2005 JEEP GRAND CHEROKEE fuel pump

MMT In Gasoline
MMT is a manganese containing metallic additive that is
blended into some gasoline to increase octane. Gasoline
blended with MMT provides no performance advantage
beyond gasoline of the same octane number without
MMT. Gasoline blended with MMT reduces spark plug
life and reduces emission system performance in some
vehicles. The manufacturer recommends that gasoline
without MMT be used in your vehicle. The MMT content
of gasoline may not be indicated on the gasoline pump,
therefore, you should ask your gasoline retailer whether
or not his/her gasoline contains MMT.
It is even more important to look for gasoline without
MMT in Canada because MMT can be used at levels
higher than allowed in the United States. MMT is pro-
hibited in Federal and California reformulated gasoline.
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 is not needed under normal
conditions.
Fuel System Cautions
CAUTION!
Follow these guidelines to maintain your vehicle’s
performance:
•The use of leaded gas is prohibited by Federal law.
Using leaded gasoline can impair engine performance,
damage the emission control system.
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5

WARNING!
•Remove the fuel cap (gas cap) slowly to prevent
fuel spray from the filler neck which may cause
injury.
•The volatility of some gasoline may cause a
buildup of pressure in the fuel tank that may
increase while you drive. This pressure can result
in a spray of gasoline and/or vapors when the cap
is removed from a hot vehicle. Removing the cap
slowly allows the pressure to vent and prevents
fuel spray.
•Never have any smoking materials lit in or near
the vehicle when the fuel cap is removed or the
tank filled.
•Never add fuel to the vehicle when the engine is
running.
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.
TRAILER TOWING
In this section you will find information on limits to the
type of towing you can reasonably do with your vehicle.
And you will find safety tips. Before towing a trailer
carefully review this information to tow your load as
efficiently and safely as possible.
To maintain warranty coverage, follow the requirements
and recommendations in this manual concerning ve-
hicles used for trailer towing.
Perform maintenance services as prescribed in the appro-
priate “Maintenance Schedule.” Refer to Section 8 of this
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5

Cavity Fuse/Color Description
1 40 Amp Green HVAC Blower
2 30 Amp Pink Power Outlets
3 30 Amp Pink Rr Wiper/Ign R/O
4 30 Amp Pink ABS Pump
5 50 Amp Red Cabin Htr 1 (Diesel Only)
6 50 Amp Red ASD
7 30 Amp Pink Rr HVAC (XK)
8 40 Amp Green Acc Delay/Seats
9 Spare
10 40 Amp Green Starter/JB Power
11 30 Amp Pink Cig Ltr/T-Tow
12 40 Amp Green EBL/Htd Mirror
13 40 Amp Green JB Power
14 50 Amp Red Cabin Htr 2 (Diesel Only)
15 50 Amp Red Cabin Htr 3 (Diesel Only)
16 25 Amp Natural IPM/CoilsCavity Fuse/Color Description
17 Spare
18 20 Amp Yellow TCM/AC Clutch
19 20 Amp Yellow Ign Sw
20 20 Amp Yellow PCM Batt (Gasoline Only)
21 30 Amp Pink ABS Valves
22 Spare
23 20 Amp Yellow FDCM
24 20 Amp Yellow Fuel Pump
25 20 Amp Yellow FDCM/E-Diff.
26 15 Amp Blue Hyd/PCM (Diesel Only)
27 15 Amp Blue Brake/Stop Lamps
28 25 Amp Natural NGC/Injectors
29 Spare
30 Spare
31 Mini Relay Cabin Htr 1 Rly (Diesel
Only)
MAINTAINING YOUR VEHICLE 347
7

Cavity Fuse/Color Description
32 Micro Relay TCM Rly (Gasoline Only)
33 Micro Relay Starter Rly
34 Micro Relay AC Clutch Rly
35 Micro Relay Fuel Pump Rly
36 Mini Relay Cabin Htr 3 Rly (Diesel
Only)
38 Mini Relay Cabin Htr 2 Rly (Diesel
Only)
39 Mini Relay HVAC Blower Rly
40 Mini Relay ASD RlyUnderhood Fuses (Integrated Power Module)
Integrated Power Module
348 MAINTAINING YOUR VEHICLE