Mitsubishi 380. Manual — part 686

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-154

STEP 20. Check ABS-ECU connector A-02 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 ABS-ECU connector A-02 in good condition?

YES : Go to Step 21.
NO : Repair the damaged parts.

STEP 21. Check the CAN_H line (communication line only)
between intermediate connector C-29 and ABS-ECU
connector for short to ground. Measure the resistance at
intermediate connector C-29.

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

.

16DB402A

A-02 (GR)

CONNECTOR: A-02

A-02 HARNESS CONNECTOR:

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-155

(1) Disconnect intermediate connector C-29 and ABS-ECU

connector A-02, and measure the resistance at the male
side of intermediate connector C-29 (at front wiring harness
side).

(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 intermediate connector

terminal 11 and body ground.

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

22 .

NO : If the resistance measures less than 1 k

Ω, repair the

wiring harness between intermediate connector C-29
and ABS-ECU connector.

16DB402A

A-02 (GR)

CONNECTOR: A-02

A-02 HARNESS CONNECTOR:

52DB014A

CONNECTOR: C-29

AC209364

2 3

27

32

28

33

16

15

4 5

19

18

29

17

34

7 8

35

22

21

9 10

30

36

31

37

25

24

23

6

20

1

14

26

11

13

12

38

AC209364

MALE SIDE: C-29

TEST
HARNESS

HV

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-156

STEP 22. Check the CAN_H line (communication line only)
between the A/T- ECU connector and ABS-ECU connector
for short to ground. Measure the resistance at A/T- ECU
connector B-19.

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 A/T- ECU connector B-19 and ABS-ECU

connector A-02, and measure the resistance at the harness
side of A/T- ECU connector B-19.

(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.

NOTE: When diagnosing CAN BUS on vehicles with
manual transmission (M/T) disregard A/T-ECU and it’s
wiring circuits and measure between ABS-ECU and
ENGINE-ECU only.

16DB402A

A-02 (GR)

CONNECTOR: A-02

A-02 HARNESS CONNECTOR:

16DB480A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

A/T

CONTROL

UNIT

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-157

(4) Measure the resistance between A/T- ECU connector

terminal 13 and body ground.

OK: 1 k

Ω or more

NOTE: When diagnosing CAN BUS on vehicles with
manual transmission (M/T) disregard A/T-ECU and it’s
wiring circuits and measure between ABS-ECU and
ENGINE-ECU only.

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 A/T- ECU connector and
ABS-ECU connector.

STEP 23. Check the CAN_H line inside the ABS-ECU for
short to ground. Measure the resistance at ABS-ECU
connector A-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 ABS-ECU connector A-02.

16DB491A

B-19

TEST
HARNESS

16DB402A

A-02 (GR)

CONNECTOR: A-02

A-02 HARNESS CONNECTOR: