Mitsubishi Lancer Evolution IX. Manual - part 165

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-223

Step 6. Check the wiring harness from F-14 <LH 
drive vehicles>, F-08 <RH drive vehicles> rear 
fog lamp connector terminal No.4, C-01 <rear fog 
lamp indicator lamp> combination meter 
connector terminal No.21 to C-219 rear fog lamp 
relay connector terminal No.1.

AC310467

Harness side

AC

<LHD>

Connector: F-14

AC310469

Connector: F-08

Harness side

AC

<RHD>

AC310446

Connector: C-02
<LHD>

AK

Harness side

31

35

36

37

38

39

40

41

45

46

47

48

49

50

51

34

44

33

43

32

42

C-02 (L)

AC310456

Connector: C-02
<RHD>

AK

Harness side

31

35

36

37

38

39

40

41

45

46

47

48

49

50

51

34

44

33

43

32

42

C-02 (L)

AC310448

Junction block (front view)

Connector: C-219

AN

<LHD>

Junction block side

3

1

2
4

AC310458

Junction block (front view)

Connector: C-219

AK

<RHD>

Junction block side

3

1

2
4

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-224

NOTE: 

Prior to the wiring harness inspection, check interme-
diate connector C-127 <LH drive vehicles - rear fog 
lamp>, C-112 <RH drive vehicles - rear fog lamp> 
and junction block connector C-209, and repair if 
necessary.

• Check the output lines 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 rear fog lamp and the rear fog lamp 
indicator lamp illuminate normally.

Q: Is the check result normal?

The lamps illuminate normally at both high and low 
beams. : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00 

− How to 

Cope with Intermittent Malfunction 

P.00-5

).

The rear fog lamps do not illuminate. : 

Replace the 

rear fog lamp(s).

The rear fog lamp indicator lamp does not 
illuminate. : 

Replace the combination meter.

AC310446

Connector: C-127
<LHD>

AN

C-112(GR)

AC310456

Connector: C-112
<RHD>

AM

C-112(GR)

AC310448

Harness side

Junction block (front view)

Connector: C-209

AO

<LHD>

AC310458

Harness side

Junction block (front view)

Connector: C-209

AL

<RHD>

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-225

INTERIOR LAMP

INSPECTION PROCEDURE K-1: The front, rear room lamp and/or luggage compartment lamp do not 

illuminate or extinguish normally.

CAUTION

Whenever the ECU is replaced, ensure that the 
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

The ETACS-ECU operates this function in accord-
ance with the input signals below.

• Ignition switch (IG1)

• Key reminder switch

• All of the door switches

• Driver's door lock actuator

• Interior lamp loaded signal

If this function does not work normally, these input 
signal circuit(s), the interior lamp automatic shut-
down function or the ETACS-ECU may be defective. 
The delay-off setting of this function can be changed 
by the adjustment function (default setting; 15 sec-
onds).

POSSIBLE CAUSES

• Malfunction of the key reminder switch

• Malfunction of the door switches

• Malfunction of the driver's door lock actuator

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

J/B SIDE

ETACS-ECU

REAR
ROOM
LAMP

FRONT
ROOM
LAMP

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

LUGGAGE
COMPARTMENT
LAMP SWITCH

LUGGAGE
COMPARTMENT
LAMP

Room Lamp Circuit

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-226

DIAGNOSTIC PROCEDURE

Step 1. Check the adjustment function.
Check that the room lamp delay-off time has been 
set to other than "0 second" by the adjustment func-
tion.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Use the adjustment function to set the room 
lamp delay-off time to other than "0 second." 
Refer to 

P.54B-302

.

Step 2. Check the power supply circuit.
When the ignition switch is turned to the LOCK 
(OFF) position, check if the hazard warning lamps 
illuminate.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Refer to inspection procedure A-2 "Check 
the battery power supply circuit to the 
ETACS-ECU 

P.54B-42

."

Step 3. Pulse check
Check the input signals below, which are related to 
the front and rear room lamps.

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

Q: Is the check result normal?

All the signals are received normally. : 

Go to Step 

4.

The ignition switch (IG1) signal is not received. : 

Refer to inspection procedure L-2 "The 
ignition switch (IG1) signal is not received 

P.54B-242

."

All the door switch signals are not received. : 

Refer to inspection procedure L-10 "All the 
door switch signals are not received <LH 
drive vehicles>

P.54B-265

 ." Refer to 

inspection procedure L-10 "All the door 
switch signals are not received <RH drive 
vehicles>

P.54B-268

 ."

The driver's door lock actuator switch signal is not 
received. : 

Refer to inspection procedure L-11 

"The front door lock actuator (LH) switch 
signal is not received <LH drive 
vehicles>

P.54B-272

 ." Refer to inspection 

procedure L-11 "The front door lock actuator 
(RH) switch signal is not received <RH drive 
vehicles>

P.54B-275

 ."

Interior lamp loaded signal is not detected. : 

Refer 

to inspection procedure L-15 "Interior lamp 
loaded signal is not detected 

P.54B-287

."

Step 4. Determine a trouble spot.

Q: Which lamp does not illuminate?

No lamp illuminates. : 

Replace the ETACS-ECU.

The front room lamp or the rear room lamp does 
not illuminate. : 

Go to Step 5.

The luggage compartment lamp does not 
illuminate. : 

Go to Step 10.

System switch

Check condition

Ignition switch (IG1)

When turned from ACC 
to ON

All of the door switches

A door is opened when 
all the doors are closed

Driver's door lock 
actuator switch

When the driver's door is 
unlocked or locked

Interior lamp loaded 
signal

When a load is applied 
through multi-purpose 
fuse No.18