2007 JEEP GRAND CHEROKEE fuel pump

manufacturer. While MTBE is an oxygenate made from
Methanol, it does not have the negative effects of Metha-
nol.
MMT In Gasoline
MMT is a manganese containing metallic additive that is
blended into some gasoline to increase the octane num-
ber. Gasolines blended with MMT offer no performance
advantage beyond gasolines of the same octane number
without MMT. Gasolines blended with MMT have shown
to reduce spark plug life and reduce emission system
performance in some vehicles. The manufacturer recom-
mends using gasolines without MMT. Since the MMT
content of gasoline may not be indicated on the pump,
you should ask your gasoline retailer whether or not
his/her gasoline contains MMT.It is even more important to look for gasolines without
MMT in Canada, because MMT can be used at levels
higher than those allowed in the United States.
MMT is prohibited in Federal and California reformu-
lated gasolines.
Materials Added to Fuel
All gasoline sold in the United States is required to
contain effective detergent additives. Use of additional
detergents or other additives are not needed under
normal conditions and would result in additional cost.
Therefore you should not have to add anything to the
fuel.
272 STARTING AND OPERATING

NOTE:Tighten the gas cap about 1/4 turn until you
hear one click. This is an indication that cap is properly
tightened.
If the gas cap is not tighten properly, the Malfunction
Indicator Light will come on. Be sure the gas cap is
tightened every time the vehicle is refueled.
WARNING!
A fire may result if gasoline is pumped into a
portable container that is inside of a vehicle. You
could be burned. Always place gas containers on the
ground while filling.
Loose Fuel Filler Cap Message
If the vehicle diagnostic system determines that the fuel
filler cap is loose, improperly installed, or damaged, a
ªCHECK GASCAPº message will be displayed in theEVIC (Electronic Vehicle Information Center). Refer to
ªElectronic Vehicle Information Centerº in Section 4 of
this manual. Tighten the fuel filler cap until a ªclickingº
sound is heard. This is an indication that the fuel filler
cap is properly tightened. Refer to ªOnboard Diagnostic
System Ð OBDIIº in Section 7 of this manual for more
information.
CAUTION!
Damage to the fuel system or emission control
system could result from using an improper fuel
tank filler cap (gas cap). A poorly fitting cap could let
impurities into the fuel system.
276 STARTING AND OPERATING

Cav-
ityCartridge
FuseMini Fuse Description
11 30 Amp
PinkCig Ltr/T-Tow
12 40 Amp
GreenRear Window Defog-
ger (EBL)/Htd Mirror
13 40 Amp
GreenJunction Block (JB)
Power
14 Spare
15 Spare
16 25 Amp
NaturalIntegrated Power
Module (IPM)/Coils
17 Spare
18 20 Amp
YellowEATX/AC Clutch
19 20 Amp
YellowIgn SwCav-
ityCartridge
FuseMini Fuse Description
20 20 Amp
YellowPCM Batt (Gasoline
Only)
21 30 Amp
GreenABS Valves
22 20 Amp
YellowT-Tow (BUX)
23 20 Amp
YellowFinal Drive Control
Module (FDCM)
24 20 Amp
YellowFuel Pump
25 20 Amp
YellowFinal Drive Control
Module (FDCM)
26 Spare
27 15 Amp
BlueBrake/Stop Lamps
28 Spare
MAINTAINING YOUR VEHICLE 337
7