Mitsubishi Galant (2004+). Manual — part 502

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-619

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-620

(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-266

.

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-621

CAN COMMUNICATION SIGNAL TABLE

M1548300400059

SIGNAL

TRANSMITTER
ECU

RECEIVER ECU

POWER TRAIN
CONTROL
MODULE

ABS-ECU

MULTI-CENTE
R DISPLAY
UNIT (MIDDLE-
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

×

−

−

−

−

−

CAN COMMUNICATION SIGNAL TABLE

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-622

Communication
continuation request
signal

A/C-ECU

−

−

−

−

−

×

Compressor signal

×

−

−

−

−

−

Idle-up request signal

×

−

−

−

−

−

Cooling fan request
signal

×

−

−

−

−

−

Cooling fan signal

×

−

−

−

−

−

Set temperature signal

−

−

×

−

−

−

Ambient temperature
signal

−

−

×

−

−

−

Fan air volume signal

−

−

×

−

−

−

Air outlet mode signal

−

−

×

−

−

−

Communication
standby signal

ETACS-E
CU

−

−

−

×

−

−

Ignition switch (ACC)
signal

−

−

−

−

−

−

Ignition switch (IG1)
signal

−

−

−

×

−

−

High-beam indicator
request signal

−

−

−

×

−

−

Turn-signal indicator
request signal

−

−

−

×

−

−

Fog light indicator
request signal

−

−

−

×

−

−

Illumination signal

−

−

−

×

−

−

Door "open" signals

−

−

−

×

−

−

Interior light shut-off
signal

−

−

−

×

−

−

Customize signal

−

−

×

−

−

−

SIGNAL

TRANSMITTER
ECU

RECEIVER ECU

POWER TRAIN
CONTROL
MODULE

ABS-ECU

MULTI-CENTE
R DISPLAY
UNIT (MIDDLE-
GRADE TYPE)

COMBINATION
METER

A/C-ECU

ETACS-ECU