Mitsubishi 380. Manual - part 658

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-43

STEP 11. Check the CAN_H 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 5 

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

AC209365

HARNESS SIDE: C-02

TEST HARNESS

FR

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-44

STEP 12. Check the CAN_H 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 6 

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 15.
NO :  If the voltage measures more than 4.0 V, go to Step 

13.

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

AC209365

HARNESS SIDE: C-02

FS

TEST HARNESS

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-45

STEP 13. Check A/C-ECU connector  C-15  automatic air 
conditioning system  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 A/C-ECU connector  C-15 automatic air conditioning 

system in good condition?
YES : Go to Step 14.
NO :  Repair the damaged parts.

16DB477A

C-15 HARNESS SIDE

CONNECTOR:  C-15

C-15 (B)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-46

STEP 14. Check the CAN_H line (communication line only) 
between joint connector (3) and 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 A/C-ECU 

connector C-15  automatic air conditioning system, and 
measure the voltage at the wiring harness side of joint 
connector (3) C-02.

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

16DB408A

CONNECTOR: C-02

16DB477A

C-15 HARNESS SIDE

CONNECTOR:  C-15

C-15 (B)