Mitsubishi Montero (2004+). Manual - part 968

TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>

TSB Revision

AUTOMATIC TRANSMISSION

23A-447

STEP 11. Using scan tool MB991958, check data list item 
23: Stoplight Switch.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to data reading mode.

• Item 23: Stoplight Switch − Active Trac 4WD II.

• When the brake pedal is depressed, the display on 

scan tool MB991958 should be "ON."

• When the brake pedal is not depressed, the display 

on scan tool MB991958 should be "OFF."

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?

YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-6

.

NO :  Replace the PCM.

AC307591 AC

MB991911

MB991824

MB991827

AC307591

DATA LINK

CONNECTOR

TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>

TSB Revision

AUTOMATIC TRANSMISSION

23A-448

DTC 31: Transfer Shift Lever Switch System

ACX02035AB

Transfer Shift Lever Switch System Circuit

AC204170

CONNECTOR : D-01

CD

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

TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>

TSB Revision

AUTOMATIC TRANSMISSION

23A-449

.

CIRCUIT OPERATION

• Battery positive voltage is applied to the transfer 

shift lever switch (terminal 1) when the ignition 
switch is turned "ON."

• Battery positive voltage is applied to the trans-

fer-ECU terminal 20, 21, 22, or 23 when the 
transfer shift lever is in the "2H," "4H," "4HLc" or 
"4LLc." The transfer-ECU judges that the transfer 
shift lever is in the "2H," "4H," "4HLc" or "4LLc" 
when the battery positive voltage is applied.

.

DTC SET CONDITIONS
In the case that the input signal from the transfer shift 
lever switch is open or shorted, the DTC 31 is set as 
the open circuit or the short circuit of the transfer shift 
lever switch system.

.

TROUBLESHOOTING HINTS (THE MOST LIKELY 
CAUSES FOR THIS CODE TO BE SET ARE:)

• Malfunction of the transfer shift lever switch

• Malfunction of the ignition switch

• Damaged harness, connector

• Malfunction of the transfer-ECU

DIAGNOSIS

Required Special Tool:

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

• MB991824: V.C.I.

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

AC204191

CONNECTORS : D-208, D-212

5 6

2

4

3

1

JUNCTION BLOCK
(FRONT VIEW)

3

10

9

4

11

8

7

1

5

2

6

D-208

D-208

D-212

D-212

AS

AC204194

CONNECTORS : E-11, E-109

E-109

E-109

E-11

E-11

AW

3

10

16

9

7 8

6

1

4

2

5

11

14

1213

15

11 12

25

24

13

26

9

22

7

6

20

19

8

21

10

23

5

4

17

2

1

15

14

3

16

18

AC204175

CONNECTOR : E-116

AH

6

2

5

4

3

1

TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>

TSB Revision

AUTOMATIC TRANSMISSION

23A-450

STEP 1. Using scan tool MB991958, check data list item 06: 
Transfer Shift Lever Position.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to data reading mode.

• Item 06: Transfer Shift Lever Position.

• Display should be the same as the actual transfer 

shift lever position.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is switch operating properly?

YES : If can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-6

.

NO :  Go to Step 2.

STEP 2. Check the transfer shift lever switch.
Check for resistance between terminals for each transfer shift 
lever position.

Q: Is switch operating properly?

YES : Go to Step 3.
NO :  Replace the transfer shift lever switch. Refer to 

P.23A-563

, Transmission Control.

AC307591 AC

MB991911

MB991824

MB991827

AC307591

DATA LINK

CONNECTOR

TRANSFER SHIFT 
LEVER POSITION

TERMINAL 
NUMBER

SPECIFIED 
CONDITION

2H

1 

− 3

Less than 2 ohms.

4H

1 

− 5

4HLc

1 

− 6

4LLc

1 

− 2

ACX01331AB

4LLc

4HLc

4H

2H