Mitsubishi Lancer Evolution IX. Manual - part 162

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-211

NOTE: 

Prior to the wiring harness inspection, check interme-
diate connector C-129 <front or side LH>, C-127 
<rear LH> or C-111 <side RH> and junction block 
connector C-210 <front, side or rear LH>, C-217 
<rear RH> or C-214 <turn-signal indicator lamp>, 
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 turn-signal lamps and the indicator 
lamps 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 front turn-signal lamps do not illuminate. : 

Replace the socket.

The side turn-signal lamps do not illuminate. : 

Replace the socket.

The rear turn-signal lamps do not illuminate. : 

Replace the socket assembly.

The turn-signal indicator lamps do not illuminate. : 

Replace the combination meter.

AC310461

Junction block (rear view)

Connector: C-226

AB

<RHD>

Junction block side

AC310455

C-127

C-129

Connectors: C-127, C-129

AE

C-129

<RHD>

C-127

AC310456

Connectors: C-111

AP

<RHD>

AC310459

C-214
Harness side

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

Connectors: C-210, C-214, C-217

AE

C-214

Junction block (front view)

<RHD>

C-210

C-210
Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

C-217

C-217

Harness side

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-212

FOG LAMP

INSPECTION PROCEDURE J-1: The rear fog lamps do not illuminate normally.

CAUTION

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

ETACS-ECU

FUSIBLE
LINK

1

COMBINATION
METER

REAR
COMBINATION
LAMP
(REAR FOG)

REAR
FOG
LAMP
RELAY

Rear Fog Lamp Circuit <LHD>

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-213

OPERATION

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

• Tail lamp switch

• Headlamp switch

• Rear fog lamp switch

If the rear fog lamps do not illuminate normally, these 
input signal circuit(s) or the ETACS-ECU may be 
defective.

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

COMBINATION
METER

REAR
COMBINATION
LAMP
(REAR FOG)

REAR FOG
LAMP RELAY

ETACS-
ECU

FUSIBLE
LINK

1 

Rear Fog Lamp Circuit <RHD>

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-214

POSSIBLE CAUSES

• Malfunction of the column switch

• Malfunction of the fog lamp switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Check that the tail lamps and headlamps 
operate.
Check that the tail lamps and headlamps illuminate 
normally.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Check the tail lamps and the headlamps 
(Refer to trouble symptom chart 

P.54B-33

).

Step 2. Pulse check
Check the input signals below, which are related to 
the rear fog 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 

3.

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

."

The tail lamp switch signal is not received. : 

Refer 

to inspection procedure L-4 "The column 
switch (lighting and turn-signal lamp switch) 
signal is not received 

P.54B-248

."

The headlamp switch signal is not received. : 

Refer to inspection procedure L-4 "The 
column switch (lighting and turn-signal lamp 
switch) signal is not received 

P.54B-248

."

The rear fog lamp switch signal is not received. : 

Refer to inspection procedure L-14 "The 
rear fog lamp switch signal is not received 

P.54B-283

."

Step 3. Connector check: C-219 rear fog lamp 
relay connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the defective connector.

Step 4. Check the rear fog lamp relay.
Refer to GROUP 54A 

− Rear fog lamp 

P.54A-64

.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the rear fog lamp relay.

System switch

Check condition

Ignition switch (IG1)

When turned from ACC 
to ON

Tail lamp switch

When the lighting switch 
is turned to the TAIL 
position

Headlamp switch

When the lighting switch 
is turned to the 
HEADLAMP position

Rear fog lamp switch

When the rear fog lamp 
switch is turned from off 
to on

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