Mitsubishi Montero (2004+). Manual - part 829

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-573

STEP 4. Check the ground circuit to the driver's door lock 
key cylinder switch. Test at driver's door lock key cylinder 
switch connector H-03.
(1) Disconnect driver's door lock key cylinder switch connector 

H-03 and 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 6.
NO :  Go to Step 5.

STEP 5. Check the wiring harness between driver's door 
lock key cylinder switch connector H-03 (terminal 2) and 
ground.

AC204180

CONNECTOR : H-03

AB

HARNESS SIDE

<DRIVER'S SIDE>

H-03(B)

H-03(B)

1

2

3

3

1

2

ACX01601AB

CONNECTOR H-03
(HARNESS SIDE)

AC204180

CONNECTOR : H-03

AB

HARNESS SIDE

<DRIVER'S SIDE>

H-03(B)

H-03(B)

1

2

3

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-574

NOTE: Also check intermediate connector D-25 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate connectors D-25 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 door lock key 

cylinder switch connector H-03 (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 driver's door lock key cylinder switch should be 
normal.

STEP 6. Check ETACS-ECU connector D-223 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is ETACS-ECU connector D-223 in good condition?

YES : Go to Step 7.
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 rear door switch (LH) should be 
normal.

AC204170

CONNECTOR : D-25

AE

10

9

31

30

20 21

7

6

28

17 18

8

19

29

4

3

25 26

14 15

1

23

12

2

13

24

5

16

27

11

22

32

AC204174

CONNECTOR : D-223

AC

D-223(B)

D-223(B)

HARNESS SIDE

42

43

50

51

45

46

53

54

52

44

48

5655

47

49

41

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-575

STEP 7. Check driver's door lock key cylinder switch 
connector H-03 and ETACS-ECU connector D-223 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Are driver's door lock key cylinder switch connector 

H-03 and ETACS-ECU connector D-223 in good 
condition?
YES : Go to Step 8.
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 8. Check the wiring harness between driver's door 
lock key cylinder switch connector H-03 (terminals 1 and 
3) and ETACS-ECU connector D-223 (terminals 52 and 50).

AC204174

CONNECTOR : D-223

AC

D-223(B)

D-223(B)

HARNESS SIDE

42

43

50

51

45

46

53

54

52

44

48

5655

47

49

41

AC204180

CONNECTOR : H-03

AB

HARNESS SIDE

<DRIVER'S SIDE>

H-03(B)

H-03(B)

1

2

3

AC204174

CONNECTOR : D-223

AC

D-223(B)

D-223(B)

HARNESS SIDE

42

43

50

51

45

46

53

54

52

44

48

5655

47

49

41

AC204180

CONNECTOR : H-03

AB

HARNESS SIDE

<DRIVER'S SIDE>

H-03(B)

H-03(B)

1

2

3

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-576

NOTE: Also check intermediate connector D-25 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate connectors D-25 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 door lock key 

cylinder switch connector H-03 (terminals 1 and 3) and 
ETACS-ECU connector D-223 (terminals 52 and 50) in 
good condition?
YES : Replace the ETACS-ECU. 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.

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 driver's door lock key cylinder switch should be 
normal.

STEP 9. Check front passenger's door lock key cylinder 
switch connector H-18 for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Is front passenger's door lock key cylinder switch 

connector H-18 in good condition?
YES : Go to Step 10.
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 front passenger's door lock key 
cylinder switch should be normal.

AC204170

CONNECTOR : D-25

AE

10

9

31

30

20 21

7

6

28

17 18

8

19

29

4

3

25 26

14 15

1

23

12

2

13

24

5

16

27

11

22

32

AC204181

CONNECTOR : H-18

AC

HARNESS SIDE

<PASSENGER'S SIDE>

H-18(B)

H-18(B)

1

2

3