Mitsubishi Galant 9G. Manual — part 1282

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-232

STEP 25. Check the CAN_H line (communication line only)
between the powertrain control module connector and
ABS-ECU connector for short to ground. Measure the
resistance at powertrain control module 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 powertrain control module connector B-19 and

ABS-ECU connector A-02, and measure the resistance at
the harness side of powertrain control module 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.

AC305206

CONNECTOR: A-02

AG

A-02 (GR)

HARNESS SIDE

AC306248AD

B-19 (B)

CONNECTOR: B-19

PCM

AIR
CLEANER

HARNESS SIDE

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-233

(4) Measure the resistance between powertrain control module

connector terminal 17 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

26 .

NO : If the resistance measures less than 1 k

Ω, repair the

wiring harness between powertrain control module
connector and ABS-ECU connector.

STEP 26. 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.

AC209364

HARNESS SIDE: B-19

TEST
HARNESS

AC209364IE

AC305206

CONNECTOR: A-02

AG

A-02 (GR)

HARNESS SIDE

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-234

(2) Connect special tool MB991970 (ABS check harness) to

the ABS-ECU and the wiring harness, and measure the
resistance at special tool MB991970 (ABS check harness).

(3) Turn the ignition switch to the "LOCK" (OFF) position.

CAUTION

Disconnect the negative battery terminal. For details refer
to

P.54C-4

.

(4) Disconnect the negative battery terminal.
(5) Measure the resistance between special tool MB991970

(ABS check harness) connector terminal 25 and body
ground.

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-486

.

NO : If the resistance measures less than 1 k

Ω, replace the

ABS-ECU.

STEP 27. Check intermediate connector C-29 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 intermediate connector C-29 in good condition?

YES : Go to Step 28.
NO : Repair the damaged parts.

AC209767

SPECIAL TOOL
MB991970

ABS-
ECU

SPECIAL TOOL MB991970
CONNECTOR

AE

2

19

1

18

25

8

15

16

17

27

28

26

11

9

10

12

13

14

23

24

22 21

7

6

5

4

20

3

MEASUREMENT CONNECTOR

AC305231AI

CONNECTOR: C-29

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-235

STEP 28. Check the CAN_L-side bus line (communication
line including ECUs) of the front wiring harness 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

.

(1) Disconnect intermediate connector C-29, and measure the

resistance at the male side (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 12 and body ground.

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

29 .

NO : If the resistance measures less than 1 k

Ω, go to Step

46.

AC305231AI

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

MALE SIDE: C-29

TEST HARNESS

GA