Mitsubishi Galant 9G. Manual — part 1301

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-308

STEP 4. Check the CAN_L and H lines (communication
lines including the combination meter) between joint
connector (3) and the combination meter for a short
circuit. Measure the resistance at joint connector (3) C-02.

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 at the wiring harness side of joint connector (3)
C-02.

(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.

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

terminals 4 and 15.

OK: 120

± 20 Ω

Q: Does the resistance measure 120

± 20 Ω?

YES : If the resistance measures 120

± 20 Ω, go to Step 8.

NO : If the resistance does not measure 120

± 20 Ω> Go to

Step 5.

STEP 5. Check 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

.

Q: Is combination meter connector C-101 in good

condition?
YES : Go to Step 6.
NO : Repair the damaged parts.

AC305231AP

CONNECTOR: C-02

AC209438

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

TEST
HARNESS

AQ

TEST
HARNESS

HARNESS SIDE: C-02

AC305231AQ

CONNECTOR: C-101

HARNESS SIDE

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-309

STEP 6. Check the CAN_L and H lines (communication
lines only) between joint connector (3) and the
combination meter for a short circuit. Measure the
resistance at joint connector (3) C-02.

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 at the wiring
harness side of joint connector (3) C-02.

(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.

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

terminals 4 and 15.

OK: 1 k

Ω or more

CAUTION

Strictly observe the specified wiring harness repair proce-
dure. For details refer to

P.54C-5

.

Q: Does the resistance measure 1 k

Ω or more?

YES : If the resistance measures 1 k

Ω or more, go to Step 7

.

NO : If the resistance measures less than 1 k

Ω, repair the

wiring harness between joint connector (3) and the
combination meter connector.

AC305232

HARNESS SIDE

C-101

CONNECTORS: C-02, C-101

AE

C-02

C-02

C-101

AC209438

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

TEST
HARNESS

AQ

TEST
HARNESS

HARNESS SIDE: C-02

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-310

STEP 7. Check the combination meter for a short circuit.
Measure the resistance at combination meter connector
C-101.

CAUTION

A digital multimeter should be used. For details refer to

P.54C-4

.

(1) Disconnect combination meter C-101, and measure the

resistance at the component side of combination meter
connector C-101.

(2) Measure the resistance between combination meter

connector terminals 14 and 15.

OK: 120

± 20 Ω

Q: Does the resistance measure 120

± 20 Ω?

YES : If the resistance measures 120

± 20 Ω, diagnose CAN

bus lines thoroughly by referring to

P.54C-456

.

NO : If the resistance does not measure 120

± 20 Ω,

replace the combination meter.

AC305231AQ

CONNECTOR: C-101

HARNESS SIDE

AC204582BY

COMPONENT SIDE: C-101

G

11

22

17

3

14

G

12

1

13

2

15

4

16

5

18

7

6

19

8

10

21

20

9

TEST
HARNESS

TEST HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-311

STEP 8. Check the CAN_L and H lines (communication
lines including the ETACS-ECU) between joint connector
(3) and the ETACS-ECU for a short circuit. Measure the
resistance at joint connector (3) C-02.

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 at the wiring harness side of joint connector (3)
C-02.

(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.

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

terminals 5 and 16.

OK: 1 k

Ω or more

Q: Does the resistance measure 1 k

Ω or more?

YES : If the resistance measures 1 k

Ω or more, go to Step

12 .

NO : If the resistance measures less than 1 k

Ω, go to Step

9.

STEP 9. Check ETACS-ECU connector C-218 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 ETACS-ECU connector C-218 in good condition?

YES : Go to Step 10.
NO : Repair the damaged parts.

AC305231AP

CONNECTOR: C-02

AC209438

TEST
HARNESS

AR

TEST
HARNESS

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

HARNESS SIDE: C-02

AC305413

C-218 (GR)

CONNECTOR: C-218

AI

HARNESS SIDE

JUNCTION BLOCK
(REAR VIEW)

68

74

63

66

72

73

67

65 64

61

70

71

62

69

60

57

58

59

56 55

52

54 53

51