Mitsubishi Colt Ralliart. Manual - part 386

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-52

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

ECU 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-41

."

Step 2. ETACS switch data by using the SWS 
monitor
Check the ETACS-ECU input signal related to the 
central door locking system.

• Driver's door lock actuator switch: LOCK → 

UNLOCK

OK: Normal conditions are displayed for all 
the items.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Refer to inspection procedure N-11 "The 
driver's door lock actuator switch signal is 
not received 

P.54C-226

."

Step 3. Connector check: B-134 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the defective connector.

Step 4. Check the wiring harness between B-134 
ETACS-ECU connector terminal No.1 to fusible 
link (6).

NOTE: 

Prior to the wiring harness inspection, check junction 
block connector B-108, 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 5.

NO : 

Repair the wiring harness.

Item No.

Item name

Normal 
condition

Item 21

DR DOR LCK SW

from OFF 
to ON

Item 22

DR DOR ULK SW

from ON 
to OFF

AC313872 AH

Connector: B-134

Harness side

Junction block (Rear view)

AC313872 AH

Connector: B-134

Harness side

Junction block (Rear view)

AC313870

Connector: B-108

BD

Junction block (Front view)

B-108(B)

Harness side

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-53

Step 5. 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 

use Troubleshooting/inspection Service 
Points 

− How to Cope with Intermittent 

Malfunction 

P.00-13

).

NO : 

Replace the ETACS-ECU.

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Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-54

INSPECTION PROCEDURE C-2: A door can not be locked or unlocked by the central door locking 
system.

CAUTION

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

ETACS-ECU

FRONT
DOOR LOCK
ACTUATOR
(LH)

FRONT
DOOR LOCK
ACTUATOR
(RH)

REAR
DOOR LOCK
ACTUATOR
(LH)

REAR
DOOR LOCK
ACTUATOR
(RH)

TAILGATE LOCK
ACTUATOR

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

DOOR
UNLOCK
RELAY

DOOR
LOCK
RELAY

J/B SIDE

Central Door Lock Circuit

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-55

COMMENT ON TROUBLE SYMPTOM

If a door can not be locked or unlocked by the central 
door locking system, the door lock actuator may be 
defective.

POSSIBLE CAUSES

• Malfunction of the door lock actuator

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Confirm which door lock actuator is 
defective.

Q: Which door fails to lock correctly?

Driver's door : 

Go to Step 2.

Front passenger's door : 

Go to Step 5.

Rear right door : 

Go to Step 8.

Rear left door : 

Go to Step 11.

Tailgate : 

Go to Step 14.

Step 2. Check the front door lock actuator (RH)
Check that the front door lock actuator (RH) works 
normally. Refer to GROUP 42 

− Door 

P.42-46

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the front door lock actuator (RH).

Step 3. Connector check: B-132 ETACS-ECU 
connector, D-08 front door lock actuator (RH) 
connector

Q: Is the check result normal?

YES : 

Go to Step4.

NO : 

Repair the defective connector.

AC313872

Connector: B-132

AI

Harness side

Junction block (Rear view)

AC313880

Connector: D-08

AH

Harness side

D-08(B)

Main

Index

Group

TOC