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

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5

16

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15

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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

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22

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21

9

20

8

19

7

18

6

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14

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13

1

12

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10 9

1

5

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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

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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

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10
21

9

20

8

19

7

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6

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1

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Y

8

16

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5

1314

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12

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2

1011

3

9

1

TEST 
HARNESS

HARNESS SIDE: C-125