Mitsubishi Lancer Evolution IX. Manual - part 257

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-287

Step 4. Check the wiring harness between C-03 
hazard warning lamp switch connector terminal 
No.2 and the body earth.

NOTE: 

Prior to the wiring harness inspection, check joint 
connector C-06, and repair if necessary.

• Check the earth wires for open circuit.

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 5. Connector check: C-228 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

AC310446

Connector: C-03
<LHD>

AG

Harness side

AC310454

Connector: C-03
<RHD>

AG

Harness side

AC310452

AE

C-06 (GR)

Connector: C-06 <LHD>

AC310456

Connector: C-06 <RHD>

AB

C-06 (GR)

AC310450

Connector: C-228

AH

Junction block 
(rear view)

Harness side

<LHD>

51

52

53

54

55

56

57

58

59

58 5756 55 54 53 52 51 60

74 7372

71 70 69

AC310461

Harness side

Junction block (rear view)

Connector: C-228

AG

<RHD>

51

52

53

54

55

56

57

58

59

58 5756 55 54 53 52 51 60

74 7372

71 70 69

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-288

Step 6. Check the wiring harness between C-228 
ETACS-ECU connector terminal No.55 and C-03 
hazard warning lamp switch connector terminal 
No.1.

• Check the input line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

Step 7. Pulse check
Check the input signal from the hazard warning lamp 
switch.

OK: The M.U.T.-II/III sounds or the voltmeter 
needle fluctuates.

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-03
<LHD>

AG

Harness side

AC310454

Connector: C-03
<RHD>

AG

Harness side

AC310450

Connector: C-228

AH

Junction block 
(rear view)

Harness side

<LHD>

51

52

53

54

55

56

57

58

59

58 5756 55 54 53 52 51 60

74 7372

71 70 69

AC310461

Harness side

Junction block (rear view)

Connector: C-228

AG

<RHD>

51

52

53

54

55

56

57

58

59

58 5756 55 54 53 52 51 60

74 7372

71 70 69

System switch

Check condition

Hazard warning lamp 
switch

When the hazard 
warning lamp switch is 
turned from off to on

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-289

INSPECTION PROCEDURE L-11: All the door switch signals are not received. <LH drive vehicles>

CAUTION

Whenever the ECU is replaced, ensure that the 
input signal circuit is normal.

COMMENTS ON TROUBLE SYMPTOM

Input signals from all the door switches are used to 
operate the functions below. If the signal(s) are 
abnormal, these functions will not work normally.

• Keyless entry system

• Room lamps

POSSIBLE CAUSES

• Malfunction of the door switches

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

ETACS-ECU

DOOR
SWITCH
(FRONT: RH)

DOOR
SWITCH
(REAR: RH)

DOOR
SWITCH
(REAR: LH)

DOOR
SWITCH
(FRONT: LH)

J/B SIDE

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

All Door Switches Input Circuit <LHD>

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-290

DIAGNOSIS PROCEDURE

Step 1. SWS monitor data list.

<Selected item> ETACS ECU

• Driver's door is open

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Refer to Inspection Procedure L-3 "The door 
switch (front: LH) signal is not received <LH 
drive vehicles>

P.54C-263

 ."

Step 2. Connector check: D-18 <front: LH>, D-01 
<front: RH>, D-08 <rear: RH> or D-11 <rear: LH> 
door switch connectors, and C-226 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the defective connector.

Step 3. Check the installation condition.
Check that the door switch is installed on the body 
correctly.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Correct the installation condition.

Step 4. Check the door switch.
Refer to GROUP 42 

− Door 

P.42-27

.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the door switch.

Item No.

Item name

Normal condition

Item 32

DR DOOR SW

ON

AC310450

Connector: C-226

AB

Junction block side

Junction block (rear view)

<LHD>

AC310463

<LHD>

AC

Harness side

Harness side

D-01

D-08

D-01

Connectors: D-01, D-08

D-08

AC310465

Harness side

D-11

D-11

AD

Connectors: D-11, D-18
<LHD>

Harness side

D-18

D-18