Mitsubishi 380. Manual - part 712

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-258

STEP 22. Check the CAN_L and H lines (communication 
lines only) between joint connector (3) and the multi-center 
display unit  for a short circuit. Measure the resistance 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 multi-center display 

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

(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.

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

terminals 8 and 19.

OK: 1 k

Ω or more

CAUTION

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

P.54C-5

.

Q: Does the resistance measure 1 k

Ω or more?

YES : If the resistance measures 1 k

Ω or more, go to Step 

23  .

NO :  If the resistance measures less than 1 k

Ω, repair the 

wiring harness between joint connector (3) and 
multi-center display unit  connector.

16DB408A

CONNECTOR: C-02

16DB490A

CONNECTOR: C-05

HARNESS SIDE

C-05 (B)

AC209438

AC209438

TEST 
HARNESS

AW

TEST 

HARNESS

1110 9 8 7 6 5 4 3 2 1
22 21201918 171615141312

HARNESS SIDE: C-02

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-259

STEP 23. Check the multi-center display unit  for short 
circuit. Measure the resistance at multi-center display unit  
connector C-05.

CAUTION

A digital multimeter should be used. For details refer to 

P.54C-4

.

(1) Disconnect multi-center display unit  connector C-05, and 

measure the resistance at the component side of 
multi-center display unit  connector C-05.

(2) Measure the resistance between the multi-center display 

unit  connector terminals 12 and 13.

OK: 1 k

Ω or more

Q: Does the resistance measure 1 k

Ω or more?

YES : If the resistance measures 1 k

Ω or more, diagnose 

CAN bus lines thoroughly by referring to 

P.54C-323

.

NO :  If the resistance measures lower than 1 k

Ω, replace 

the multi-center display unit .

STEP 24. Check data link connector C-125 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 data link connector C-125 in good condition?

YES : Go to Step 25.
NO :  Repair the damaged parts.

16DB490A

CONNECTOR: C-05

HARNESS SIDE

C-05 (B)

AC209438

AC209438

COMPONENT SIDE: C-05

AZ

TEST 
HARNESS

TEST 
HARNESS

16DB501A

CONNECTOR: C-125

C-125 (B)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-260

STEP 25. Check the CAN_L and H lines (communication 
lines only) between joint connector (3) and the data link 
connector for a short circuit. Measure the resistance at 
joint connector (3) C-02.

• 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 measure the 

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

(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.

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

terminals 7 and 18.

OK: 1 k

Ω or more

Q: Does the resistance measure 1 k

Ω or more?

YES : If the resistance measures 1 k

Ω or more, go to Step 

26  .

NO :  If the resistance measures less than 1 k

Ω, repair the 

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

16DB408A

CONNECTOR: C-02

AC209438

1110 9 8 7 6 5 4 3 2 1
22 21201918 171615141312

AC209438

AC209438

TEST 
HARNESS

BA

TEST 

HARNESS

HARNESS SIDE: C-02

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-261

STEP 26. Check the CAN_L and H lines (communication 
lines only) between joint connector (3) and the 
intermediate connector for a short circuit. Measure the 
resistance 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 intermediate connector C-29 and joint 

connector (3) C-02, and measure the resistance at the 
wiring harness side of joint connector (3) C-02.

(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.

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

terminals 9 and 20.

OK: 1 k

Ω or more

CAUTION

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

P.54C-5

.

Q: Does the resistance measure 1 k

Ω or more?

YES : If the resistance measures 1 k

Ω or more, diagnose 

CAN bus lines thoroughly by referring to 

P.54C-323

.

NO :  If the resistance measures less than 1 k

Ω, repair the 

wiring harness between intermediate connector C-29 
and joint connector (3).

16DB479A

CONNECTORS: C-02, C-29

C-02

C-02

C-29

C-29

AC209438

AC209438

TEST 
HARNESS

BB

TEST 

HARNESS

1110 9 8 7 6 5 4 3 2 1
22 21201918 171615141312

HARNESS SIDE: C-02