Mitsubishi Montero (2004+). Manual - part 831

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-581

STEP 17. Check the ground circuit to the back door lock 
key cylinder switch. Test at back door lock key cylinder 
switch connector I-06.
(1) Disconnect back door lock key cylinder switch connector 

I-06 measure the resistance available at the wiring harness 
side of the connector.

(2) Measure the resistance value between terminal 2 and 

ground.

• The resistance should equal 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 19.
NO :  Go to Step 18.

STEP 18. Check the wiring harness between back door 
lock key cylinder switch connector I-06 (terminal 2) and 
ground.
Q: Is the wiring harness between back door lock key 

cylinder switch connector I-06 (terminal 2) 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 
systems, which are described in "CIRCUIT 
OPERATION", work normally, the input signal from 
the back door lock key cylinder switch should be 
normal.

AC204182

CONNECTOR : I-06

AD

HARNESS SIDE

2

3

1

I-06

AC204526

1

3 2

AB

CONNECTOR I-06
(HARNESS SIDE)

AC204182

CONNECTOR : I-06

AD

HARNESS SIDE

2

3

1

I-06

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-582

STEP 19. Check ETACS-ECU connectors D-223 and D-224 
for loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Are ETACS-ECU connectors D-223 and D-224 in good 

condition?
YES : Go to Step 20.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. If the systems, which are described in 

"CIRCUIT OPERATION", work normally, the input 
signal from the back door lock key cylinder switch 
should be normal.

AC204192

CONNECTORS: D-223, D-224

AD

HARNESS SIDE

D-224 (B)

D-223 (B)

D-223 (B)

HARNESS SIDE

42

43

50

51

45

46

53

54

52

44

48

5655

47

49

41

D-224 (B)

21

23

24

22

32

3433

31

26

27

28

3029

38

39

40

36

37

25

35

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-583

STEP 20. Check the wiring harness between back door 
lock key cylinder switch connector I-06 (terminals 1 and 3) 
and ETACS-ECU connectors D-224 (terminal 28) and D-223 
(terminal 45).

AC204192

CONNECTORS: D-223, D-224

AD

HARNESS SIDE

D-224 (B)

D-223 (B)

D-223 (B)

HARNESS SIDE

42

43

50

51

45

46

53

54

52

44

48

5655

47

49

41

D-224 (B)

21

23

24

22

32

3433

31

26

27

28

3029

38

39

40

36

37

25

35

AC204182

CONNECTOR : I-06

AD

HARNESS SIDE

2

3

1

I-06

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-584

NOTE: Also check intermediate connectors D-111 and G-11 for 
loose, corroded, or damaged terminals, or terminals pushed 
back in the connector. If intermediate connectors D-111 or G-11 
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 back door lock key 

cylinder switch connector I-06 (terminals 1 and 3) and 
ETACS-ECU connectors D-224 (terminal 28) and D-223 
(terminal 45) in good condition?
YES : Replace the ETACS-ECU. If the systems, which are 

described in "CIRCUIT OPERATION", work normally, 
the input signal from the back door lock key cylinder 
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 
systems, which are described in "CIRCUIT 
OPERATION", work normally, the input signal from 
the back door lock key cylinder switch should be 
normal.

STEP 21. Check driver's door lock key cylinder switch 
connector H-03 for loose, corroded or damaged terminals, 
or terminals pushed back in the connector. 
Q: Is driver's door lock key cylinder switch connector H-03 

in good condition?
YES : Go to Step 22.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. If the systems, which are described in 

"CIRCUIT OPERATION", work normally, the input 
signal from the driver's door lock key cylinder switch 
should be normal.

STEP 22. Check the wiring harness between driver's door 
lock key cylinder switch connector H-03 (terminal 2) and 
ground.

AC204171

CONNECTOR : D-111

BH

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

AC204179

CONNECTOR : G-11

AE

3

9

2

8

6

5

7

4

1

AC204180

CONNECTOR : H-03

AB

HARNESS SIDE

<DRIVER'S SIDE>

H-03(B)

H-03(B)

1

2

3

AC204180

CONNECTOR : H-03

AB

HARNESS SIDE

<DRIVER'S SIDE>

H-03(B)

H-03(B)

1

2

3