Mitsubishi Montero (2002-2004). Manual - part 393

INPUT SIGNAL PROCEDURES

TSB Revision

SWS INPUT SIGNAL PROCEDURES

54Bc-119

INSPECTION PROCEDURE P-7: ETACS-ECU does not receive any signal from the door lock switch 
(incorporated in power window main switch and power window sub switch).

Door Lock Switch Input Circuit

AC204171

CONNECTOR : D-15

AH

AC204170

CONNECTOR : D-25

AZ

INPUT SIGNAL PROCEDURES

TSB Revision

SWS INPUT SIGNAL PROCEDURES

54Bc-120

.

CIRCUIT OPERATION
The ETACS-ECU operates the central door locking 
system according to signal from the door lock switch.

.

TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the doors is not locked or 
unlocked. If the signal is not normal, the power win-
dow main switch, power window sub switch or the 
ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The power window main switch or power window 

sub switch (door lock switch) may be defective

• The ETACS-ECU may be defective

• The wiring harness or connectors may have 

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

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II)

STEP 1. Verify which door switch is defective.
Q: Which door switch signal is not entered?

Power window main switch (Driver's door) : Go to Step 

2.

Power window sub switch (Front passenger's door) : 

Go to Step 8.

Power window main switch (driver's door) and power 
window sub switch (front passenger's door) : Go to Step 

14.

Power window main switch (driver's door) and power 
window sub switch (front passenger's door) (Lock 
signal only) : Go to Step 16.
Power window main switch (driver's door) and power 
window sub switch (front passenger's door) (Unlock 
signal only) : Go to Step 18.

AC204174

CONNECTOR : D-223

D-223(B)

AF

AC204180

CONNECTOR : H-05

AG

AC204181

CONNECTOR : H-16

AF

INPUT SIGNAL PROCEDURES

TSB Revision

SWS INPUT SIGNAL PROCEDURES

54Bc-121

STEP 2. Check the door lock switch (power window main 
switch).
Remove the power window main switch. Then check continuity 
between the switch terminals.

Q: Is the door lock switch (power window main switch) in 

good condition?
YES : Go to Step 3.
NO :  Replace the power window main switch. If the central 

door locking system works normally, input signal from 
the door lock switch should be normal.

STEP 3. Check the ground circuit to the power window 
main switch. Test at power window main switch connector 
H-05.
(1) Disconnect power window main switch connector H-05 and 

measure the resistance available at the wiring harness side 
of the connector.

(2) Measure the resistance value between terminal 3 and 

ground.

• The resistance should equal 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 6.
NO :  Go to Step 4.

SWITCH 
POSITION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

LOCK

3 

− 12

Less than 2 ohms

OFF

3 

− 10, 3 − 12

Open circuit

UNLOCK

3 

− 10

Less than 2 ohms

7

6

5

4

3

2

1

14

13

12

11

10

9

8

ACX02412

AC204180

CONNECTOR : H-05

AC

HARNESS SIDE

<DRIVER'S SIDE>

1
8

3

4

6

7

5

10

11

13

14

12

2
9

H-05

1

2

3

4

5

6

7

8

9

10

11

12

13

14

ACX01606 AB

CONNECTOR H-05
(HARNESS SIDE)

INPUT SIGNAL PROCEDURES

TSB Revision

SWS INPUT SIGNAL PROCEDURES

54Bc-122

STEP 4. Check power window main switch connector H-05 
for loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is power window main switch connector H-05 in good 

condition?
YES : Go to Step 5.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. If the central door locking system works 

normally, input signal from the door lock switch should 
be normal.

STEP 5. Check the wiring harness between power window 
main switch H-05 (terminal 3) and ground.

NOTE: Also check intermediate connector D-25 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate connector D-25 is damaged, repair or 
replace the damaged component(s) as described in GROUP 
00E, Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between power window main 

switch connector H-05 (terminal 3) and ground in good 
condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. If the central 
door locking system works normally, input signal from 
the door lock switch should be normal.

AC204180

CONNECTOR : H-05

AC

HARNESS SIDE

<DRIVER'S SIDE>

1
8

3

4

6

7

5

10

11

13

14

12

2
9

H-05

AC204180

CONNECTOR : H-05

AC

HARNESS SIDE

<DRIVER'S SIDE>

1
8

3

4

6

7

5

10

11

13

14

12

2
9

H-05

AC204170

CONNECTOR : D-25

AE

10

9

31

30

20 21

7

6

28

17 18

8

19

29

4

3

25 26

14 15

1

23

12

2

13

24

5

16

27

11

22

32