Mitsubishi Montero (2002-2004). Manual - part 378

INPUT SIGNAL PROCEDURES

TSB Revision

SWS INPUT SIGNAL PROCEDURES

54Bc-59

STEP 2. Check the battery ground circuit to the driver's 
seat belt switch. Test at driver's seat belt switch connector 
F-18.
(1) Disconnect driver's seat belt switch connector F-18 and 

measure the resistance available at the wiring harness side 
of the connector.

(2) Measure the resistance value between terminal 1 and 

ground.

• The resistance should equal 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 5.
NO :  Go to Step 3.

STEP 3. Check driver's seat belt switch connector F-18 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is driver's seat belt switch connector F-18 in good 

condition?
YES : Go to Step 4.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. If the functions, which are described in 

"CIRCUIT OPERATION", work normally, the input 
signal from the driver's seat belt switch should be 
normal.

AC204177

CONNECTOR : F-18

AD

HARNESS SIDE

2 1

F-18

ACX01670

2 1

AB

CONNECTOR F-18
(HARNESS SIDE)

AC204177

CONNECTOR : F-18

AD

HARNESS SIDE

2 1

F-18

INPUT SIGNAL PROCEDURES

TSB Revision

SWS INPUT SIGNAL PROCEDURES

54Bc-60

STEP 4. Check the wiring harness between driver's seat 
belt switch connector F-18 (terminal 1) and ground.
Q: Is the wiring harness between driver's seat belt switch 

connector F-18 (terminal 1) and ground in good 
condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. If the 
functions, which are described in "CIRCUIT 
OPERATION", work normally, the input signal from 
the driver's seat belt switch should be normal.

STEP 5. Check driver's seat belt switch connector F-18 and 
ETACS-ECU connector D-224 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are driver's seat belt switch connector F-18 and ETACS-

ECU connector D-224 in good condition?
YES : Go to Step 6.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. If the functions, which are described in 

"CIRCUIT OPERATION", work normally, the input 
signal from the driver's seat belt switch should be 
normal.

AC204177

CONNECTOR : F-18

AD

HARNESS SIDE

2 1

F-18

AC204174

CONNECTOR : D-224

AD

D-224(B)

D-224(B)

HARNESS SIDE

21

23

24

22

32

3433

31

26

27

28

3029

38

39

40

36

37

25

35

AC204177

CONNECTOR : F-18

AD

HARNESS SIDE

2 1

F-18

INPUT SIGNAL PROCEDURES

TSB Revision

SWS INPUT SIGNAL PROCEDURES

54Bc-61

STEP 6. Check the wiring harness between driver's seat 
belt switch connector F-18 (terminal 2) and ETACS-ECU 
connector D-224 (terminal 25).

NOTE: Also check intermediate connector D-125 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate connectors D-125 is damaged, 
Repair or replace the damaged component(s) as described in 
GROUP 00E, Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between driver's seat belt switch 

connector F-18 (terminal 2) and ETACS-ECU connector 
D-224 (terminal 25) in good condition?
YES : Replace the ETACS-ECU. If the functions, which are 

described in "CIRCUIT OPERATION", work normally, 
the input signal from the driver's seat belt switch 
should be normal.

NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. If the 
functions, which are described in "CIRCUIT 
OPERATION", work normally, the input signal from 
the driver's seat belt switch should be normal.

AC204174

CONNECTOR : D-224

AD

D-224(B)

D-224(B)

HARNESS SIDE

21

23

24

22

32

3433

31

26

27

28

3029

38

39

40

36

37

25

35

AC204177

CONNECTOR : F-18

AD

HARNESS SIDE

2 1

F-18

AC204170

CONNECTOR : D-125

AO

9

8

6 7

5

3 4

20

32

21

33

43

17 18

30

41

16

29

28

39 40

13

25

12

24

35 36

14

26

37

15

27

38

19

31

42

1

10

22

2

11

23

34

INPUT SIGNAL PROCEDURES

TSB Revision

SWS INPUT SIGNAL PROCEDURES

54Bc-62

INSPECTION PROCEDURE P-4: ETACS-ECU does not receive any signal from all the door switches.

All Door Switches Input Circuit

AC204171

CONNECTOR : D-111

AG

AC204170

CONNECTOR : D-125

BE