approximately 500 miles (800 km).
If the following warning message sequence is ignored, your vehicle may not restart
unless DEF is added within the displayed mileage shown in the DID message.
Engine Will Not Restart in XXXX mi DEF Low Refill Soon – This message will display when
DEF driving range is less than 500 miles, DEF fluid top off is required with in the
displayed mileage. The message will be displayed in the DID during vehicle start up
with the current allowed mileage and accompanied by a single chime. The remaining
mileage can be pulled up anytime by way of the “Messages” list within the DID.
Engine Will Not Restart in XXXX mi Refill DEF – This message will display when DEF
driving range is less than 200 miles. It is also displayed at 150 miles and 100 miles.
DEF fluid top off is required with in the displayed mileage. The message will be
displayed in the DID during vehicle start up with an updated distance mileage, and
it will be accompanied by a single chime. Stating at 100 miles, remaining range will
be continuously displayed while operating the vehicle. Chimes will also accompany
the 75, 50 and 25 mile remaining distances. The DEF Low telltale will be on
continuously until DEF fluid is topped off.
Engine Will Not Restart Refill DEF – This message will display when the DEF driving
range is less than 1 mile, DEF fluid top off is required or the engine will not restart.
The message will be displayed in the DID during vehicle start up, and it will be
accompanied by a single chime. The DEF Low telltale will be illuminated continu-
ously until DEF fluid tank is filled with a minimum of two gallons of DEF.
1 — Diesel Fuel Filler
2 — Diesel Exhaust Fluid Filler
DIESEL
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