Mitsubishi Galant (2004+). Manual — part 456

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-435

STEP 14. Check the ABS-ECU for open circuit. Measure

the resistance at ABS-ECU connector A-02.

CAUTION

A digital multimeter should be used. For details refer to

P.54C-4

.

(1) Disconnect ABS-ECU connector A-02, and measure the

resistance at the component side of ABS-ECU connector
A-02.

(2) Measure the resistance between ABS-ECU connector

terminals 7 and 23.

OK: 2 ohms or less

(3) Measure the resistance between ABS-ECU connector

terminals 24 and 25.

OK: 2 ohms or less

Q: Do all the resistances measure 2 ohms or less?

YES : If all the resistances measure 2 ohms or less, go to

Step 8.

NO : If either of the resistances measures more than 2

ohms or all the resistances measure more than 2
ohms, replace the ABS-ECU.

AC305206

CONNECTOR: A-02

AG

A-02 (GR)

HARNESS SIDE

AC209438

COMPONENT SIDE: A-02

TEST
HARNESS

AC

TEST
HARNESS

AC209438

COMPONENT SIDE: A-02

AD

TEST
HARNESS

TEST
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-436

Step 15. Check the CAN bus lines (communication line
only) between joint connector (3) and the data link
connector. Measure the resistance at joint connector (3)

C-02 and data link connector C-125.

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 measure the

resistance between the wiring harness side connector of
joint connector (3) C-02 and wiring harness side connector
of data link connector C-125.

(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

C-125

CONNECTORS: C-02, C-125

AF

C-02

C-02

C-125 (B)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-437

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

terminal 18 and data link connector terminal 14.

OK: 2 ohms or less

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

terminal 7 and data link connector terminal 16.

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 <all the resistances measure 2 ohms or less: When
any repair done> : Retest the system.
YES <all the resistances measure 2 ohms or less: When
no repair done> : Diagnose CAN bus lines thoroughly by

referring to

P.54C-578

<Vehicles without multi-center

display (middle-grade type)> or

P.54C-591

<Vehicles

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

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 joint
connector (3) and the data link connector.

AC204582DI

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

TEST
HARNESS

HARNESS SIDE: C-02

TEST
HARNESS

Y

8

16

15

7

5

1314

6

12

4

2

1011

3

9

1

HARNESS SIDE: C-125

AC204582

HARNESS SIDE: C-02

TEST
HARNESS

DH

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

Y

8

16

15

7

5

1314

6

12

4

2

1011

3

9

1

TEST
HARNESS

HARNESS SIDE: C-125

CONTINUE

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-438

54C

DIAGNOSTIC ITEM 12: Diagnose a terminator resistor at either end <Vehicles without 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

JOINT
CONNECTOR (3)

COMBINATION
METER

AC306248AB

B-19 (B)

CONNECTOR: B-19

AIR
CLEANER

PCM

AC305231CA

C-101

C-29

C-02

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