Mitsubishi Montero (2004+). Manual - part 967

TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>

TSB Revision

AUTOMATIC TRANSMISSION

23A-443

STEP 6. Measure the stoplight switch output voltage to the 
PCM at connector D-123 by backprobing.
(1) Remove the stoplight switch from the mounting bracket.
(2) Do not disconnect connector D-123.

(3) Measure the voltage between stoplight switch connector 

D-123 terminal 1 and ground by backprobing.

• When the switch button is out (closed circuit), voltage 

should equal battery positive voltage.

• When the switch button is depressed (open circuit), volt-

age should measure less than 1.0 volt.

Q: Is the measured voltage battery positive voltage with 

the switch button released (closed circuit), and less 
than 1.0 volt with the switch button depressed (open 
circuit)?
YES : Go to Step 8.
NO :  Go to Step 7.

STEP 7. Check the stoplight switch.
Refer to GROUP 35A, On-vehicle Service 

− Stoplight Switch 

Check 

P.35A-119

.

Q: Does the stoplight switch pass the checks?

YES : Go to Step 8.
NO :  Replace the stoplight switch. Refer to GROUP 35A, 

Brake Pedal 

P.35A-136

.

AC204170

CONNECTOR : D-123

CG

4

2

3

1

AC204918 BA

D-123 HARNESS CONNECTOR : 
HARNESS SIDE

4

2

3

1

ACX02208

BRAKE PEDAL

STOPLIGHT
SWITCH

AD

TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>

TSB Revision

AUTOMATIC TRANSMISSION

23A-444

STEP 8. Measure the stoplight switch output voltage at 
transfer-ECU connector E-104 by backprobing.
(1) Install the stoplight switch into the mounting bracket if it was 

removed.

(2) Do not disconnect connector E-104.

(3) Measure the voltage between terminal 34 and ground by 

backprobing.

• When the brake pedal is depressed, voltage should 

measure battery positive voltage.

• When the brake pedal is not depressed, voltage should 

measure less than 1.0 volt.

Q: Is the measured voltage battery positive voltage with 

the brake pedal depressed (closed circuit), and less 
than 1.0 volt with the brake pedal released (open 
circuit)?
YES : Go to Step 11.
NO :  Go to Step 9.

AC204176

CONNECTOR : E-104

BA

51

40

3839

50

41

52

48

37

46

35

47

36

45

34

43

32

44

33

49

42

31

AC204918 BV

E-104 HARNESS CONNECTOR : 
HARNESS SIDE

51

40

3839

50

41

52

48

37

46

35

47

36

45

34

43

32

44

33

49

42

31

TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>

TSB Revision

AUTOMATIC TRANSMISSION

23A-445

STEP 9. Check joint connector D-29, intermediate 
connector D-125, E-11 and transfer-ECU connector E-104 
for loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Are the connectors and terminals in good condition?

YES : Go to Step 10.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC204188

CONNECTORS : D-29, D-125

D-29

BA

D-125

D-125

D-29

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

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

AC204194

CONNECTORS : E-11, E-104

E-104

E-104

E-11

E-11

AV

51

40

3839

50

41

52

48

37

46

35

47

36

45

34

43

32

44

33

49

42

31

3

10

16

9

7 8

6

1

4

2

5

11

14

1213

15

TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>

TSB Revision

AUTOMATIC TRANSMISSION

23A-446

STEP 10. Check the harness for open circuit or short 
circuit to ground between stoplight switch connector 
D-123 terminal 1 and transfer-ECU connector E-104 
terminal 34.
Q: Is the harness wire in good condition?

YES : Go to Step 11.
NO :  Repair or replace the harness wire.

AC204170

CONNECTOR : D-123

CG

4

2

3

1

AC204176

CONNECTOR : E-104

BA

51

40

3839

50

41

52

48

37

46

35

47

36

45

34

43

32

44

33

49

42

31