2012 JEEP GRAND CHEROKEE ignition

will sound. If the ignition switch is cycled, this
sequence will repeat, providing the system
fault still exists. The “Tire Pressure Monitoring
Telltale Light” will turn off when the fault condi-
tion no longer exists. A system fault can occur
by any of the following:
1. Jamming due to electronic devices or driv-
ing next to facilities emitting the same Radio
Frequencies as the TPM sensors.
2. Installing some form of aftermarket window
tinting that affects radio wave signals.
3. Lots of snow or ice around the wheels or
wheel housings.
4. Using tire chains on the vehicle.
5. Using wheels/tires not equipped with TPM
sensors.
NOTE:
There is no tire pressure monitoring sensor
in the spare tire. The TPMS will not be able to
monitor the tire pressure. If you install the
spare tire, in place of a road tire, that has a
pressure below the low-pressure warning
limit, upon the next ignition switch cycle, a
chime will sound, a “TIRE LOW PRESSURE”message will be displayed in the instrument
cluster, and the “Tire Pressure Monitoring
Telltale Light” will turn ON. After driving the
vehicle for up to 20 minutes above 15 mph
(25 km/h), the “Tire Pressure Monitoring
Telltale Light” will flash on and off for
75 seconds and then remain on solid. In
addition, a “SERVICE TPM SYSTEM” mes-
sage will be displayed. For each subsequent
ignition switch cycle, a chime will sound, a
“SERVICE TPM SYSTEM” message will be
displayed, and the “Tire Pressure Monitor-
ing Telltale Light” will flash on and off for
75 seconds and then remain on solid. Once
you repair or replace the original road tire,
and reinstall it on the vehicle in place of the
spare tire, the TPMS will update automati-
cally and the “Tire Pressure Monitoring Tell-
tale Light” will turn OFF, as long as no tire
pressure is below the low-pressure warning
limit in any of the four active road tires. The
vehicle may need to be driven for up to
20 minutes above 15 mph (24 km/h) in order
for the TPMS to receive this information.Premium System – If EquippedThe Tire Pressure Monitor System (TPMS) uses
wireless technology with wheel rim-mounted
electronic sensors to monitor tire pressure lev-
els. Sensors, mounted to each wheel as part of
the valve stem, transmit tire pressure readings
to the Receiver Module.
NOTE:
It is particularly important, for you to regu-
larly check the tire pressure in all of your
tires and to maintain the proper pressure.
The Tire Pressure Monitor System (TPMS) con-
sists of the following components:
•
Receiver Module
• Four Tire Pressure Monitoring Sensors
• Tire Pressure Monitoring Telltale Light
• Various Tire Pressure Monitoring System
Messages, which display in the Electronic
Vehicle Information Center (EVIC), and a
graphic displaying tire pressures
259

Tire Pressure Monitoring Low Pressure
Warnings
When one or more of the four active road tire
pressures are low, the “TPM Telltale Light” will
illuminate, an audible chime will sound, the
EVIC will display “Low Tire Pressure” message
for a minimum of five seconds, and a graphic
display of the pressure value(s) with the low
tire(s) “flashing.” Refer to “Electronic Vehicle
Information Center (EVIC)” in “Understanding
Your Instrument Panel” for further information.
NOTE:
Your system can be set to display pressure
units in PSI, kPa, or BAR.Should a low tire condition occur on any of the
four active road tire(s), you should stop as soon
as possible, and inflate the low tire(s) that is
“flashing” on the graphic display to the vehi-
cle’s recommended cold tire pressure. The
system will automatically update, the graphic
display of the pressure value(s) will stop “flash-
ing,” and the Low Pressure text message(s) will
switch off once the updated tire pressure(s)
have been received. The vehicle may need to
be driven for up to 20 minutes above 15 mph
(24 km/h) to receive this information.
SERVICE TPM SYSTEM Warning
When a system fault is detected, the “TPM
Telltale Light” will flash on and off for 75 sec-
onds then remain on solid, and a chime will
sound. The EVIC will display a “SERVICE TPM
SYSTEM” message. This message is then fol-
lowed by a graphic display, with “- -“ in place of
the pressure value(s), indicating which Tire
Pressure Monitoring Sensor(s) is not being re-
ceived.
NOTE:
Your system can be set to display pressure
units in PSI, kPa, or BAR.If the ignition switch is cycled, this sequence
will repeat, providing the system fault still ex-
ists. If the system fault no longer exists, the
“TPM Telltale Light” will no longer be illumi-
nated, the “SERVICE TPM SYSTEM
message
will not be present, and a pressure value will be
displayed instead of dashes. A system fault
can occur by any of the following:
1. Jamming due to electronic devices or driv-
ing next to facilities emitting the same Radio
Frequencies as the TPM sensors.
2. Installing some form of aftermarket window
tinting that affects radio wave signals.
260

