Mitsubishi Galant (2004+). Manual - part 492

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-579

.

TROUBLE JUDGMENT
If the MUT-III cannot received signals from the 
powertrain control module, CAN bus line connec-
tor(s) are broken or an open circuit has occurred.

.

COMMENTS ON TROUBLE SYMPTOM
The wiring harness wire or connectors may have 
loose, corroded, or damage terminals, or terminals 
pushed back in the connector, or the powertrain con-
trol module may be defective.

.

TROUBLESHOOTING HINTS

• The wiring harness or connectors may have 

loose, corroded, or damage terminals, or termi-
nals pushed back in the connector

• The powertrain control module may be defective

• The ABS-ECU may be defective

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991970: ABS Check Harness

AC305206

CONNECTOR: A-02

AR

A-02 (GR)

AC306248AB

B-19 (B)

CONNECTOR: B-19

AIR
CLEANER

PCM

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-580

STEP 1. Check ABS-ECU connector A-02 and powertrain 
control module connector B-19 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: Are ABS-ECU connector A-02 and powertrain control 

module connector B-19 in good condition? 
YES : Go to Step 2.
NO :  Repair the damaged parts.

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-581

STEP 2. Check the CAN bus lines between the ABS-ECU 
and the powertrain control module. Measure the resistance 
between ABS-ECU connector A-02 and 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 ABS-ECU connector A-02 and powertrain 

control module connector B-19, and measure the resistance 
between each wiring harness side connector.

(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-582

(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 3.

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