Mitsubishi Lancer Evolution IX. Manual - part 200

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-59

CENTRAL DOOR LOCKING SYSTEM

INSPECTION PROCEDURE C-1: Central door locking system does not work. <LH drive vehicles>

CAUTION

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

DOOR
UNLOCK
RELAY

DOOR
LOCK
RELAY

DOOR LOCK
ACTUATOR
(FRONT: LH)

1

FUSIBLE
LINK

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

J/B SIDE

Central Door Lock Power Supply Circuit <LHD>

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-60

COMMENT ON TROUBLE SYMPTOM

If the central door locking system does not work at 
all, the front door lock actuator (LH) or the 
ETACS-ECU may be defective.

POSSIBLE CAUSES

• Malfunction of the front door lock actuator (LH)

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. ECU check on 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. Pulse check
Check the input signal from the driver's door lock 
actuator switch.

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

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Refer to Inspection Procedure L-12 "The 
driver's door lock actuator signal is not 
received <LH drive vehicles>

P.54C-296

 ."

Step 3. Connector check: E-04 front door lock 
actuator (LH) connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the defective connector.

Step 4. Check the front door lock actuator (LH)
Check that the front door lock actuator (LH) works 
normally. Refer to GROUP 42 

− Door 

P.42-31

.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the front door lock actuator (LH).

Step 5. Connector check: C-226 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

System switch

Check condition

Driver's door lock 
actuator switch

When the driver's key cylinder 
or inside lock knob is unlocked 
or locked

AC310484

Harness side

AB

Connector: E-04 <LHD>

E-04(B)

Front door (LH)

AC310450

Connector: C-226 <LHD>

AB

Junction block side

Junction block (rear view)

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-61

Step 6. Check the wiring harness between C-226 
ETACS-ECU connector terminal No.2 and fusible 
link (1).

NOTE: 

Prior to the wiring harness inspection, check interme-
diate connector C-126 and junction block connector 
C-212, and repair if necessary.

• Check the power supply line for open or short cir-

cuit.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

Step 7. Retest the system.
Check that the central door locking system works 
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.

AC310450

Connector: C-226 <LHD>

AB

Junction block side

Junction block (rear view)

AC310523AB

Fusible link: No.1

AC310446

Connector: C-126 <LHD>

AD

AC310448

Harness side

Junction block (front view)

Connector: C-212 <LHD>

AF

C-212 (B)

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-62

INSPECTION PROCEDURE C-1: Central door locking system does not work. <RH drive vehicles>

CAUTION

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

DOOR
UNLOCK
RELAY

DOOR
LOCK
RELAY

DOOR LOCK
ACTUATOR
(FRONT: RH)

1

FUSIBLE
LINK

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

J/B SIDE

Central Door Lock Power Supply Circuit <RHD>