Mitsubishi Galant (2004+). Manual - part 497

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-599

STEP 2. Check the CAN bus lines between joint connector 
(3) and the multi-center display unit (middle-grade type). 
Measure the resistance between joint connector (3) C-02 
and multi-center display unit (middle-grade type) 

connector C-05.

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 multi-center display 

unit (middle-grade type) connector C-05, and measure the 
resistance at the wiring harness sides of joint connector (3) 
C-02 and multi-center display unit (middle-grade type) 
connector C-05.

(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.

AC305231AP

CONNECTOR: C-02

AC305233 AF

CONNECTOR: C-05

HARNESS SIDE

C-05 (B)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-600

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

terminal 8 and multi-center display unit (middle-grade type) 

connector terminal 13.

OK: 2 ohms or less

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

terminal 19 and multi-center display unit (middle-grade 

type) connector terminal 12.

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 multi-center display (middle-grade type) 
may be suspected. Diagnose the multi-center display 
(middle-grade type). Refer to GROUP 54A, 

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 multi-center display unit 
(middle-grade type) connector. 

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

8

2

10 9

1

5

3

4

6

7

20191817161514131211

TEST 
HARNESS

HARNESS SIDE: C-05

CJ

AC204582

HARNESS SIDE: C-02

CK

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

8

2

10 9

1

5

3

4

6

7

20191817161514131211

HARNESS SIDE: C-05

TEST 
HARNESS

TEST 
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-601

DIAGNOSTIC ITEM 22: Diagnose the lines between CAN main bus line and the A/C-ECU.

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.

JOINT
CONNECTOR (3)

COMBINATION
METER

A/C-ECU

POWERTRAIN
CONTROL MODULE

<WITHOUT ELECTRONIC BRAKE-FORCE DISTRIBUTION (EBD)
 AND ANTI-LOCK BRAKING SYSTEM (ABS)>

NOTE 

:MANUAL AIR CONDITIONING SYSTEM <LOW>
:MANUAL AIR CONDITIONING SYSTEM <MIDDLE>
 OR AUTOMATIC AIR CONDITIONING SYSTEM

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-602

.

A/C-ECU

A/C-ECU

JOINT
CONNECTOR (3)

COMBINATION
METER

A/C-ECU

A/C-ECU

A/C-ECU

POWERTRAIN
CONTROL MODULE

<WITH ELECTRONIC BRAKE-FORCE DISTRIBUTION (EBD)
 AND ANTI-LOCK BRAKING SYSTEM (ABS)>

:MANUAL AIR CONDITIONING SYSTEM <LOW>
:MANUAL AIR CONDITIONING SYSTEM <MIDDLE>
 OR AUTOMATIC AIR CONDITIONING SYSTEM

NOTE 

ABS-ECU

AC305231BD

CONNECTOR: C-02

AC305233 AK

C-10 (B)

C-15 (B)

CONNECTORS: C-10, C-15