Mitsubishi 380. Manual — part 672

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-99

STEP 18. Check the CAN_H line (communication line
including the multi-center display unit) between joint
connector (3) and multi-center display connector for a
short to the power supply. Measure the voltage 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 measure the

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

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between joint connector (3) terminal 8

and body ground.

OK: 4.0 V or less

Q: Does the voltage measure 4.0 V or less?

YES : If the voltage measures 4.0 V or less, go to Step 21.
NO : If the voltage measures more than 4.0 V, go to Step

19.

STEP 19. Check multi-center display unit connector C-05
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

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 multi-center display unit connector C-05 in good

condition?
YES : Go to Step 20.
NO : Repair the damaged parts.

16DB408A

CONNECTOR: C-02

AC209365

11

22

10

21

9

20

8

19

7

18

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16

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1

12

AC209365GG

HARNESS SIDE: C-02

TEST HARNESS

16DB490A

CONNECTOR: C-05

HARNESS SIDE

C-05 (B)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-100

STEP 20. Check the CAN_H line (communication line only)
between joint connector (3) and multi-center display unit
connector for a short to the power supply. Measure the
voltage 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 voltage at the wiring
harness side of joint connector (3) C-02.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between joint connector (3) terminal 8

and body ground.

OK: 1.0 V or less

CAUTION

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

P.54C-5

.

Q: Does the voltage measure 1.0 V or less?

YES : If the voltage measures 1.0 V or less, diagnose CAN

bus lines thoroughly by referring to

P.54C-323

.

NO : If the voltage measures more than 1.0 V, repair the

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

16DB408A

CONNECTOR: C-02

16DB490A

CONNECTOR: C-05

HARNESS SIDE

C-05 (B)

AC209365

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

AC209365GG

HARNESS SIDE: C-02

TEST HARNESS

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-101

STEP 21. Check the CAN_H line (communication line only)
between joint connector (3) and the data link connector for
a short to the power supply. Measure the voltage 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 measure the

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

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between joint connector (3) terminal 7

and body ground.

OK: 1.0 V or less

CAUTION

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

P.54C-5

.

Q: Does the voltage measure 1.0 V or less?

YES : If the voltage measures 1.0 V or less, go to Step 22.
NO : If the voltage measures more than 1.0 V, repair the

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

16DB408A

CONNECTOR: C-02

AC209365

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

AC209365FW

HARNESS SIDE: C-02

TEST HARNESS

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-102

STEP 22. Check the CAN_H line (communication line only)
between intermediate connector C-29 and joint connector
(3) for a short to the power supply. Measure the voltage 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 voltage at the wiring
harness side of joint connector (3) C-02.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between joint connector (3) terminal 9

and body ground.

OK: 1.0 V or less

CAUTION

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

P.54C-5

.

Q: Does the voltage measure 1.0 V or less?

YES : If the voltage measures 1.0 V or less, diagnose CAN

bus lines thoroughly by referring to

P.54C-323

.

NO : If the voltage measures more than 1.0 V, 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

AC209365

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10

21

9

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8

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7

18

6

17

5

16

4

15

3

14

2

13

1

12

AC209365FY

HARNESS SIDE: C-02

TEST HARNESS