Mitsubishi Galant 9G. Manual — part 1364

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-560

STEP 4. 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

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CONTROLLER AREA NETWORK (CAN)

54C-561

(4) Measure the resistance between intermediate connector

terminal 12 and joint connector (3) terminal 20.

OK: 2 ohms or less

(5) Measure the resistance between intermediate connector

terminal 11 and joint connector (3) terminal 9.

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 wires between
intermediate connector C-29 and joint connector (3).

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

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CONTROLLER AREA NETWORK (CAN)

54C-562

DIAGNOSTIC ITEM 18: Diagnose the lines between CAN main bus line and the powertrain control
module <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

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-563

.

TROUBLE JUDGMENT

If the MUT-III cannot received signals from the pow-
ertrain control module, CAN bus line connector(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

AC305206

CONNECTOR: A-02

AR

A-02 (GR)

AC306248AB

B-19 (B)

CONNECTOR: B-19

AIR
CLEANER

PCM