Mitsubishi Colt Ralliart. Manual - part 327

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-52

CENTRAL DOOR LOCKING SYSTEM

INSPECTION PROCEDURE C-1: Central door locking system does not work.

CAUTION

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

COMMENT ON TROUBLE SYMPTOM

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

POSSIBLE CAUSES

• Malfunction of the front door lock actuator (RH)

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

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

FUSIBLE 
LINK

FRONT
DOOR LOCK
ACTUATOR
(RH)

FRONT
DOOR LOCK
ACTUATOR
(LH)

REAR
DOOR LOCK
ACTUATOR
(LH)

REAR
DOOR LOCK
ACTUATOR
(RH)

DOOR
UNLOCK
RELAY

DOOR
LOCK
RELAY

TAILGATE
LOCK
ACTUATOR

J/B SIDE

Central Door Lock Power Supply Circuit

6

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-53

DIAGNOSIS PROCEDURE

Step 1. Check the power supply circuit.
When the ignition switch is turned to the LOCK 
(OFF) position, check if the hazard warning lamps 
illuminate.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Refer to Inspection Procedure A-2 "When 
the ignition switch is at the LOCK (OFF) 
position, the functions do not work normally. 
Check the battery power supply circuit to 
the ETACS-ECU 

P.54B-43

."

Step 2. Pulse check
Check the ETACS-ECU input signal related to the 
central door locking system.

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

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.54B-223

."

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.

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.

System switch

Check condition

Driver's inside lock knob LOCK

→ UNLOCK

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) NOT USING SWS MONITOR

54B-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) NOT USING SWS MONITOR

54B-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 Step 4.

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