Mitsubishi Montero (2002-2004). Manual — part 738

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GROUP 13Ad

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SYMPTOM PROCEDURES

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INSPECTION PROCEDURE 1: Communication with Scan Tool Is Not Possible. (Comunication with All
Systems Is Not Possible.)

AK201152

WHITE

BLA

CK

BLA

CK

RED

RED

10

38

1

5

16

1

10

9

2

11

3

12

4

13

5

14

6

15

7

16

8

D-118

4

10

29

38

11

14 15 16

2 3

12 13

26

5 6 7 8 9

27 28

32 33

17 18 19 20 21 22 23 24

34

35

30

36

25

31

37

1

D-28

13

3

5

7

12

9

1

6

8

11

10

2

4

D-210

(MU801860)

DATA LINK
CONNECTOR

4

JUNCTION
BLOCK

FUSIBLE
LINK (2)

1

D-211

Data Link Connector Circuit

10

20A

AK200976

DATA LINK
CONNECTOR

AB

D-118(B)

CONNECTOR: D-118

AK201041AB

CONNECTOR: D-211

D-211(B)

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SYMPTOM PROCEDURES

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CIRCUIT OPERATION

• A battery positive voltage is applied on the data

link connector power terminal (terminal No. 16).
The ground terminals (terminal No. 4, No. 5) are
grounded to the vehicle body.

.

COMMENT

• The cause is probably a defect in power supply

system (including ground) for the on-board diag-
nostic test mode line.

.

TROUBLESHOOTING HINTS (The most likely
causes for this case: )

• Malfunction of the data link connector.

• Damaged harness wire.

DIAGNOSIS

STEP 1. Measure the power supply voltage at data link
connector D-118.
(1) Measure voltage between terminal No. 16 and ground.

• Voltage should be battery positive voltage.

Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Go to step 2.
NO : Check harness connectors D-210, D-211, D-28 at

intermediate connector for damage, and repair or
replace as required. Refer to GROUP 00E, Harness
Connector Inspection

P.00E-2

. If intermediate

connector D-210, D-211, D-28 are in good condition,
repair an open circuit between fusible link (2) and data
link connector D-118 (terminal No. 16). Then confirm
that the malfunction symptom is eliminated.

AK201041AC

CONNECTOR: D-210

D-210

AK201042

D-28

AB

CONNECTOR: D-28

AK201285

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

AB

D-118(B)

CONNECTOR: D-118

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01430

1 2 3 4 5 6 7 8

16

15

14

13

12

11

10

9

D-118 HARNESS
CONNECTOR:
COMPONENT SIDE

AN

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SYMPTOM PROCEDURES

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STEP 2. Check the continuity at data link connector D-118.
(1) Check for the continuity between terminal No. 4, No. 5 and

ground.

• Should be less than 2 ohms.

Q: Is the continuity normal?

YES : Replace the scan tool. Then confirm that the

malfunction symptom is eliminated.

NO : Repair an open circuit or harness damage between

data link connector D-118 (terminal No. 4, No. 5) and
ground. Then confirm that the malfunction symptom is
eliminated.

AK201285

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

AB

D-118(B)

CONNECTOR: D-118

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01431

1 2 3 4 5 6 7 8

16

15

14

13

12

11

10

9

D-118 HARNESS
CONNECTOR:
COMPONENT SIDE

AL