Mitsubishi Montero (2004+). Manual — part 483

GENERAL DESCRIPTION

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WHEEL AND TIRE

31-3

CIRCUIT DIAGRAM

• The TPMS receiver processes input signals from

each TPMS transmitter as well as vehicle speed
signals from the vehicle speed sensor. When the
road tire pressure is low, it sends a warning sig-
nal causing the TPMS warning light to be illumi-
nated. When the TPMS has problems, it sends a
warning signal causing the TPMS warning light to
be flashed.

• 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).

• For 3 seconds after the ignition switch is turned to

the "ON" position, the TPMS receiver illuminates
the TPMS warning light to check any breaks in
the TPMS warning light circuit.

AC307586

RELAY
BOX

JUNCTION
BLOCK

COMBINATION
METER

TPMS
RECEIVER

DATA LINK
CONNECTOR

FRONT TIRE (LH)

FRONT TIRE (RH)

REAR TIRE (LH)

REAR TIRE (RH)

IGNITION SWITCH (IG1)

FUSIBLE LINK

TPMS

POWER
SUPPLY

GND

RECEIVING CIRCUIT

EEPROM

VEHICLE
SPEED
SENSOR

CPU

TPMS TRANSMITTER

TPMS ANTENNA
(FRONT: LH)

CONTROL CIRCUIT

TPMS ANTENNA
(FRONT: RH)

CONTROL CIRCUIT

TPMS ANTENNA
(REAR: LH)

CONTROL CIRCUIT

CPU

TRANSMISSION

CIRCUIT

SPARE TIRE

18

15A

6

10A

10

20A

2

FUSIBLE LINK

1

AB

ANTENNA

TPMS ANTENNA
(REAR: RH)

CONTROL CIRCUIT

PRESSURE
SENSOR

ROLL
SWITCH

BATTERY

GENERAL DESCRIPTION

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WHEEL AND TIRE

31-4

• By connecting the scan tool to the data link con-

nector, data stored in the TPMS receiver (data of
tire pressure and tire pressure sensor ID, the
alarm status and warning history, etc.) can be dis-
played and the tire pressure sensor ID can be
registered.

TPMS WARNING LIGHT

The TPMS warning light on the combination meter illuminates
or flashes to alert the driver when signals are entered from the
TPMS receiver.

NOTE:

.

•

Immediately after the tire pressure sensor ID has been rec-
ognized, the TPMS receiver cannot recognize the road tires
until the vehicle is driven for some time. Therefore, if the
spare tire pressure is low, the TPMS warning light will illumi-
nate.

•

The tire pressure monitoring is not applicable for the spare
tire. Therefore, if the low-pressure road tire is used as a
spare tire, the TPMS warning light will go out as soon as the
TPMS receiver recognizes that.

CIRCUMSTANCE

WARNING LIGHT

For 3 seconds after the ignition switch
is turned to the "ON" position
(warning light circuit self-check)

Illuminates

TPMS problems

Flashes

Low tire pressure of any road tire

Illuminates

AC205999

H

C

AT

TEMP

SRS

P
R
N
D

5
4
3
2
1

x1000r/min

2

3

4

5

6

7

8

1

0

AC307585

GENERAL DESCRIPTION

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WHEEL AND TIRE

31-5

TPMS TRANSMITTER (TIRE PRESSURE SENSOR)

The TPMS transmitter combines the valve and tire
pressure sensor in a single unit. The TPMS transmit-
ters are mounted inside the tires (including the spare
tire). The TPMS transmitter measures tire pressure
directly with its tire pressure sensor and sends radio
frequency signals to the antenna inside the wheel
house. The TPMS transmitter includes a roll switch
that senses tire rotation. The TPMS receiver can
determine which tires are rotating (road tire) and sta-
tionary (spare tire).
NOTE: Use only genuine wheels. The use of
non-genuine wheels may cause the improper instal-
lation of the TPMS transmitters, possibly resulting in
air leakage and damage to the TPMS transmitter.