3. Lots of snow or ice around the wheels or
wheel housings.
4. Using tire chains on the vehicle.
5. Using wheels/tires not equipped with TPM
sensors.
The “TPM Telltale Light” will also flash on and
off for 75 seconds and then remain on, and the
EVIC will display aSERVICE TPM SYSTEM
message when a system fault is detected pos-
sibly related to an incorrect sensor location
fault. In this case, the SERVICE TPM SYSTEM
message is then followed by a graphic display,
with pressure values still shown. This indicates
the pressure values are still being received
from the TPM Sensors. However, the system
still needs to be serviced as long as the SER-
VICE TPM SYSTEM message exists.
NOTE:
There is no tire pressure monitoring sensor
in the spare tire. The TPMS will not be able to
monitor the tire pressure. If you install the
spare tire in place of a road tire that has a
pressure below the low-pressure warning
limit, upon the next ignition switch cycle, a
chime will sound, the TPM Telltale Light will turn on, and the EVIC will still display a
Low Pressure message and a “flashing”
pressure value in the graphic display. After
driving the vehicle for up to 20 minutes
above 15 mph (24 km/h), the
TPM Telltale
Light will flash on and off for 75 seconds
and then remain on, the EVIC will display a
“SERVICE TPM SYSTEM message and then
display dashes (- -) in place of the pressure
value. For each subsequent ignition switch
cycle, a chime will sound, the TPM Telltale
Light will flash on and off for 75 seconds
and then remain on, the EVIC will display a
SERVICE TPM SYSTEM message and then
display dashes (- -) in place of the pressure
value. Once you repair or replace the origi-
nal road tire, and reinstall it on the vehicle in
place of the spare tire, the TPMS will update
automatically.
In addition, the graphic in the EVIC will display
a new pressure value instead of dashes (- -), as
long as no tire pressure is below the low-
pressure warning limit in any of the four active
road tires. The vehicle may need to be driven
for up to 20 minutes above 15 mph (24 km/h) in
order for the TPMS to receive this information.TPMS DeactivationThe TPMS can be deactivated if replacing all
four wheel and tire assemblies (road tires) with
wheel and tire assemblies that do not have
TPMS Sensors, such as when installing winter
wheel and tire assemblies on your vehicle To
deactivate the TPMS, first, replace all four
wheel and tire assemblies (road tires) with tires
not equipped with Tire Pressure Monitoring
(TPM) Sensors. Then, drive the vehicle for
20 minutes above 24 km/h (15 mph). The TPMS
will chime, the TPM Telltale Light will flash on
and off for 75 seconds and then remain on and
the Electronic Vehicle Information Center
(EVIC) will display the “SERVICE TPM SYSTEM”
message and then display dashes (--) in place
of the pressure values. Beginning with the next
ignition switch cycle, the TPMS will no longer
chime or display the “SERVICE TPM SYSTEM”
message in the EVIC but dashes (--) will remain
in place of the pressure values.
To reactivate the TPMS, replace all four wheel
and tire assemblies (road tires) with tires
equipped with TPM sensors. Then, drive the
vehicle for up to 20 minutes above 24 km/h
(15 mph). The TPMS will chime, the TPM
261

