Mitsubishi Lancer Evolution IX. Manual — part 246

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-243

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) USING SWS MONITOR

54C-244

INTERIOR LAMP

INSPECTION PROCEDURE K--1: The front or rear room lamp does 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) USING SWS MONITOR

54C-245

DIAGNOSIS 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 GROUP 54B

− Adjustment

function

P.54B-302

).

Step 2. ECU check by using the SWS monitor.
Check that the power supply and earth lines to the
ETACS-ECU and the SWS communication lines are
normal.

• 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 :

Go to Step 3.

NO :

Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible

P.54C-36

."

Step 3. SWS monitor data list.
Check the input signals below, which are related to
the front and rear dome lamps.

<Selected item> ETACS ECU

• Ignition switch: OFF

OK: Normal condition is displayed.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

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

P.54C-261

."

Step 4. Pulse check
Check the input signals below, which are related to
the front or rear dome 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

5.

The key reminder switch signal is not received. :

Refer to Inspection Procedure L-9 "The key
reminder switch signal is not received

P.54C-281

."

All the door switch signals are not received. :

Refer to Inspection Procedure L-11 "All the
door switch signals are not received <LH
drive vehicles>

P.54C-289

," or refer to

Inspection Procedure L-11 "All the door
switch signals are not received <RH drive
vehicles>

P.54C-292

."

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

Refer to Inspection Procedure L-12

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

P.54C-296

," or refer to Inspection

Procedure L-12 "The front door lock
actuator (RH) switch signal is not received
<RH drive vehicles>

P.54C-299

."

The interior lamp loaded signal is not received. :

Refer to Inspection Procedure L-15 "The
interior lamp loaded signal is not detected

P.54C-307

."

Step 5. 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 6.

The luggage compartment lamp does not
illuminate. :

Go to Step 11.

Item No.

Item name

Normal
condition

Item 30

IG SW(IG1)

OFF

System switch

Check condition

Key reminder switch When the inserted ignition

key is pulled out

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

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-246

Step 6. Connector check: D-05 front room lamp
connector, D-07 rear room lamp connector

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Repair the defective connector.

Step 7. Check the bulbs of the front or rear room
lamps.
Check that the front or rear room lamp bulbs are not
burned out.

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Replace the front or rear room lamp bulb.

Step 8. Connector check: C-226 ETACS-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 9.

NO :

Repair the defective connector.

AC310464

Harness side

D-05

D-05

AB

Connectors: D-05, D-07

Harness side

D-07

<LHD>

D-07
(GR)

AC310472

Harness side

D-05

D-05

AB

Connectors: D-05, D-07

Harness side

D-07

<RHD>

D-07
(GR)

AC310450

Connector: C-226

AB

Junction block side

Junction block (rear view)

<LHD>

AC310461

Junction block (rear view)

Connector: C-226

AB

<RHD>

Junction block side