Mitsubishi Lancer Evolution IX. Manual - part 171

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-247

Step 4. Connector check: C-226 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the defective connector.

Step 5. Check the wiring harness between D-01 
door switch (front: RH) connector terminal No.3 
and C-226 ETACS-ECU connector terminal No.10.

NOTE: 

Prior to the wiring harness inspection, check joint 
connector C-217, and repair if necessary.

• Check the input line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the wiring harness.

Step 6. Retest the system.
Check that the door switch (front: RH) 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.

AC310461

Junction block (rear view)

Connector: C-226

AB

<RHD>

Junction block side

AC310461

Junction block (rear view)

Connector: C-226

AB

<RHD>

Junction block side

AC310471

Harness side

AB

Connector: D-01
<RHD>

AC310458

Harness side

Junction block (front view)

Connector: C-217

AC

<RHD>

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-248

INSPECTION PROCEDURE L-4: The column switch (lighting and turn-signal lamp switch) signal is not 
received.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

Input signal from the column switch (lighting and 
turn-signal lamp switch) is used to operate the func-
tions below. If the signal is abnormal, these functions 
will not work normally.

• Lamp reminder function

• Headlamp and tail lamp

• Fog lamp

• Turn signal lamp

POSSIBLE CAUSES

• Malfunction of the column switch

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Check the column switch connector.
Check that the wiper and washer switch connector, 
the lighting switch connector and the switch body 
connector are in good condition.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Step 2. Check the column switch (lighting switch 
and switch body).
Refer to GROUP 54A 

− Column switch 

P.54A-74

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the column switch.

Step 3. M.U.T.-II/III diagnosis code.
Check that the ETACS-ECU sets a diagnosis code.

Q: Is the diagnosis code set?

YES : 

Refer to diagnosis code chart 

P.54B-14

.

NO : 

Go to Step 4.

Step 4. Retest the system.
Replace the column switch, and check if the column 
switch (lighting, turn-signal lamp) sends signal.
(1) Replace the column switch.
(2) Check if the column switch (lighting and 

turn-signal switch) sends signal.

Q: Is the check result normal?

YES : 

The procedure is complete.

NO : 

Replace the ETACS-ECU.

COLUMN-ECU

DIMMER·
PASSING SWITCH

TURN-SIGNAL 
LAMP SWITCH

LIGHTING
SWITCH

COLUMN SWITCH

Lighting Switch Input Circuit

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-249

INSPECTION PROCEDURE L-5: The column switch (windshield wiper/washer) signal is not received.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

Input signal from the column switch (wiper switch) is 
used to operate the functions below. If the signal is 
abnormal, these functions will not work normally.

• Windshield wiper and washer

POSSIBLE CAUSES

• Malfunction of the column switch

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. M.U.T.-II/III diagnosis code.
Check that the ETACS-ECU sets a diagnosis code.

Q: Is the diagnosis code set?

YES : 

Refer to diagnosis code chart 

P.54B-14

.

NO : 

Go to Step 2.

Step 2. Retest the system.
Replace the column switch, and check if the column 
switch (windshield wiper washer) sends signal.
(1) Replace the column switch.
(2) Check if the column switch (windshield 

wiper/washer) sends signal.

Q: Is the check result normal?

YES : 

The procedure is complete.

NO : 

Replace the ETACS-ECU.

WINDSHIELD 
WASHER 
SWITCH

WINDSHIELD 
WIPER SWITCH

UPPER
SIDE

UPPER
SIDE

COLUMN SWITCH

COLUMN-ECU

Windshield Wiper and Washer Switch Input Circuit

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-250

INSPECTION PROCEDURE L-6: The windshield intermittent wiper volume signal is not received.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

The intermittent wiper interval is calculated in 
accordance with the input signal from the windshield 
intermittent wiper volume. If this signal is abnormal, 
the wiper interval can not be adjusted.

POSSIBLE CAUSES

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

COLUMN 
SWITCH

WINDSHIELD 
INTERMITTENT 
WIPER INTERVAL 
ADJUSTING KNOB

UPPER
SIDE

UPPER
SIDE

ETACS-
ECU

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   

Windshield Intermittent Wiper Interval Adjusting Knob Input Circuit