ignition JEEP GRAND CHEROKEE 2012 WK2 / 4.G Owners Manual

Under normal operating conditions, the catalytic con-
verter will not require maintenance. However, it is im-
portant to keep the engine properly tuned to assure
proper catalyst operation and prevent possible catalyst
damage.
NOTE:Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
In unusual situations involving grossly malfunctioning
engine operation, a scorching odor may suggest severe
and abnormal catalyst overheating. If this occurs, stop
the vehicle, turn off the engine and allow it to cool.
Service, including a tune-up to manufacturer’s specifica-
tions, should be obtained immediately. To minimize the possibility of catalytic converter dam-
age:
•Do not shut off the engine or interrupt the ignition,
when the transmission is in gear and the vehicle is in
motion.
•Do not try to start the engine by pushing or towing the
vehicle.
•Do not idle the engine with any spark plug wires
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough
idle or malfunctioning operating conditions.
7
MAINTAINING YOUR VEHICLE 591

Cavity CartridgeFuseMini
Fuse Description
J03 30 Amp Pink Trailer Tow
J04 25 Amp Natural Driver Door Node
J05 25 Amp Natural Passenger Door
Node
J06 40 Amp Green Antilock Brakes
Pump/Stability
Control System
J07 30 Amp Pink Antilock Brakes
Valve/Stability
Control System
J08 40 Amp Green Power Seat
J09 30 Amp Pink E-BrakeCavity Cartridge
FuseMini
Fuse Description
J10 30 Amp Pink Headlamp Wash
Relay Contact
J11 30 Amp Pink Drive Train Control
Module
J12 30 Amp Pink Rear Defroster
J13 60 Amp Yellow Main Ignition Off
Draw (IOD)
J14 20 Amp Blue Trailer Tow
Lamps/Park Lamps
J15 40 Amp Green Front Cabin Fan/
Blower
J17 40 Amp Green Starter Motor
Solenoid
7
MAINTAINING YOUR VEHICLE 611

Cavity CartridgeFuseMini
Fuse Description
M21 20 Amp
Yellow Automatic
Shutdown 3
M22 10 Amp
Red Horns (Low/High)
– Right
M23 10 Amp
Red Horns (Low/High)
– Left
M24 25 Amp
Natural Rear Wiper
M25 20 Amp
Yellow Fuel Pump Motor
Output/Diesel Lift
Pump (Export
Only)
M26 10 Amp
Red Driver Door Switch
BankCavity Cartridge
FuseMini
Fuse Description
M27 10 Amp
Red Ignition Switch/
Wireless Control
Module/Keyless
Entry Module
M28 15 Amp
Blue Powertrain
Controller/
Transmission
Controller
M29 10 Amp
Red Tire Pressure Moni-
tor – If Equipped
M30 15 Amp
Blue J1962 Diag
Connector
M31 20 Amp
Yellow Backup Lamps
M32 10 Amp
Red Occupant Restraint
Controller
614 MAINTAINING YOUR VEHICLE

CAUTION! (Continued)
•When replacing a blown fuse, it is important to
use only a fuse having the correct amperage rating.
The use of a fuse with a rating other than indicated
may result in a dangerous electrical system over-
load. If a properly rated fuse continues to blow, it
indicates a problem in the circuit that must be
corrected.
VEHICLE STORAGE
If you are leaving your vehicle dormant for more than
21 days you may want to take steps to protect your
battery. You may:
•Remove fuse #J13 in the Totally Integrated Power
Module (TIPM) labeled Ignition-Off Draw (IOD#1).
•Or, disconnect the negative cable from the battery.
•Anytime you store your vehicle, or keep it out of
service (i.e. vacation) for two weeks or more, run the
air conditioning system at idle for about five minutes
in the fresh air and high blower setting. This will
ensure adequate system lubrication to minimize the
possibility of compressor damage when the system is
started again.
REPLACEMENT BULBS
Interior LightsBulb Type
Glove Box Lamp ......................... 194
Grab Handle Lamp ................ L002825W5W
Overhead Console Reading Lamps .........VT4976
Rear Cargo Lamp ....................... 214–2
Visor Vanity Lamp ..................... V26377
Underpanel Courtesy Lamps ................ 906
Instrument Cluster (General Illumination) ....... 103
Telltale/Hazard Lamp ...................... 74
616 MAINTAINING YOUR VEHICLE

Gasoline, Clean Air...................... 510
Gasoline, Reformulated ................... 510
Gauges Coolant Temperature .................. 294
Fuel .............................. 293
Speedometer ........................ 292
Tachometer ......................... 285
Gear Ranges ........................ 422,430
Gear Select Lever Override ................. 565
General Information ............20,29,151,222,508
Glass Cleaning .......................... 609
Gross Axle Weight Rating ...............521,524
Gross Vehicle Weight Rating .............521,523
GVWR ............................... 521
Hands-Free Phone (Uconnect™) ............. 121
Hazard Warning Flasher ................... 548
Headlights ............................ 617
Bulb Replacement .................... 618 Cleaning
........................... 608
On With Wipers ..................... 181
Replacing .......................... 618
Heated Mirrors ......................... 111
Heater ............................... 394
Heater, Engine Block ..................... 418
High Beam Indicator ..................... 287
Hill Descent Control ..................... 474
Hill Descent Control Indicator ............... 287
Hill Start Assist ......................... 471
Hitches Trailer Towing ....................... 528
Holder, Cup ........................... 264
HomeLink® (Garage Door Opener) Transmitter . . 242
Hood Release .......................... 178
Ignition ............................... 16
Key ............................. 14,16
Ignition Key Removal ..................... 16
10
INDEX 663