Mitsubishi 380. Manual — part 676

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-115

STEP 34. Check the CAN_L line (communication line
including the ETACS-ECU) between joint connector (3) and
the ETACS-ECU connector for a short to the power supply.
Measure the voltage 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

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

16 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 37.
NO : If the voltage measures more than 4.0 V, go to Step

35.

STEP 35. 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 36.
NO : Repair the damaged parts.

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

AC209365

AC209365GC

HARNESS SIDE: C-02

TEST
HARNESS

16DB474A

C-218 (GR)

CONNECTOR: C-218

HARNESS SIDE

JUNCTION BLOCK
(REAR VIEW)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-116

STEP 36. Check the CAN_L line (communication line only)
between joint connector (3) and ETACS-ECU 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 ETACS-ECU

connector C-218, 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

16 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
ETACS-ECU connector.

16DB408A

CONNECTOR: C-02

16DB474A

C-218 (GR)

CONNECTOR: C-218

HARNESS SIDE

JUNCTION BLOCK
(REAR VIEW)

AC209365

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

AC209365

AC209365GC

HARNESS SIDE: C-02

TEST
HARNESS

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-117

STEP 37. Check the CAN_L line (communication line
including the A/C-ECU) between joint connector (3) and
the A/C-ECU 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

17 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 40.
NO : If the voltage measures more than 4.0 V, go to Step

38.

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

AC209365

AC209365GD

HARNESS SIDE: C-02

TEST
HARNESS

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-118

STEP 38. Check A/C-ECU connector C-15 automatic air
conditioning system 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 A/C-ECU connector C-15 automatic air conditioning

system in good condition?
YES : Go to Step 39.
NO : Repair the damaged parts.

16DB477A

C-15 HARNESS SIDE

CONNECTOR: C-15

C-15 (B)