Mitsubishi Galant 9G. Manual — part 1355

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-524

STEP 3. 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 4.
NO : Repair the damaged parts.

STEP 4. Using scan tool MB991958, diagnose the CAN bus
line (Disconnect intermediate connector C-29, and then
determine that a failure is present at either the front wiring
harness side or the instrument panel wiring harness side).
(1) Disconnect intermediate connector C-29.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.

(2) Connect scan tool MB991958 to the data link connector.
(3) Turn the ignition switch to the "ON" position.

AC305231AI

CONNECTOR: C-29

AC305231AI

CONNECTOR: C-29

AC206894

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-525

(4) Diagnose CAN bus lines, and check if the MUT-III screen is

as shown in the illustration.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
(6) Connect intermediate connector C-29.
Q: Does the MUT-III screen correspond to the illustration?

YES : If the MUT-III screen corresponds to the illustration,

go to Step 23 .

NO : If the MUT-III screen does not correspond to the

illustration, go to Step 5.

STEP 5. 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: Is joint connector (3) C-02 in good condition?

YES : Go to Step 6.
NO : Repair the damaged parts. Replace the joint

connector as necessary.

AC306075

: Red section on screen

AB

PCM

METER

-ECU

ETACS

-ECU

AC-ECU

SRS-ECU

C.DISPLAY

MUT

J/C

ABS-ECU

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-526

STEP 6. Using scan tool MB991958, diagnose the CAN bus
line (Disconnect combination meter connector C-101, and
check the combination meter system).
(1) Disconnect combination meter connector C-101.
(2) Turn the ignition switch to the "ON" position.

(3) Diagnose CAN bus lines, and check if the MUT-III screen is

as shown in the illustration.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect combination meter connector C-101.
Q: Does the MUT-III screen correspond to the illustration?

YES : If the MUT-III screen corresponds to the illustration,

go to Step 7 .

NO : If the MUT-III screen does not correspond to the

illustration, go to Step 8.

AC305231AQ

CONNECTOR: C-101

HARNESS SIDE

AC306075

: Red section on screen

AC

PCM

METER

-ECU

ETACS

-ECU

AC-ECU

SRS-ECU

C.DISPLAY

MUT

J/C

ABS-ECU

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-527

STEP 7. 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