Mitsubishi Galant 9G. Manual - part 1345

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-484

STEP 23. Check the CAN bus lines between intermediate 
connector C-29 and the joint connector (3). Measure the 
resistance between intermediate connector C-29 and joint 
connector (3) C-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 joint connector (3) C-02 and intermediate 

connector C-29, and measure the resistance between the 
wiring harness side connector of joint connector (3) C-02 
and the female side connector of intermediate connector 
C-29 (instrument panel 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.

AC305232

CONNECTORS: C-02, C-29

AG

C-02

C-02

C-29

C-29

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-485

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

terminal 20 and intermediate connector terminal 12.

OK: 2 ohms or less

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

terminal 9 and intermediate connector C-29 terminal 11.

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-970

 <2.4L engine> or 

GROUP 13B, MFI diagnosis 

P.13B-1016

 <3.8L 

engine>.

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 intermediate connector. 

AC204582

35

34

36

30

38

29

17

13 12 11

37

31

33 32

26

27

28

16

14

15

3 2

4

18

6

7

21 20

5

19

9

10

24 23

25

8

22

1

TEST 
HARNESS

FEMALE SIDE: C-29

HARNESS SIDE: C-02

TEST 
HARNESS

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

CR

AC204582

35

34

36

30

38

29

17

13 12 11

37

31

33 32

26

27

28

16

14

15

3 2

4

18

6

7

21 20

5

19

9

10

24 23

25

8

22

1

TEST 
HARNESS

FEMALE SIDE: C-29

HARNESS SIDE: C-02

TEST 
HARNESS

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

CQ

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-486

DIAGNOSTIC ITEM 15: Diagnose CAN bus lines thoroughly <Vehicles with ABS and vehicles without 
multi-center display (middle-grade type)>

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.

DATA LINK
CONNECTOR

ETACS-ECU

POWERTRAIN
CONTROL MODULE

JOINT
CONNECTOR (3)

COMBINATION
METER

A/C-ECU

SRS-ECU

NOTE

: MANUAL AIR CONDITIONING SYSTEM <LOW>
: MANUAL AIR CONDITIONING SYSTEM<MIDDLE>
  OR AUTOMATIC AIR CONDITIONING SYSTEM

ABS-ECU

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-487

.

TROUBLE JUDGMENT

If the MUT-III cannot received signals from ECUs, 
CAN bus line connector(s) are broken or an open cir-
cuit 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 a ECU 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 ETACS-ECU may be defective

• The combination meter may be defective

• The A/C-ECU may be defective

• The SRS-ECU may be defective

• The ABS-ECU may be defective

• The powertrain control module may be defective

AC305206

CONNECTOR: A-02

AR

A-02 (GR)

AC306248AB

B-19 (B)

CONNECTOR: B-19

AIR
CLEANER

PCM

AC305231BZ

C-101

C-125 (B)

C-29

C-02

CONNECTORS: C-02, C-29, C-101, C-125

AC305233 AU

CONNECTORS: C-10, C-15, C-22, C-121

C-121 (Y)

C-22 (Y)

C-10 (B)

C-15 (B)

AC305413

C-218 (GR)

CONNECTOR: C-218

AJ

JUNCTION BLOCK
(REAR VIEW)