Mitsubishi 380. Manual — part 737

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-359

(4) Measure the resistance between intermediate connector

terminal 11 and ABS-ECU connector terminal 25.

OK: 2 ohms or less

(5) Measure the resistance between intermediate connector

terminal 12 and ABS-ECU connector terminal 14.

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, go to

Step 27.

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 intermediate
connector C-29 and the ABS-ECU connector.

16DB513A

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

TEST
HARNESS

TEST
HARNESS

HARNESS SIDE: A-02

MALE SIDE: C-29

16DB514A

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

TEST
HARNESS

TEST
HARNESS

HARNESS SIDE: A-02

MALE SIDE: C-29

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-360

STEP 27. 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-361

(4) Measure the resistance between intermediate connector

terminal 11 and joint connector (3) terminal 9.

OK: 2 ohms or less

(5) Measure the resistance between intermediate connector

terminal 12 and joint connector (3) terminal 20.

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, go to

Step 28 or power supply to the ABS-ECU may be
suspected. Diagnose the ABS system. Refer to
GROUP 35B, ABS diagnosis

P.35B-72

.

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

CQ

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

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-362

STEP 28. Check the CAN bus lines between the A/T-ECU
and the ENGINE-ECU. Measure the resistance between
A/T-ECU connector B-19 and ENGINE-ECU connector B-21.

NOTE: when diagnosing CAN-BUS on vehicles with
manual transmission (M/T), disregard A/T-ECU and it’s wir-
ing circuits and check between ABS-ECU and
ENGINE-ECU only.

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

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 A/T-ECU connector B-19 and ENGINE-ECU

connector B-21, and measure the resistance between each
wiring harness side connector.

(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.

16DB480A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

A/T

CONTROL

UNIT

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER