Mitsubishi 380. Manual — part 709

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-246

STEP 7. Check the combination meter for short circuit.
Measure the resistance at combination meter connector
C-101.

CAUTION

A digital multimeter should be used. For details refer to

P.54C-4

.

(1) Disconnect combination meter C-101, and measure the

resistance at the component side of combination meter
connector C-101.

(2) Measure the resistance between combination meter

connector terminals 14 and 15.

OK: 120

± 20 Ω

Q: Does the resistance measure 120

± 20 Ω?

YES : If the resistance measures 120

± 20 Ω, diagnose CAN

bus lines thoroughly by referring to

P.54C-323

.

NO : If the resistance does not measure 120

± 20 Ω,

replace the combination meter.

16DB499A

CONNECTOR: C-101

HARNESS SIDE

AC204582BY

COMPONENT SIDE: C-101

G

11
22

17

3

14

G

12

1

13

2

15

4

16

5

18

7

6

19

8

10

21

20

9

TEST
HARNESS

TEST HARNESS

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-247

STEP 8. Check the CAN_L and H lines (communication
lines including the ETACS-ECU) between joint connector
(3) and the ETACS-ECU 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 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 5 and 16.

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

12 .

NO : If the resistance measures less than 1 k

Ω, go to Step

9.

STEP 9. Check ETACS-ECU connector C-218 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 ETACS-ECU connector C-218 in good condition?

YES : Go to Step 10.
NO : Repair the damaged parts.

16DB408A

CONNECTOR: C-02

AC209438

TEST
HARNESS

AR

TEST

HARNESS

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

HARNESS SIDE: C-02

16DB474A

C-218 (GR)

CONNECTOR: C-218

HARNESS SIDE

JUNCTION BLOCK

(REAR VIEW)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-248

STEP 10. Check the CAN_L and H lines (communication
lines only) between joint connector (3) and the
ETACS-ECU for 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 ETACS-ECU

connector C-218, 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 5 and 16.

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

11 .

NO : If the resistance measures less than 1 k

Ω, repair the

wiring harness between joint connector (3) and the
ETACS-ECU connector.

16DB408A

CONNECTOR: C-02

16DB474A

C-218 (GR)

CONNECTOR: C-218

HARNESS SIDE

JUNCTION BLOCK

(REAR VIEW)

AC209438

TEST
HARNESS

AR

TEST

HARNESS

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

HARNESS SIDE: C-02

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-249

STEP 11. Check the ETACS-ECU for short circuit. Measure
the resistance at ETACS-ECU connector C-218.

CAUTION

A digital multimeter should be used. For details refer to

P.54C-4

.

(1) Disconnect ETACS-ECU connector C-218, and measure

the resistance at the component side of ETACS-ECU
connector C-218.

(2) Measure the resistance between ETACS-ECU connector

terminals 66 and 67.

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 less than 1 k

Ω, replace the

ETACS-ECU.

16DB474A

C-218 (GR)

CONNECTOR: C-218

HARNESS SIDE

JUNCTION BLOCK

(REAR VIEW)

16DB500A

COMPONENT SIDE: C-218

TEST
HARNESS

TEST
HARNESS