Mitsubishi Montero (2002-2004). Manual - part 945

DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-263

.

CIRCUIT OPERATION
When turning the ignition switch to "ON," the trans-
fer-ECU (terminal number 13) receives battery volt-
age from the ignition switch.

.

DTC SET CONDITIONS
When power supply voltage drops to 9.5 volts and 
less, the DTC 11 is set as low voltage. When power 
supply voltage rises to 18 volts and over, the DTC 12 
is set as high voltage.

.

AC204191

CONNECTORS : D-208, D-210

D-208

D-208

D-210

D-210

AP

5 6

2

4

3

1

5

4

12 13

3

2

9

7 8

10

6

1

11

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

DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-264

TROUBLESHOOTING HINTS (The most likely 
causes for this code to be set are:)

• Malfunction of the ignition switch

• Damaged harness, connector

• Malfunction of the transfer-ECU

DIAGNOSIS

Required Special Tool:

• MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, check data list item 09: 
Ignition switch power supply.

CAUTION

To prevent damage to scan tool MB991502, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to data reading mode for item 09, 

Ignition Switch Power Supply.

• The voltage should equal battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage equal battery positive voltage?

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 :  Go to Step 2.

STEP 2. Measure the power supply voltage at transfer-ECU 
connector E-109 by backprobing.
(1) Do not disconnect connector E-109.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 13 and ground by 

backprobing.

• The voltage should measure battery positive voltage.

(4) Turn the ignition switch to "LOCK" (OFF) position.
Q: Is the measured voltage battery positive voltage?

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

ACX01539AD

MB991502

16-PIN

AC204176

CONNECTOR : E-109

BB

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

AC204918

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

CA

E-109 HARNESS CONNECTOR : 
HARNESS SIDE

DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

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STEP 3. Check joint connector D-01, junction block 
connector D-208, D-210, intermediate connector E-11 and 
transfer-ECU connector E-109 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.

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

AC204191

CONNECTORS : D-208, D-210

D-208

D-208

D-210

D-210

AP

5 6

2

4

3

1

5

4

12 13

3

2

9

7 8

10

6

1

11

DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>

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DIAGNOSTIC TROUBLE CODE PROCEDURES

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Q: Are the connectors and terminals in good condition?

YES : Go to Step 4.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-

2

.

STEP 4. Check the harness for open circuit or short circuit 
to ground between junction block connector D-210 
terminal 12 and transfer-ECU connector E-109 terminal 13.
Q: Is the harness wire in good condition?

YES : Go to Step 6.
NO :  Repair or replace the harness wire.

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

AC204173

CONNECTOR : D-210

D-210

BO

5

4

12 13

3

2

9

7 8

10

6

1

11

AC204176

CONNECTOR : E-109

BB

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