Mitsubishi Montero (2004+). Manual — part 484

GENERAL DESCRIPTION

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WHEEL AND TIRE

31-7

TPMS warning light bulb check signal <TPMS

warning light: illuminated>

• The TPMS receiver turns on the TPMS warning

light for 3 seconds when the ignition switch is
turned to the "ON" position. The driver can judge
disconnection of the TPMS warning light if it does
not come on.

• After the 3 seconds illumination, the TPMS

receiver turns off the TPMS warning light for 0.2
second, so that the mechanic can detect the fail-
ure of the illumination circuit through the TPMS
warning light ON in the tire pressure warning
state.

Tire pressure warning signal <TPMS warning

light: illuminated>

• When a received tire pressure sensor ID matches

the registered tire pressure sensor ID in the
TPMS receiver, and the received tire pressure
value is lower than the threshold value, then the
TPMS receiver considers it in the tire pressure
warning state and outputs the warning and sets
the diagnostic trouble code.

• Also while the vehicle is parked (ignition switch:

"LOCK" (OFF) position), the TPMS receiver mon-
itors tire pressure. And it outputs the warning
when the ignition switch is turned to the "ON"
position, if the tire pressure is in the warning
state.

• When the received tire pressure sensor ID

matches with the registered tire pressure sensor
ID in the TPMS receiver, and the tire pressure
value received is higher than the threshold value,
the TPMS receiver clears the tire pressure warn-
ing against the tire pressure sensor ID. If the tire
warning is cleared for all the tires including the
spare tire, the TPMS warning light will go out.

TIRE PRESSURE THRESHOLD VALUES

TPMS warning signal (EEPROM abnormality)

<TPMS warning light: flashes>

• The TPMS receiver checks EEPROM. When

information in the EEPROM is considered abnor-
mal due to tire pressure sensor ID deterioration,
etc., the TPMS receiver outputs the warning and
sets a diagnostic trouble code.

TPMS warning signal (reception failure) <TPMS

warning light: flashes>

• The TPMS receiver outputs the warning signal

and sets a diagnostic trouble code when the sig-
nals matched with the registered tire pressure
sensor IDs in the TPMS receiver were not
received.

• When the TPMS receiver receives normal signals

for the tire pressure sensor ID that had reception
failure problems, the TPMS receiver clears the
warning.

TPMS warning signal (TPMS transmitter battery

voltage abnormality) <TPMS warning light:
flashes>

• The TPMS receiver is considered to be in system

warning state due to TPMS transmitter low bat-
tery voltage against its tire pressure sensor ID.
The receiver outputs the warning signal and sets
a diagnostic trouble code under the following
conditions. The received tire pressure sensor ID
matches the registered tire pressure sensor ID in
the TPMS receiver, and function code ’Low Bat-
tery’ is received consecutively.

• The TPMS receiver clears the warning state

against its tire pressure sensor ID under the fol-
lowing conditions. The received tire pressure
sensor ID matches with the registered tire pres-
sure sensor ID in the TPMS receiver, and ’Normal
Pressure’ function code is received consecu-
tively.

TPMS warning signal (vehicle speed signal

abnormality) <TPMS warning light: flashes>

• When vehicle speed input is always less than 5

km/h (3 mph), the TPMS receiver judges the sys-
tem to be vehicle speed signal abnormality warn-
ing and outputs the warning and set a diagnostic
trouble code.

• The warning will be cleared when vehicle speed

signal is over 5 km/h (3 mph) for over 1 second
with the ignition switch in the "ON" position.

TPMS warning signal (Transmitter OFF mode)

<TPMS warning light: flashes>

• Transmitting signal of the TPMS transmitter

should be stopped during transportation to dealer
because it will break Japanese radio wave regu-
lation.

• OFF mode is canceled at dealer. So, output

warning and set DTC 17 (Transmitter OFF Mode,
ALL Tire) during transmitter OFF mode for
reminding cancel of OFF mode.

• When the TPMS receiver receives the signals

from all registered tire pressure sensor, the
TPMS receiver clears the warning.

ITEM

TIRE PRESSURE kPa
(psi)

Standard pressure at
cold (reference)

200 (29)

Alarm ON pressure

158 (23) or less

Alarm OFF pressure

174 (25) or more

TIRE PRESSURE MONITORING SYSTEM (TPMS) SERVICE PRECAUTIONS

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WHEEL AND TIRE

31-8

TPMS OPERATIONAL
CHARACTERISTICS

• The TPMS receiver monitors the tire pressure of

road tires except spare tire.

• The TPMS transmitter includes a roll switch that

senses tire rotation. The TPMS receiver can
determine which tires are rotating (road tire) and
stationary (spare tire).

• The recommended cold tire pressure at normal

condition for Montero is 200 kPa (29 psi). The
TPMS warning light will turn ON and DTC
23/27/32/36/41/ will be stored in memory when
the air pressure in any road tire is below 158 kPa
(23.0 psi).

• The TPMS warning light will turn OFF and the

DTC 23/27/32/36/41 in memory will be eliminated
when the tire pressure is increased to at least
174 kPa (25.25 psi).

• Customers may experience what appears to be

an "intermittent" tire pressure warning light
because the air pressure in the tires normally
fluctuates under various operating conditions:

• In cold weather, tire pressure will become

lower due to the ambient temperature, and
the TPMS warning light will turn ON if tire
pressure drops below 158 kPa (23.0 psi). The
tire pressure will increase after driving (tires
warm up), and the TPMS warning light will
turn OFF.

