Mitsubishi Lancer Evolution IX. Manual - part 195

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-39

Step 4. Resistance measurement at the C-226 
ETACS-ECU connector

(1) Remove the ETACS-ECU, and measure at the 

junction block side.

(2) Resistance between C-226 ETACS-ECU 

connector terminal No.3 and body earth

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Go to Step 5.

Step 5. Check the wiring harness between C-226 
ETACS-ECU connector terminal No.3 and body 
earth.

NOTE: 

Prior to the wiring harness inspection, check junction 
block connector C-214, and repair if necessary.

• Check the earth wires for open circuit.

AC310450

Connector: C-226 <LHD>

AB

Junction block side

Junction block (rear view)

AC310461

Connector: C-226 <RHD>

AE

Junction block side

Junction block 
(rear view)

AC310506AC

Connector C-226 
(Junction block side)

2019

7

13

17

18

1615 14

10

11

12

9 8

2

6 5

3

4

1

AC310450

Connector: C-226 <LHD>

AB

Junction block side

Junction block (rear view)

AC310461

Connector: C-226 <RHD>

AE

Junction block side

Junction block 
(rear view)

AC310448

Harness side

Junction block (front view)

Connector: C-214 <LHD>

AE

21

7

16 15

17

18

20 19

1

2

3

4

5

6

23 22

24

25

28

26

27

9

8

10

11

14

12

13

AC310458

Harness side

Junction block (front view)

Connector: C-214 <RHD>

AE

21

7

16 15

17

18

20 19

1

2

3

4

5

6

23 22

24

25

28

26

27

9

8

10

11

14

12

13

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-40

Q: Is the check result normal?

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00 

− How to 

Cope with Intermittent Malfunction 

P.00-5

).

NO : 

Repair the wiring harness.

Step 6. Connector check: C-228 ETACS-ECU 
connector and C-206 column switch connector

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the defective connector.

Step 7. Check the wiring harness from C-228 
ETACS-ECU connector terminal Nos.59 and 68 to 
C-206 column switch connector terminal Nos.3 
and 2.

AC310479

AD

Connector: C-206 <LHD>

Harness side

AC310481AD

Connector: C-206 <RHD>

Harness side

AC310450

Connector: C-228 <LHD>

AC

Junction block (rear view)

C-228 (GR)

Harness side

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

AC310461

Junction block (rear view)

Connector: C-228 <RHD>

AC

Harness side

C-228 (GR)

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

AC310479

AD

Connector: C-206 <LHD>

Harness side

AC310481AD

Connector: C-206 <RHD>

Harness side

AC310450

Connector: C-228 <LHD>

AC

Junction block (rear view)

C-228 (GR)

Harness side

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

AC310461

Junction block (rear view)

Connector: C-228 <RHD>

AC

Harness side

C-228 (GR)

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-41

NOTE: 

Prior to the wiring harness inspection, check joint 
connector C-101, and repair if necessary.

• Check the communication lines for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the wiring harness.

Step 8. ECU check by using the SWS monitor.

• Ignition switch: OFF

ECUS TO BE CHECKED

• ETACS ECU

OK: "OK" is displayed on the "ETACS ECU" 
menu.

Q: Is the check result normal?

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00 

− How to 

Cope with Intermittent Malfunction 

P.00-5

).

NO : 

Replace the ETACS-ECU.

AC310446

Connector: C-101 <LHD>

AW

C-101 (L)

AC310456

Connector: C-101 <RHD>

AQ

C-101 (L)

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-42

INSPECTION PROCEDURE A-4: Communication with the front-ECU is not possible.

CAUTION

Whenever the ECU is replaced, ensure that the 

power supply circuit, the earthing circuit and the 

communication circuit are normal.

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Gray     R : Red     P : Pink     V : Violet

IGNITION
SWITCH (IG2)

ETACS-ECU

POWER
SOURCE

FRONT-ECU

BATTERY

RELAY
BOX

NOTE

: LHD
: RHD

Front-ECU Power Supply and SWS Communication Circuit