Telltale Lightwill flash on and off for 75 sec-
onds and then turn off, and the Electronic
Vehicle Information Center (EVIC) will display
the “SERVICE TPM SYSTEM” message. The
EVIC will also display pressure values in place
of the dashes. On the next ignition switch cycle
the SERVICE TPM SYSTEM message will no
longer be displayed as long as no system fault
exists.
General InformationTransmitter and receivers operate on a carrier
frequency of 433.92 MHz as required by EEC
regulations. These devices must be certified to
conform to specific regulations in each indi-
vidual country. Two sets of regulations are
involved: ETS (European Telecommunication
Standard) 300–220, which most countries use,
and German BZT federal regulation 225Z125,
which is based on ETC 300–220 but has addi-
tional unique requirements. Other defined re-
quirements are noted in ANNEX VI of COMMIS-
SION DIRECTIVE 95/56/EC. Operation is
subject to the following conditions:
• This device may not cause harmful interfer-
ence. •
This device must accept any interference
received, including interference that may
cause undesired operation.
FUEL REQUIREMENTS —
GASOLINE ENGINE
3.6L Engine
These engines are designed to meet all emis-
sions regulations and provide excellent fuel
economy and performance when using high-
quality unleaded gasoline with a minimum re-
search octane rating of 91. The use of premium
gasoline is not recommended, as it will not
provide any benefit over regular gasoline in
these engines.
5.7L EngineTheses engines are designed to meet all emis-
sions regulations and provide satisfactory fuel
economy and performance when using high-
quality unleaded gasoline having an octane
range of 91 to 95. The manufacturer recom-
mends the use of 95 octane for optimum per-
formance. The use of premium gasoline is not
recommended, as it will not provide any benefit
over regular gasoline in these engines. Light spark knock at low engine speeds is not
harmful to your engine. However, continued
heavy spark knock at high speeds can cause
damage, and immediate service is required.
Poor quality gasoline can cause problems such
as hard starting, stalling, and hesitations. If you
experience these symptoms, try another brand
of gasoline before considering service for the
vehicle.
Over 40 auto manufacturers worldwide have
issued and endorsed consistent gasoline
specifications (the Worldwide Fuel Charter,
WWFC) which define fuel properties necessary
to deliver enhanced emissions, performance,
and durability for your vehicle. The manufac-
turer recommends the use of gasoline that
meets the WWFC specifications if they are
available.
Besides using unleaded gasoline with the
proper octane rating, gasolines that contain
detergents, corrosion and stability additives
are recommended. Using gasolines that have
these additives may help improve fuel
economy, reduce emissions, and maintain ve-
hicle performance.
262

Pin
Number Function Wire
Color
1 Left Turn Signal Black/ White
2 Rear Fog Light White
3
aGround/Common
Return for Contacts
(Pins) 1 and 2 and 4 to 8 Brown
4 Right Turn Signal Black/ Green
Pin
Number Function Wire
Color
5 Right Rear Position, Side Marker Lights,and Rear Registra- tion Plate Illumina- tion Device.
b
Green/Red
6 Stop Lights Black/Red
7 Left Rear Position, Side Marker Lights,and Rear Registra- tion Plate Illumina- tion Device.
b
Green/Black
8 Reverse lights Blue/Red
9 Permanent Power Supply (+12V) Red
10 Power Supply Con- trolled by IgnitionSwitch (+12V) Yellow
11
aReturn for Contact (Pin) 10 Yellow/
Brown
Pin
Number Function Wire
Color
12 Reserve for Future Allocation –
13
aReturn for Contact (Pin) 9 Red/
Brown
Note: The allocation pin 12 has been
changed from “Coding for coupled Trailer” to
“Reserve for Future Allocation.”
aThe three return circuits shall not be con-
nected electrically in the trailer.
bThe rear position registration plate illumina-
tion device shall be connected such that no
light of the device has a common connection
with both pins 5 and 7.
13 - Pin Connector
273

