Mitsubishi 380. Manual — part 734

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-347

STEP 19. Check the CAN bus lines between joint
connector (3) and the multi-center display unit . Measure
the resistance between joint connector (3) C-02 and
multi-center display unit connector C-05.

NOTE: If diagnosing CAN-BUS on vehicle not equipped
with multi-centre display, go to Step 20.

• 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 joint connector (3) C-02 and multi-center display

unit connector C-05, and measure the resistance at the
wiring harness sides of joint connector (3) C-02 and
multi-center display unit connector C-05.

(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.

16DB490A

CONNECTOR: C-05

HARNESS SIDE

C-05 (B)

16DB408A

CONNECTOR: C-02

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-348

(4) Measure the resistance between joint connector (3)

terminal 8 and middle-grade multi-center display connector
terminal 13.

OK: 2 ohms or less

(5) Measure the resistance between joint connector (3)

terminal 19 and middle-grade multi-center display
connector terminal 12.

OK: 2 ohms or less

NOTE: If diagnosing CAN-BUS on vehicle not equipped
with multi-centre display, go to Step 20.

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 multi-center display may be suspected.
Diagnose the multi-center display . Refer to GROUP
54A, Multi-center display, equipment diagnosis

P.54A-284

.

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 the multi-center display unit
connector.

AC204582

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

8

2

10 9

1

5

3

4

6

7

20191817161514131211

TEST
HARNESS

HARNESS SIDE: C-05

CJ

AC204582

HARNESS SIDE: C-02

CK

11
22

10
21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

8

2

10 9

1

5

3

4

6

7

20191817161514131211

HARNESS SIDE: C-05

TEST
HARNESS

TEST
HARNESS

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-349

STEP 20. Check the CAN bus lines between joint
connector (3) and the data link connector. Measure the
resistance between joint connector (3) C-02 and data link
connector C-125.

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

resistance between the wiring harness side connector of
joint connector (3) C-02 and wiring harness side connector
of data link connector C-125.

(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.

16DB517A

C-125

CONNECTORS: C-02, C-125

C-02

C-02

C-125 (B)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-350

(4) Measure the resistance between joint connector (3)

terminal 18 and data link connector terminal 14.

OK: 2 ohms or less

(5) Measure the resistance between joint connector (3)

terminal 7 and data link connector terminal 6.

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, refer to

diagnostics item 9: Check the CAN_L and H lines for
a short circuit (Refer to

P.54C-239

).

NO : If all the resistances measure 2 ohms or less, repair

the wiring harness between joint connector (3) and
the data link connector.

AC204582DI

11
22

10
21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

TEST
HARNESS

HARNESS SIDE: C-02

TEST
HARNESS

Y

8

16

15

7

5

1314

6

12

4

2

1011

3

9

1

HARNESS SIDE: C-125

AC204582

HARNESS SIDE: C-02

TEST
HARNESS

DH

11
22

10
21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

Y

8

16

15

7

5

1314

6

12

4

2

1011

3

9

1

TEST
HARNESS

HARNESS SIDE: C-125