Mitsubishi 380. Manual - part 669

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-87

(3) Measure the voltage between data link connector terminal 

14 and body ground.

OK: 4.0 V or less

Q: Does the voltage measure 4.0 V or less?

YES : If the voltage measures 4.0 V or less, diagnose CAN 

bus lines thoroughly by referring to 

P.54C-323

.

NO :  If the voltage measures more than 4.0 V, go to Step 

27.

STEP 4. Check intermediate connector C-29 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.

CAUTION

The strand end of the twisted wire should be within 10 cm 
(4 inches) from the connector. For details refer to 

P.54C-4

.

Q: Is intermediate connector C-29 in good condition?

YES : Go to Step 5.
NO :  Repair the damaged parts.

AC209365

HARNESS SIDE: C-125

FO

TEST 
HARNESS

Y

8

16

15

7

5

1314

6

12

4

2

1011

3

9

1

52DB014A

CONNECTOR: C-29

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-88

STEP 5. Check the CAN_H-side bus line (communication 
line including ECUs) of the front wiring harness for a short 
to the power supply. Measure the voltage at intermediate 
connector C-29.

CAUTION

A digital multimeter should be used. For details refer to 

P.54C-4

.

CAUTION

The test wiring harness should be used. For details refer to 

P.54C-4

.

(1) Disconnect intermediate connector C-29, and measure the 

voltage at the male side (at front wiring harness side).

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between intermediate connector 

terminal 11 and body ground.

OK: 4.0 V or less

Q: Does the voltage measure 4.0 V or less?

YES : If the voltage measures 4.0 V or less, go to Step 6.
NO :  If the voltage measures more than 4.0 V, go to Step 

23.

52DB014A

CONNECTOR: C-29

AC209365

2 3

27

32

28

33

16

15

4 5

19

18

29

17

34

7 8

35

22

21

9 10

30

36

31

37

25

24

23

6

20

1

14

26

11

13

12

38

AC209365

MALE SIDE: C-29

TEST 
HARNESS

FP

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-89

STEP 6. Check joint connector (3) C-02 for loose, corroded 
or damaged terminals, or terminals pushed back in the 
connector.

CAUTION

The strand end of the twisted wire should be within 10 cm 
(4 inches) from the connector. For details refer to 

P.54C-4

.

Check the joint connector at the wiring harness side for loose, 
corroded or damaged terminals, or terminals pushed back in 
the connector, and also check the short pin behind the connec-
tor for corrosion, deformation and delamination.
Q: Is joint connector (3) C-02 in good condition?

YES : Go to Step 7.
NO :  Repair the damaged parts. Replace the joint 

connector as necessary.

16DB408A

CONNECTOR: C-02

AC209350

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

AB

SHORT PIN

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-90

STEP 7. Check the CAN_H line (communication line 
including the combination meter) between joint connector 
(3) and the combination meter for a short to the power 
supply. Measure the voltage at joint connector (3) C-02.

CAUTION

A digital multimeter should be used. For details refer to 

P.54C-4

.

CAUTION

The test wiring harness should be used. For details refer to 

P.54C-4

.

(1) Disconnect joint connector (3) C-02, and measure the 

voltage at the wiring harness side of joint connector (3) 
C-02.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between joint connector (3) terminal 4 

and body ground.

OK: 4.0 V or less

Q: Does the voltage measure 4.0 V or less?

YES : If the voltage measures 4.0 V or less, go to Step 9.
NO :  If the voltage measures more than 4.0 V, go to Step 8.

16DB408A

CONNECTOR: C-02

AC209365

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

AC209365FQ

HARNESS SIDE: C-02

TEST 
HARNESS