Mitsubishi Galant (2004+). Manual - part 459

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-447

STEP 8. Check the CAN bus lines (communication line 
only) between intermediate connector C-29 and the 
powertrain control module. Measure the resistance 
between intermediate connector C-29 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 intermediate connector C-29 and powertrain 

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

AC306248AD

B-19 (B)

CONNECTOR: B-19

PCM

AIR
CLEANER

HARNESS SIDE

AC305231AI

CONNECTOR: C-29

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-448

(4) Measure the resistance between intermediate connector 

terminal 11 and powertrain control module connector 

terminal 17.

OK: 2 ohms or less

(5) Measure the resistance between joint connector (3) 

terminal 12 and powertrain control module connector 

terminal 18.

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 the resistance measures 2 ohms or less, go to Step 

9.

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 joint 
connector (3) and the powertrain control module 
connector. 

AC204582

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

AC204582

TEST 
HARNESS

3

17

10

13

18

4

11

14

7

16 15

1

2

5

12

9

6

8

JAE

HARNESS SIDE: B-19

TEST 
HARNESS

CY

MALE SIDE: C-29

AC204582

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

AC204582

TEST 
HARNESS

HARNESS SIDE: B-19

TEST 
HARNESS

3

17

10

13

18

4

11

14

7

16 15

1

2

5

12

9

6

8

JAE

CX

MALE SIDE: C-29

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-449

STEP 9. Check the terminator resistor inside the 
powertrain control module. Measure the resistance at 

powertrain control module connector B-19.

CAUTION

A digital multimeter should be used. For details refer to 

P.54C-4

.

(1) Disconnect powertrain control module connector B-19, and 

measure the resistance at the component side of 
powertrain control module connector B-19.

(2) Measure the resistance between powertrain control module 

connector terminals 17 and 18.

OK: 120 

± 20 Ω

Q: Does the resistance measure 120 

± 20 Ω?

YES : If the resistance measures 120 

± 20 Ω, diagnose CAN 

bus lines thoroughly by referring to 

P.54C-571

<Vehicles without multi-center display 

(middle-grade type)> or 

P.54C-584

<Vehicles with 

multi-center display (middle-grade type)>.

NO :  If the resistance does not measure 120 

± 20 , replace 

the powertrain control module.

AC306248AD

B-19 (B)

CONNECTOR: B-19

PCM

AIR
CLEANER

HARNESS SIDE

AC209438

AC209438

AC209438

AC209438

COMPONENT SIDE: B-19

BD

TEST 
HARNESS

TEST 
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-450

DIAGNOSTIC ITEM 13: Diagnose a terminator resistor at either end <Vehicles with ABS>

CAUTION

When servicing a CAN bus line, ground yourself 
by touching a metal object such as an unpainted 
water pipe. If you fail to do so, a component con-
nected to the CAN bus line may be damaged.

POWERTRAIN
CONTROL MODULE

ABS-ECU

JOINT
CONNECTOR (3)

COMBINATION
METER