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