Mitsubishi Galant (2004+). Manual — part 451

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-415

(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 6.

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-571

<Vehicles without multi-center

display (middle-grade type)> or

P.54C-584

<Vehicles

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

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

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-416

DIAGNOSTIC ITEM 11: Diagnose terminator resistors at both ends <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

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-417

.

TROUBLE JUDGMENT
The terminator resistors at both ends of CAN bus
lines may be damaged, when the resistance
between the CAN bus lines (CAN_L and H lines) is
more than 2 ohms.

.

COMMENTS ON TROUBLE SYMPTOM
The CAN bus line harness wires or connectors may
be damaged (open circuit may be present on CAN_L
or CAN_H line between the data link connector and
CAN main bus lines, or CAN main bus lines may be
open at both sides), or the combination meter and
the powertrain control 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 combination meter may be defective

• The ABS-ECU may be defective

• The powertrain control module may be defective

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991970: ABS Check Harness

AC305206

CONNECTOR: A-02

AR

A-02 (GR)

AC306248AB

B-19 (B)

CONNECTOR: B-19

AIR
CLEANER

PCM

AC305231CA

C-101

C-29

C-02

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

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-418

STEP 1. Check intermediate connector C-29 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

.

Q: Is intermediate connector C-29 in good condition?

YES : Go to Step 2.
NO : Repair the damaged parts.

AC305231AI

CONNECTOR: C-29