Mitsubishi Galant (2004+). Manual — part 466

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-475

STEP 8. 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 9.
NO : Repair the damaged parts.

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

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-476

STEP 9. Using scan tool MB991958, diagnose the CAN bus
line (Disconnect ETACS-ECU connector C-218, and check
the ETACS-ECU system).

(1) Disconnect ETACS-ECU connector C-218.
(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) Connect ETACS-ECU connector C-218.
Q: Does the MUT-III screen correspond to the illustration?

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

go to Step 10 .

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

illustration, go to Step 11.

AC206894

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

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

AC306073

: Red section on screen

AD

MUT

ETACS

-ECU

AC-ECU

SRS-ECU

J/C

METER

-ECU

PCM

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-477

STEP 10. Check the CAN bus lines between joint
connector (3) and the ETACS-ECU. Measure the resistance
between joint connector (3) C-02 and ETACS-ECU

connector C-218.

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 ETACS-ECU

connector C-218, and measure the resistances at the wiring
harness sides of joint connector (3) C-02 and ETACS-ECU
connector C-218.

(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

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

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-478

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

terminal 16 and ETACS-ECU connector terminal 73.

OK: 2 ohms or less

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

terminal 5 and ETACS-ECU connector terminal 72.

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 ETACS-ECU may be suspected.
Diagnose the ETACS-ECU by referring to GROUP
54B, Diagnosis

P.54B-79

.

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 ETACS-ECU connector.

AC204582

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

51

53

54

52

55

56

595857

60

69

62

71 70

61

64

65

67

7372

66

63

74

68

TEST
HARNESS

CL

HARNESS SIDE: C-02

HARNESS SIDE: C-218

TEST
HARNESS

AC204582

11

22

10

21

9

20

8

19

7

18

6

17

5

16

4

15

3

14

2

13

1

12

51

53

54

52

55

56

595857

60

69

62

71 70

61

64

65

67

7372

66

63

74

68

TEST
HARNESS

CN

TEST
HARNESS

HARNESS SIDE: C-02

HARNESS SIDE: C-218