1. Bring the vehicle to a complete stop and
shift the transmission to PARK.
2. Turn the engine OFF.
3. For vehicles with Keyless Enter-N-Go, re-
move the Keyless Enter-N-Go button and use
the key fob to complete this procedure. Refer to
“Starting Procedures/Keyless Enter-N-Go” in
“Starting and Operating” for further information.
4. Turn the ignition switch to the ON/RUN po-
sition, but do not start the engine.
5. Press and hold the brake pedal.
6. Shift the transmission into NEUTRAL.
7. Using the point of a ballpoint pen or similar
object, press and hold the recessed transfer
case NEUTRAL (N) button (located by the
selector switch) for four seconds, until the light
behind the N symbol starts to blink, indicating
shift in progress. The light will stop blinking
(stay on solid) when the shift to NEUTRAL (N) is
complete.8. After the shift is completed and the NEU-
TRAL (N) light stays on, release the NEUTRAL
(N) button.
9. Start the engine.
10. Shift the transmission into REVERSE.
11. Release the brake pedal for five seconds
and ensure that there is no vehicle movement.
12. Turn the engine OFF, then turn the ignition
switch back to the ON/RUN position without
starting the engine.
13. Firmly apply the parking brake.14. Shift the transmission into PARK.
CAUTION!
Damage to the transmission may occur if the
transmission is shifted into PARK with the
transfer case in NEUTRAL (N) and the engine
running. With the transfer case in NEUTRAL
(N) ensure that the engine is off prior to
shifting the transmission into PARK.
15. Attach the vehicle to the tow vehicle using
a suitable tow bar.
16. Release the parking brake.
17. Disconnect the negative battery cable, and
secure it away from the negative battery post.
NOTE:
• Steps 1 through 6 are requirements that
must be met prior to pressing the NEU-
TRAL (N) button, and must continue to be
met until the four seconds elapse and the
shift has been completed. If any of these
requirements are not met prior to press-
ing the NEUTRAL (N) button or are no
longer met during the four second timer,
NEUTRAL (N) Switch
278

then the NEUTRAL (N) indicator light will
flash continuously until all requirements
are met or until the NEUTRAL (N) button is
released.
• The ignition switch must be in the ON/
RUN position for a shift to take place and
for the position indicator lights to be op-
erable. If the ignition switch is not in the
ON/RUN position, the shift will not take
place and no position indicator lights will
be on or flashing.
• A flashing NEUTRAL (N) position indica-
tor light indicates that shift requirements
have not been met.
Shifting Out Of NEUTRAL (N)
Use the following procedure to prepare your
vehicle for normal usage.
1. Bring the vehicle to a complete stop, leaving
it connected to the tow vehicle.
2. Firmly apply the parking brake.
3. Reconnect the negative battery cable. 4. Turn the ignition switch to the LOCK/OFF
position.
5. Turn the ignition switch to the ON/RUN po-
sition, but do not start the engine.
6. Press and hold the brake pedal.
7. Shift the transmission into NEUTRAL.
8. Using the point of a ballpoint pen or similar
object, press and hold the recessed transfer
case NEUTRAL (N) button (located by the
selector switch) for one second.
NOTE:
When shifting out of transfer case NEUTRAL
(N), turning the engine OFF may be required
to avoid gear clash.
9. After the NEUTRAL (N) indicator light turns
off, release the NEUTRAL (N) button.
10. After the NEUTRAL (N) button has been
released, the transfer case will shift to the
position indicated by the selector switch.
11. Shift the transmission into PARK.
12. Release the brake pedal.
13. Disconnect vehicle from the tow vehicle.
14. Start the engine.
NEUTRAL (N) Switch
279

15. Press and hold the brake pedal.
16. Release the parking brake.
17. Shift the transmission into DRIVE, release
the brake pedal, and check that the vehicle
operates normally.
18. The Keyless Enter-N-Go button (if
equipped) may now be reinstalled if desired.
Refer to “Starting Procedures/Keyless Enter-N-
Go” in “Starting and Operating” for further
information.NOTE:
•
Steps 1 through 7 are requirements that
must be met prior to pressing the NEU-
TRAL (N) button, and must continue to be
met until the shift has been completed. If
any of these requirements are not met
prior to pressing the NEUTRAL (N) button
or are no longer met during the shift, the
NEUTRAL (N) indicator light will flash
continuously until all requirements are
met or until the NEUTRAL (N) button is
released. •
The ignition switch must be in the ON/
RUN position for a shift to take place and
for the position indicator lights to be op-
erable. If the ignition switch is not in the
ON/RUN position, the shift will not take
place and no position indicator lights will
be on or flashing.
• A flashing NEUTRAL (N) position indica-
tor light indicates that shift requirements
have not been met.
280