Mitsubishi Lancer Evolution IX. Manual - part 175

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-263

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>

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

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-264

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. Retest the system.
Check that the hazard warning lamp switch signal is 
received normally.

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

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-265

INSPECTION PROCEDURE L-10: 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

DIAGNOSTIC PROCEDURE

Step 1. Pulse check
Check the input signal from the door switch (front: 
LH).

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

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>

System switch

Check condition

door switch (front: LH)

When the driver's door is 
opened

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-266

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 

P.54B-244

."

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.

Step 5. Check the wiring harness from terminal 
No.2 of the D-18 <front: LH>, D-01 <front: RH>, 
D-08 <rear: RH> or D-11 <rear: LH> door switch 
connector to terminal No.7 of the C-226 
ETACS-ECU connector.

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

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