Mitsubishi Montero (2002-2004). Manual - part 261

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-91

AC000759

CONNECTORS: D-15, D-111

AB

D-15

D-111

AC000758

CONNECTORS: D-25, D-125

AI

D-25

D-125

ACX02285

CONNECTORS: D-209, D-217

AL

D-209

D-217

JUNCTION BLOCK (FRONT VIEW)

ACX02286

CONNECTOR: D-222

AC

JUNCTION BLOCK (REAR VIEW)

ACX02289

CONNECTORS: F-12, F-23

F-23

AE

F-12

AC204524

CONNECTOR: G-10

AB

G-10

AC000237AI

H-13

CONNECTOR: H-13

REAR DOOR <LH>

AC000235 AD

H-10

CONNECTOR: H-10

FRONT DOOR <DRIVER'S SIDE>

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

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.

CIRCUIT OPERATION

• The ETACS-ECU controls the central door lock 

system, locking or unlocking all the doors by acti-
vating the central door lock relay (built into the 
ECU). The ETACS-ECU uses inputs from the fol-
lowing components:

• Driver's or passenger's door lock actuator 

switch

• Driver's or passenger's door lock key cylinder 

switch

• Door lock switch, which is incorporated in the 

power window main switch or power window 
sub switch (front RH)

.

TECHNICAL DESCRIPTION (COMMENT)
If only some doors do not lock or unlock, the harness 
wiring between the door lock actuator or the ETACS-
ECU and the door lock actuator may be defective.

.

TROUBLESHOOTING HINTS

• The driver’s or front passenger’s door lock actua-

tor may be defective

• The ETACS-ECU may be defective

• The harness wiring or connectors may have 

loose, corroded or damaged terminals, or termi-
nals pushed back in the connector 

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check which door lock is defective.
Q: Which of the door locks is defective?

Driver's door : Go to Step 2.
Front passenger's door : Go to Step 6.
Rear passenger's door (LH) : Go to Step 10.
Rear passenger's door (RH) : Go to Step 14.
Back door : Go to Step 18.

AC000238AJ

H-24

CONNECTOR: H-24

FRONT DOOR <RH>

AC000316 AH

H-21

CONNECTOR: H-21

REAR DOOR <RH>

ACX02293

CONNECTOR: I-05

AB

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

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STEP 2. Check the driver's door lock actuator.

1. Remove the driver's door lock actuator, and check it. Refer 

to GROUP 42 

− Door Handle and Latch 

P.42-40

.

2. Follow the table below to check the driver's door lock actua-

tor for correct operation.

Q: Does the driver's door lock actuator work normally?

YES : Go to Step 3.
NO :  Replace the driver's door lock actuator. Verify that all 

the doors can be locked and unlocked function should 
now work normally. 

LEVER 
POSITION

BATTERY 
CONNECTION

LEVER 
OPERATION

At the 
"LOCK" 
position

• Connect terminal 4 to 

the positive battery 
terminal

• Connect terminal 6 to 

the negative battery 
terminal

The lever moves 
from the "LOCK" 
position to the 
"UNLOCK" position.

At the 
"UNLOCK" 
position

• Connect terminal 6 to 

the positive battery 
terminal

• Connect terminal 4 to 

the negative battery 
terminal

The lever moves 
from the "UNLOCK" 
position to the 
"LOCK" position.

ACX00543

LOCK

UNLOCK

VIEW A

A

AE

LEVER

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STEP 3. Check ETACS-ECU connector D-222 and driver's 
door lock actuator connector H-10 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are ETACS-ECU connector D-222 and driver's door lock 

actuator connector H-10 in good condition?
YES : Go to Step 4.
NO :  Repair or check the connector. Refer to GROUP 00E, 

Harness Connector Inspection 

P.00E-2

. After repairs 

have been made, verify that all the doors can now be 
locked and unlocked normally.

AC204174

CONNECTOR : D-222

AB

1

2

3

5

6

4

9 8

121110

13

15 14

16

17

7

19

20

18

JUNCTION BLOCK SIDE

D-222

AC000235 AE

H-10 (B)

CONNECTOR: H-10

FRONT DOOR <DRIVER'S SIDE>

1 2 3

4 5 6

H-10 (B)