Mitsubishi Montero (2004+). Manual - part 502

TIRE PRESSURE MONITORING SYSTEM (TPMS) DIAGNOSIS

TSB Revision

WHEEL AND TIRE

31-79

INSPECTION PROCEDURE 5: Communication between the Scan Tool and the TPMS is not Possible.

IGNITION
SWITCH (IG1)

FUSIBLE
LINK

1

FUSIBLE
LINK

2

JOINT 
CONNECTOR (7)

JOINT 
CONNECTOR 
(5)

JUNCTION 
BLOCK

JUNCTION 
BLOCK

DATA LINK
CONNECTOR

RELAY
BOX

POWER
SUPPLY

TPMS
RECEIVER

FRONT SIDE

Data Link Connector Circuit

TIRE PRESSURE MONITORING SYSTEM (TPMS) DIAGNOSIS

TSB Revision

WHEEL AND TIRE

31-80

.

CIRCUIT OPERATION
The diagnostic output is made from the TPMS 
receiver (terminal 1) to the diagnostic output terminal 
(terminal 7) of the data link connector.

.

TECHNICAL DESCRIPTION (COMMENT)
When communication with the scan tool is not possi-
ble, the cause is probably an open circuit in the diag-
nostic output circuit or an open circuit in the TPMS 
receiver power/ground circuit.

.

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

• Damaged harness wire or connector

• Malfunction of the TPMS receiver

.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

.

AC204170

CONNECTOR: D-29

D-29

EK

AC204171

CONNECTOR : D-112

AU

AC204170

CONNECTOR : D-118

BW

D-118(B)

AC307592

G-28

CONNECTOR: G-28

AD

THIRD SEAT 
BELT (RH)

TPMS RECEIVER

TIRE PRESSURE MONITORING SYSTEM (TPMS) DIAGNOSIS

TSB Revision

WHEEL AND TIRE

31-81

STEP 1. Check the TPMS warning light.

Check whether the TPMS warning light illuminates for three 
seconds after the ignition switch is turned to the "ON" position.
Q:  Does the TPMS warning light illuminate for three 

seconds?
YES : Check that the TPMS warning light illuminates for 

three seconds and then goes out. And then go to Step 
2.

NO :  Go to TPMS Inspection Procedure No.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" (Refer to 

P.31-59

).

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

TIRE PRESSURE MONITORING SYSTEM (TPMS) DIAGNOSIS

TSB Revision

WHEEL AND TIRE

31-82

STEP 2. Check the following connectors.

• Joint connector D-29

• Intermediate connector D-112

• Data link connector D-118

• TPMS receiver connector G-28

Check the connectors for loose, corroded or damaged termi-
nals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?

YES : Go to Step 3.
NO :  Repair it. And then go to Step 4.

AC204170

CONNECTOR : D-29

CR

9 10

8

6 7

31 32

30

29

18 19 20 21

5

4

2

1

3

27

26

24

23

25

12 13 14 15 16 17

28

11
22
33

HARNESS 
SIDE

AC204171 AL

CONNECTOR : D-112

2 3

27

32

28

33

16

15

4 5

19

18

29

17

34

7 8

35

22

21

9 10

30

36

31

37

25

24

23

6

20

1

14

26

11

13

12

38

AC204170

CONNECTOR : D-118

AN

HARNESS 
SIDE

D-118(B)

D-118(B)

1

9

2

10

3

11

4

12

5

13

6

14

7

15

8

16

AC307592 AE

CONNECTOR : G-28