Mitsubishi Galant (2004+). Manual - part 479

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-527

(4) Measure the resistance between ABS-ECU connector 

terminal 23 and powertrain control module connector 

terminal 18.

OK: 2 ohms or less

(5) Measure the resistance between ABS-ECU connector 

terminal 24 and powertrain control module connector 

terminal 17.

OK: 2 ohms or less

CAUTION

Strictly observe the specified wiring harness repair proce-
dure. For details refer to 

P.54C-5

.

Q: Do all the resistances measure 2 ohms or less?

YES  : If all the resistances measure 2 ohms or less, go to 

Step 23.

NO  :  If either of the resistances measures more than 2 

ohms or all the resistances measure more than 2 
ohms, repair the wiring harness between ABS-ECU 
connector and the powertrain control module 
connector. 

AC204582

HARNESS SIDE: A-02

HARNESS SIDE: B-19

TEST 
HARNESS

TEST 
HARNESS

3

17

10

13

18

4

11

14

7

16 15

1

2

5

12

9

6

8

JAE

19

18

2

1

25

8

15

16

17

27

28

26

11

9

10

12

13

14

23

24

22 21

7

6

5

4

20

3

CU

AC204582

3

17

10

13

18

4

11

14

7

16 15

1

2

5

12

9

6

8

JAE

19

18

2

1

25

8

15

16

17

27

28

26

11

9

10

12

13

14

23

24

22 21

7

6

5

4

20

3

HARNESS SIDE: A-02

HARNESS SIDE: B-19

TEST 
HARNESS

TEST 
HARNESS

CT

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-528

STEP 23. Check the CAN bus lines inside the ABS-ECU. 

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, and measure the 

resistance at the component side of ABS-ECU connector 
A-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 ABS-ECU connector 

terminals 7 and 23.

OK: 2 ohms or less

(5) Measure the resistance between ABS-ECU connector 

terminals 24 and 25.

OK: 2 ohms or less

CAUTION

Strictly observe the specified wiring harness repair proce-
dure. For details refer to 

P.54C-5

.

Q: Do all the resistances measure 2 ohms or less?

YES  : If all the resistances measure 2 ohms or less, power 

supply to the powertrain control module may be 
suspected. Diagnose the engine. Refer to GROUP 
13A, MFI diagnosis 

P.13A-944

 <2.4L engine> or 

GROUP 13B, MFI diagnosis 

P.13B-968

 <3.8L 

engine>.

NO  :  If either of the resistances measures more than 2 

ohms or all the resistances measure more than 2 
ohms, replace the ABS-ECU.

AC305206

CONNECTOR: A-02

AG

A-02 (GR)

HARNESS SIDE

AC209438

COMPONENT SIDE: A-02

TEST 
HARNESS

AC

TEST 
HARNESS

AC209438

COMPONENT SIDE: A-02

AD

TEST 
HARNESS

TEST 
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-529

STEP 24. Using scan tool MB991958, diagnose the CAN 
bus line (Disconnect ABS-ECU connector A-02, and check 
the ABS-ECU system).

(1) Disconnect ABS-ECU connector A-02.
(2) Turn the ignition switch to the "ON" position.

(3) Diagnose CAN bus lines, and check if the MUT-III screen is 

as shown in the illustration.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Check ABS-ECU connector A-02.
Q: Does the MUT-III screen correspond to the illustration?

YES  : If the MUT-III screen corresponds to the illustration, 

go to Step 25 .

NO  :  If the MUT-III screen does not correspond to the 

illustration, refer to diagnostics item 8: Check the 
CAN_L and H lines for a short circuit (Refer to 

P.54C-340

).

AC305206

CONNECTOR: A-02

AG

A-02 (GR)

HARNESS SIDE

AC306074

: Red section on screen

PCM

METER

-ECU

ABS-ECU

AB

MUT

ETACS

-ECU

AC-ECU

SRS-ECU

J/C

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-530

STEP 25. Check the CAN bus lines between intermediate 
connector C-29 and the ABS-ECU. Measure the resistance 
between intermediate connector C-29 and 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 intermediate connector C-29 and ABS-ECU 

connector A-02, and measure the resistance between the 
wiring harness side connector of ABS-ECU connector A-02 
and the male side connector 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.

AC305206

CONNECTOR: A-02

AG

A-02 (GR)

HARNESS SIDE

AC305231AI

CONNECTOR: C-29