Mitsubishi Montero (2004+). Manual - part 497

TIRE PRESSURE MONITORING SYSTEM (TPMS) DIAGNOSIS

TSB Revision

WHEEL AND TIRE

31-59

INSPECTION PROCEDURE 3: The TPMS Warning Light does not Illuminate as a Bulb Check for Three 
Seconds when the Ignition Switch is Turned to the "ON" Position.

IGNITION
SWITCH (IG1)

FUSIBLE
LINK

1

JOINT 
CONNECTOR 
(7)

JUNCTION 
BLOCK

RELAY
BOX

COMBINATION
METER

POWER
SUPPLY

TPMS
RECEIVER

TPMS Receiver Power Supply and Ground, Ignition Signal Input and TPMS Warning Light Circuit

TIRE PRESSURE MONITORING SYSTEM (TPMS) DIAGNOSIS

TSB Revision

WHEEL AND TIRE

31-60

.

CIRCUIT OPERATION
For three 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.

.

TECHNICAL DESCRIPTION (COMMENT)
If the TPMS warning light does not illuminate for 
three seconds when the ignition switch is turned to 
the "ON" position, diagnose the TPMS warning light 
signal circuit, power supply to the TPMS receiver, 
ignition signal, and/or ground circuit.

.

TROUBLESHOOTING HINTS (THE MOST LIKELY 
CAUSES FOR THIS CASE:) 

• TPMS warning light signal harness wire open cir-

cuit

• Ignition signal harness wire of the TPMS receiver 

or battery power supply harness wire open circuit

• Ground harness wire of the TPMS receiver open 

circuit

• Malfunction of the combination meter

• Malfunction of the TPMS receiver

.

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

.

AC204170

CONNECTORS: D-02, D-04, D-28

D-02

D-04 (GR)

EJ

D-28

AC204171

CONNECTORS: D-111, D-112

D-112

BG

D-111

AC204173

CONNECTORS: D-208, D-210

D-208

D-210

AR

AC307592

G-28

CONNECTOR: G-28

AD

THIRD SEAT 
BELT (RH)

TPMS RECEIVER

AC308099 AD

RELAY BOX (FUSE No.18) 
IN ENGINE COMPARTMENT

TIRE PRESSURE MONITORING SYSTEM (TPMS) DIAGNOSIS

TSB Revision

WHEEL AND TIRE

31-61

STEP 1. Measure the voltage at G-28 TPMS receiver 
connector.

(1) Disconnect TPMS receiver connector G-28, and check at 

the harness connector (component side).

(2) Measure the voltage between terminal 5 and ground. It 

should measure battery positive voltage (approximately 12 

volts).

(3) Turn the ignition switch to the "ON" position.

AC307592 AE

CONNECTOR : G-28

AC308264

AC307575

G-28

CONNECTOR: G-28

AG

G-28

10

5

6

7

9 8

3

4

2 1

HARNESS CONNECTOR:
COMPONENT SIDE

TIRE PRESSURE MONITORING SYSTEM (TPMS) DIAGNOSIS

TSB Revision

WHEEL AND TIRE

31-62

(4) Measure the voltage between terminal 10 and ground. It 

should measure battery positive voltage (approximately 12 

volts).

Q: Is battery positive voltage (approximately 12 volts) 

present?
YES <all the measured voltages are equivalent to 
battery positive voltage> : Go to Step 6.
NO <voltage between terminal 5 and ground is not 
battery positive voltage> : Go to Step 2.
NO <voltage between terminal 10 and ground is not 
battery positive voltage> : Go to Step 4.

AC308264

AC307575

G-28

CONNECTOR: G-28

AH

G-28

10

5

6

7

9 8

3

4

2 1

HARNESS CONNECTOR:
COMPONENT SIDE