Mitsubishi 380. Manual - part 743

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-383

STEP 4. Check the CAN bus lines between intermediate 
connector C-29 and the joint connector (3). Measure the 
resistance between intermediate connector C-29 and 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 intermediate 

connector C-29, and measure the resistance between the 
wiring harness side connector of joint connector (3) C-02 
and the female side connector of intermediate connector 
C-29 (instrument panel wiring harness side).

(2) Turn the ignition switch to the "LOCK" (OFF) position.

CAUTION

Disconnect the negative battery terminal. For details refer 
to 

P.54C-4

.

(3) Disconnect the negative battery terminal.

16DB479A

CONNECTORS: C-02, C-29

C-02

C-02

C-29

C-29

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-384

(4) Measure the resistance between intermediate connector 

terminal 12 and joint connector (3) terminal 20.

OK: 2 ohms or less

(5) Measure the resistance between intermediate connector 

terminal 11 and joint connector (3) terminal 9.

OK: 2 ohms or less

CAUTION

Strictly observe the specified wiring harness repair proce-
dure. For details refer to 

P.54C-5

.

Q: Do all the resistances measure 2 ohms or less?

YES : If all the resistances measure 2 ohms or less, power 

supply to the ABS-ECU may be suspected. Diagnose 
the ABS system. Refer to GROUP 35B ABS 
diagnosis 

P.35B-74

.

NO  :  If either of the resistances measures more than 2 

ohms or all the resistances measure more than 2 
ohms, repair the wiring harness between joint 
connector (3) and intermediate connector C-29. 

AC204582

35

34

36

30

38

29

17

13 12 11

37

31

33 32

26

27

28

16

14

15

3 2

4

18

6

7

21 20

5

19

9

10

24 23

25

8

22

1

TEST 
HARNESS

FEMALE SIDE: C-29

HARNESS SIDE: C-02

TEST 
HARNESS

11
22

10
21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

CR

AC204582

35

34

36

30

38

29

17

13 12 11

37

31

33 32

26

27

28

16

14

15

3 2

4

18

6

7

21 20

5

19

9

10

24 23

25

8

22

1

TEST 
HARNESS

FEMALE SIDE: C-29

HARNESS SIDE: C-02

TEST 
HARNESS

11
22

10
21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

CQ

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-385

DIAGNOSTIC ITEM 14: Failure in the lines between CAN main bus line and the ETACS-ECU.

CAUTION

When servicing a CAN bus line, ground yourself 
by touching a metal object such as an unpainted 
water pipe. If you fail to do so, a component con-
nected to the CAN bus line may be damaged.

.

TROUBLE JUDGMENT

If the MUT-III cannot received signals from 
ETACS-ECU, CAN bus line connector(s) are broken 
or an open circuit has occurred.

.

COMMENTS ON TROUBLE SYMPTOM

The wiring harness wire or connectors may have 
loose, corroded, or damage terminals, or terminals 
pushed back in the connector, or the ETACS-ECU 
may be defective.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• The wiring harness or connectors may have 

loose, corroded, or damage terminals, or termi-
nals pushed back in the connector

• The ETACS-ECU may be defective

16DB408A

CONNECTOR: C-02

16DB474A

C-218 (GR)

CONNECTOR: C-218

HARNESS SIDE

JUNCTION BLOCK

(REAR VIEW)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-386

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check joint connector (3) C-02 and ETACS-ECU 
connector C-218 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: Are joint connector (3) C-02 and ETACS-ECU connector 

C-218 in good condition?
YES : Go to Step 2.
NO :  Repair the damaged parts. Replace the joint 

connector as necessary.

16DB408A

CONNECTOR: C-02

16DB474A

C-218 (GR)

CONNECTOR: C-218

HARNESS SIDE

JUNCTION BLOCK

(REAR VIEW)

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