Mitsubishi Lancer Evolution IX. Manual - part 197

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-47

INSPECTION PROCEDURE A-5: Communication with the power window main switch (power window 

module) is not possible.

CAUTION

Whenever the ECU is replaced, ensure that the 

power supply circuit, the earthing circuit and the 

communication circuit are normal.

POWER
WINDOW RELAY

ETACS-ECU

POWER WINDOW
MAIN SWITCH

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

FUSIBLE
LINK

5

J/B SIDE

CPU

Power Window Main Switch and SWS Communication Circuit

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-48

COMMENTS ON TROUBLE SYMPTOM

The power window main switch, the power supply 
circuit (power window relay driving circuit) or commu-
nication circuit for that switch may be defective.

POSSIBLE CAUSES

• Malfunction of the power window main switch

• Malfunction of the power window relay

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. 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 2.

NO : 

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

P.54C-36

."

Step 2. SWS monitor data list.

<Selected item> ETACS ECU

• Ignition switch: ON

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

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

P.54C-261

."

Step 3. Connector check: E-05 power window 
main switch connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the defective connector.

Step 4. Voltage measurement at the E-05 power 
window main switch connector

(1) Disconnect the connector, and measure at the 

wiring harness side.

Item No.

Item name

Normal 
condition

Item 30

IG SW(IG1)

ON

AC310484

Connector: E-05 <LHD>

AD

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

Front door (LH)

AC310493

Connector: E-05 <RHD>

AG

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

Front door (RH)

AC310484

Connector: E-05 <LHD>

AD

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

Front door (LH)

AC310493

Connector: E-05 <RHD>

AG

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

Front door (RH)

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-49

(2) Ignition switch: ON

(3) Voltage between E-05 power window main switch 

connector terminal No.6 and body earth

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Go to Step 5.

Step 5. Connector check: C-224 power window 
relay connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

Step 6. Check the power window relay.
Refer to GROUP 42 

− Door 

P.42-24

.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Replace the power window relay.

Step 7. Voltage measurement at C-224 power 
window relay connector

(1) Remove the power window relay, and measure at 

the junction block side.

(2) Voltage between C-224 power window relay 

connector terminal No.5 and body earth

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Go to Step 8.

AC301541BH

Connector E-05
(Harness side)

10

1

6

14

5

12

13

4

11

7

2

3

8

9

AC310448

AI

Connector: C-224 <LHD>

Junction block (front view)

Junction block side

AC310458

AG

Connector: C-224 <RHD>

Junction block (front view)

Junction block 
side

AC310448

AI

Connector: C-224 <LHD>

Junction block (front view)

Junction block side

AC310458

AG

Connector: C-224 <RHD>

Junction block (front view)

Junction block 
side

AC310507

Connector C-224
(Junction block side)

AG

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-50

Step 8. Check the wiring harness between C-224 
power window relay connector terminal No.5 and 
fusible link (5).

NOTE: 

Prior to the wiring harness inspection, check interme-
diate connector C-126 and junction block connector 
C-211, and repair if necessary.

• Check the power supply line 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.

AC310523AC

Fusible link: No.5

AC310449

AD

Connectors: C-211, C-224 <LHD>

Junction block (front view)

Junction block side

C-211

C-224

C-224

Harness side

C-211

AC310459

AD

Connectors: C-211, C-224 <RHD>

Junction block (front view)

Junction block side

C-211

C-224

C-224

Harness side

C-211

AC310446

Connector: C-126 <LHD>

AD

AC310454

Connector: C-126 <RHD>

AF