.

TIRE PRESSURE SAMPLING TIMING

Tire pressure sampling: Once every 30 sec-
onds

.

DATA TRANSMISSION TIMING

If a sampled pressure varies by

±10 kPa

(1.5psi) from the last transmitted pressure
value, an additional transmission will occur.

NOTE: Vehicle moving = vehicle speed: approxi-
mately 30 km/h (19 mph) or more <roll switch: ON>
NOTE: Service period = First 15 minutes after vehi-
cle stops <roll switch: OFF>
NOTE: Vehicle stationary = Situations except vehicle
moving and service period <roll switch: OFF>

AC307594

AC307583

AC307584

AB

VALVE

TPMS TRANSMITTER
(TIRE PRESSURE SENSOR)

A

SECTION A - A

A

TPMS
ANTENNA

TPMS
TRANSMITTER

VEHICLE STATUS

TRANSMISSION
TIMING

At vehicle moving and
service period

once every 1 minute

At vehicle stationary

once every 1 hour

GENERAL DESCRIPTION

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WHEEL AND TIRE

31-6

TPMS ANTENNAS

The TPMS for Montero has four TPMS antennas. Each TPMS
antenna is installed inside the wheel house. The TPMS
antenna receives radio frequency signal from the TPMS trans-
mitter and sends it to the TPMS receiver via feeder cable.

TPMS RECEIVER

1. The TPMS receiver is installed at the inner quarter panel

(RH), and monitors the tire pressure of road tires except
spare tire. The TPMS receiver receives a signal from a
TPMS transmitter every one minute if the TPMS transmitter
is revolving (i.e. it is embedded in road wheel tire).
NOTE: The TPMS receiver detects automatically that the
tire is "spare" tire (not on the road). Then the receiver
ignores the spare tire. The spare tire transmitter sends a
signal once every hour if it stationary (i.e. it is embedded in
spare tire).

2. When the ignition switch is at the "LOCK" (OFF) position,

The TPMS receiver should operate intermittently (supplies
power to receiving circuit intermittently).

3. The TPMS receiver has the following functions:

• SCAN TOOL (MUT-III) communication functions

• Warning function

.

SCAN TOOL (MUT-III) COMMUNICATION
FUNCTIONS
The following functions can be performed by con-
necting the scan tool to the data link connector and
starting the MUT-III.

• Diagnostic trouble code reading function

(for DTC chart, refer to

P.31-19

.)

• Service data reading function

(for service data list, refer to

P.31-84

.)

• Actuator testing function

(for test item, refer to

P.31-85

.)

• Tire pressure sensor ID registration function

<TPMS special function (for data list, refer to

P.31-85

).>

NOTE: If the TPMS transmitters or TPMS
receiver are replaced, the tire pressure sensor ID
for all tires must be registered in the TPMS
receiver.

• Tire pressure sensor check function <TPMS spe-

cial function (for data list, refer to

P.31-85

).>

The pressure sensor data can be displayed by
using a magnet to send the signal from each
TPMS transmitter.

• Tire pressure sensor ID check function <TPMS

special function (for data list, refer to

P.31-85

).>

Each tire pressure sensor ID currently registered
in the TPMS receiver is displayed.

.

WARNING FUNCTIONS
The TPMS receiver determines the need for a warn-
ing based on the input data from the TPMS antennas
and the vehicle speed sensor signal from the vehicle
speed sensor. When the TPMS receiver sends a
warning signal (a TPMS warning light bulb check sig-
nal, a tire pressure warning signal, or a TPMS warn-
ing signal), the TPMS warning light on the
combination meter is illuminated or flashed. Three
seconds after the ignition switch is turned to the "ON"
position, or if the problem is corrected, the TPMS
warning light goes off.

AC307347AB

TPMS ANTENNAS

AC307592 AB

TPMS
RECEIVER

THIRD SEAT
BELT (RH)