Mitsubishi Galant 9G. Manual — part 1375

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-604

TROUBLE JUDGMENT

If the MUT-III cannot received signals from the com-
bination meter, CAN bus line connector(s) are bro-
ken 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 combination
meter 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 combination meter may be defective

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check joint connector (3) C-02 and combination
meter connector C-101 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

.

Check the joint connector at the wiring harness side for loose,
corroded or damaged terminals, or terminals pushed back in
the connector, and also check the short pin behind the connec-
tor for corrosion, deformation and delamination.
Q: Are joint connector (3) C-02 and combination meter

connector C-101 in good condition?
YES : Go to Step 2.
NO : Repair the damaged parts. Replace the joint

connector as necessary.

AC305232

HARNESS SIDE

C-101

CONNECTORS: C-02, C-101

AE

C-02

C-02

C-101

AC209350

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

AB

SHORT PIN

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-605

STEP 2. Check the CAN bus lines between joint connector
(3) and the combination meter. Measure the resistance
between joint connector (3) C-02 and combination meter
connector C-101.

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 combination meter

connector C-101, 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.

AC305232

HARNESS SIDE

C-101

CONNECTORS: C-02, C-101

AE

C-02

C-02

C-101

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-606

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

terminal 15 and combination meter connector terminal 15.

OK: 2 ohms or less

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

terminal 4 and combination meter connector terminal 14.

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 combination meter may be suspected.
Diagnose the combination meter. Refer to GROUP
54A, Combination meter assembly

P.54A-252

.

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 combination meter connector.

AC204582

HARNESS SIDE: C-02

BZ

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

G

G

22

11

5

16

19

20

21

17

18

8

10 9

7 6

13

1514

12

2

4 3

1

TEST
HARNESS

HARNESS SIDE: C-101

TEST
HARNESS

AC204582

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

G

G

22

11

5

16

19

20

21

17

18

8

10 9

7 6

13

1514

12

2

4 3

1

TEST
HARNESS

HARNESS SIDE: C-101

CA

CAN COMMUNICATION SIGNAL TABLE

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-607

CAN COMMUNICATION SIGNAL TABLE

M1548300400059

SIGNAL

TRANSMITTER
ECU

RECEIVER
ECU

POWER TRAIN
CONTROL
MODULE

A BS-ECU

MULTI-CENTER
DISPLAY UNIT
(MID DLE-
GRADE TYPE)

COMBINATION
METER

A/C-ECU

ETACS-ECU

Engine speed signal

Power
train
control
module

−

×

−

×

×

−

A/C information signal

−

−

−

−

×

−

Vehicle speed signal

−

−

−

×

×

−

Vehicle stop signal

−

−

×

×

×

×

Malfunction indicator
lamp request signal

−

−

−

×

−

−

Auto-cruise control
indicator lamp signal

−

−

−

×

−

−

Engine coolant
temperature signal

−

−

−

×

×

−

Selector position signal

−

×

−

×

×

×

ABS warning light
request signal

ABS-ECU −

−

−

×

−

−

SRS warning light
request signal

SRS-ECU −

−

−

×

−

−

Communication
continuation request
signal

Multi-cent
er display
unit
(middle-gr
ade type)

−

−

−

−

×

×

Ignition switch (ACC)
signal

−

−

−

−

×

×

Adjustment request
signal

−

−

−

−

×

×

Customize signal

−

−

−

−

×

×

Tone alarm sound
signal

−

−

−

−

×

×

Communication
continuation request
signal

Combinati
on meter

−

−

−

−

−

×

Vehicle speed signal

−

−

−

−

−

×

Ignition switch (IG1)
signal

−

−

−

−

−

×

Seat belt signal

−

−

−

−

−

×

Fuel information signal

×

−

−

−

−

−