Regardless of the ambient temperature, set
the tire pressure to 200 kPa (29 psi) with the
tires cold [vehicle has been parked for at least
three hours or driven less than 1.6 kilometers
(one mile) after having been parked for three
hours].
NOTE: Tire pressure changes at slightly less
than 6.9 kPa (1 psi) per 5.5

°

C (10

°

F) of ambi-

ent temperature change.
For example, climates with seasonal temper-
atures that vary from 32

°C (90°F) in the sum-

mer to -12

°C (10°F) in the winter have a 44

degree Celsius (80 degrees Fahrenheit) tem-
perature change. This can result in an
approximate 55 kPa (8 psi) change in tire
pressure. In this example:

• If the tire pressure was set when the ambi-

ent temperature was 32

°C (90°F) in the

summer, it can be about 145 kPa (21 psi)
on the coldest day in the winter. This will
cause the TPMS warning light to turn on.

• If the tire pressure was set when the ambi-

ent temperature was -12

°C (10°F) in the

winter, it can be about 255 kPa (37 psi) on
the hottest day of the summer. This will
create a rougher ride.

The important point is that customers should have
their tire pressure seasonally adjusted.

TIRE PRESSURE MONITORING SYSTEM (TPMS) SERVICE

PRECAUTIONS

M1311004300022

• Transmitting signal of the TPMS transmitter

should be stopped during transportation to dealer
because it will break Japanese radio wave regu-
lation.

• OFF mode is canceled at dealer. So, output

warning and set DTC 17 during transmitter OFF
mode for reminding cancel of OFF mode.

• Do not use an aerosol puncture-repair spray.

Such a spray could damage the tire pressure
sensor (TPMS transmitter).

• Whenever the TPMS transmitters and/or TPMS

receiver are replaced with new ones, the tire
pressure sensor IDs must be registered into the
TPMS.

• Install the spare tire as shown. If the spare tire

valve (TPMS transmitter) is not positioned as
shown, the roll switch, which is incorporated in
the TPMS transmitter, may operate. In that case,
the system may determine the spare tire as a
road tire incorrectly.

• The use of non-genuine wheels may cause the

improper installation of the TPMS transmitters,

possibly resulting in air leakage and damage to
the TPMS transmitter.

AC307590 AB

VALVE

TIRE PRESSURE MONITORING SYSTEM (TPMS) SERVICE PRECAUTIONS

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WHEEL AND TIRE

31-9

• When the tire is removed from the wheel, a spe-

cial procedure must be observed to avoid the
TPMS transmitter damage. Refer to "TPMS
transmitter Removal and Installation (

P.31-97

)".

• The grommet at base of valve stem should be

replaced with a new one every five years or when
the tire is replaced. For the replacement proce-
dure, refer to "TPMS transmitter Removal and
Installation (

P.31-97

)".

• After the TPMS transmitter is replaced and the

tires are inflated, retighten the valve nut (TPMS
transmitter mounting nut) to the specified torque,
refer to "TPMS transmitter Removal and Installa-
tion (

P.31-97

)".

• Replace the TPMS transmitter when the TPMS

transmitter battery is discharged. The battery
cannot be removed from the TPMS transmitter.
Nominal service life of the battery is 10 years or
160,000 km (100,000 miles).

• If the valve core and valve cap are replaced, use

a genuine replacement part. The valve core is
similar to a conventional one, but nickel plating
was applied to avoid electric corrosion.

• TPMS may not work normally in the following cir-

cumstances:

• A wireless facility or device using the same

frequency with the TPMS transmitter is near
the vehicle.

• Snow or ice is stuck inside the wheel houses

and /or on the wheels.

• The TPMS transmitter’s battery is discharged.

• Wheels other than Mitsubishi genuine wheels

are being used.

• Wheels that are not fitted with TPMS transmit-

ters are being used.

• Wheels whose tire pressure sensor IDs are

not registered by the vehicle are being used.

NOTE: Tire inflation pressures vary with the ambient
temperature. If the vehicle is subjected to large varia-
tions in ambient temperature, the tire inflation pres-
sures may be under-inflated (causing the TPMS
warning light to come on) when the ambient temper-
ature is relatively low. If the TPMS warning light
comes on, adjust the tire inflation pressure.
NOTE: If any of the road wheel tires do not contain a
TPMS transmitter, and the customer continues driv-
ing, the TPMS warning light will flash.

WHEEL AND TIRE DIAGNOSIS

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WHEEL AND TIRE

31-10

WHEEL AND TIRE DIAGNOSIS

WHEEL AND TIRE DIAGNOSIS

M1311000700415

SYMPTOM

PROBABLE CAUSE

REMEDY

REFERENCE
PAGE

Rapid wear
at shoulders

Under-inflation
or lack of
rotation

Adjust the tire
pressure.

For tire inflation
pressure, refer to
the label on the
driver's side center
pillar.

Rapid wear
at center

Over-inflation
or lack of
rotation

Cracked
treads

Under-inflation

Adjust the tire
pressure.

For tire inflation
pressure, refer to
the label on the
driver's side center
pillar.

Wear on one
side

Excessive
camber

Check the camber.

Refer to GROUP
33A, On-vehicle
service

− Front

wheel alignment
check and
adjustment

P.33A-5

.

Feathered
edge

Incorrect toe-in

Adjust the toe-in.

Bald spots

Unbalanced
wheel

Balance the wheels.

−

ACX00923AB

ACX00924 AB

ACX00925AB

ACX00926AB

ACX00927AB

ACX00928 AB

ACX00929 AB

ACX00930AB

ACX00931AB

ACX00932AB

ACX00933 AB