Mitsubishi Montero (2002-2004). Manual - part 271

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-131

STEP 2. Check the input signal by using "DATA LIST" 
menu of the SWS monitor.
Check the input signals from the following switches:

• Driver’s door: open

• Front passenger’s door: close

(1) Operate scan tool MB991502 as follows:

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "DATA LIST."
5. Select "ETACS ECU."

(2) Check that normal conditions are displayed on the items 

described in the table below.

Q: The scan tool show the respective normal condition for 

item "FRONT DOOR SW."
YES : Go to Step 3.
NO :  Refer to Inspection Procedure O-5 "ETACS-ECU 

does not receive signals from the front door switches 

P.54Bc-23

."

ITEM NO.

ITEM NAME

NORMAL 
CONDITION

ITEM 32

FRONT DOOR SW ON

AC204222AB

16-pin

13-pin

MB991502

MB991862

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-132

STEP 3. Check the input signal (by using the pulse check 
mode of the monitor.)
Check the input signals from the following switches:

• Key reminder switch

• Driver's door lock actuator switch

(1) Operate scan tool MB991502 as follows:

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "PULSE CHECK."

(2) If the switches (see table below), which are applicable for 

the input signal check, are operated, verify if scan tool 
MB991502 sounds or not.

Q: Does scan tool MB991502 sound whenever the key 

reminder switch and the driver’s door lock actuator 
switch are operated?
YES : Replace the ETACS-ECU. Verify that the forgotten 

key prevention function works normally.

NO : 

• Scan tool MB991502 does not sound when the 

key reminder switch is operated: Refer to 
Inspection Procedure O-1 "ETACS-ECU does not 
receive a signal from the key reminder switch 

P.54Bc-49

."

• Scan tool MB991502 does not sound when the 

driver's door lock actuator switch is operated 
Refer to Inspection Procedure P-6 "ETACS-ECU 
does not receive a signal from the driver's door 
lock actuator switch 

P.54Bc-93

."

POWER WINDOWS

GENERAL DESCRIPTION CONCERNING THE POWER WINDOWS

M1549021900073

The following ECUs affect the functions and control 
of the power windows.

ITEM NAME

CHECK CONDITIONS

Key reminder switch

Remove

Driver's door lock actuator 
switch

Turn on and off the driver's 
door lock actuator switch.

ACX01539

16-pin

MB991502

AI

FUNCTION

CONTROL ECU

Power window main 
switch function

Raises the driver’s power window

Power window main switch

Lowers the driver’s power window
Lowers the driver’s power window by one-shot down 
function
Raises the passenger’s power window
Lowers the passenger’s power window

Power window sub 
switch function

Raises the passenger’s power window

Power window sub switch

Lowers the passenger’s power window

Power window timer function

ETACS-ECU

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-133

Power window main switch function

Raises the driver’s power window
When the driver’s power window switch on the power window 
main switch is pulled up, the system energizes its respective 
power window motor, and then driver’s window glass rises.

Lowers the driver’s power window
When the driver’s power window switch on the power window 
main switch is pushed down, the system energizes its respec-
tive power window motor, and then driver’s window glass low-
ers.

Lowers the driver’s power window by one-shot down func-
tion
When the driver’s power window switch on the power window 
main switch is pushed down fully, the system energizes its 
respective power window motor, and then driver’s window 
glass moves to its lowest position.

Raises the passenger’s power window
When the passenger’s power window switch on the power win-
dow main switch is pulled up, the system energizes its respec-
tive power window motor, and then passenger’s window glass 
rises.

AC106705

ON

OFF

ON

OFF

UPPER SIDE 

POWER
WINDOW
MOTOR

POWER
WINDOW
MAIN
SWITCH

DRIVER'S
POWER WINDOW
SWITCH UPPER 
SIDE

AH

AC106705

LOWER SIDE 

POWER
WINDOW
MOTOR

POWER
WINDOW
MAIN
SWITCH

DRIVER'S
POWER WINDOW
SWITCH LOWER 
SIDE

ON

OFF

ON

OFF

AI

AC106706

ON

OFF

ON

OFF

LOWER SIDE 

POWER
WINDOW
MOTOR

POWER
WINDOW
MAIN
SWITCH

DRIVER'S
POWER
WINDOW
SWITCH
LOWER SIDE

AC

AC106705

UPPER SIDE 

POWER
WINDOW
MOTOR

POWER
WINDOW
MAIN
SWITCH

ON

OFF

ON

OFF

PASSENGER'S
POWER WINDOW
SWITCH UPPER 
SID

e

AJ

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-134

Lowers the passenger’s power window
When the passenger’s power window switch on the power win-
dow main switch is pushed down, the system energizes its 
respective power window motor, and then passenger’s window 
glass lowers.

Power window sub switch function

Raises the passenger’s power window
When the power window sub switch is pulled up, the system 
energizes its respective power window motor, and then pas-
senger’s window glass rises.

Lowers the passenger’s power window
When the power window sub switch is pushed down, the sys-
tem energizes its respective power window motor, and then 
passenger’s window glass lowers.

Power window timer function
When the ignition switch is turned to the "ON" position, the 
power window relay is turned ON. After the ignition switch is 
turned OFF, the system continues to turn ON the power window 
relay for about 30 seconds and to enable the opening and clos-
ing of the door window by the power window switch. When the 
driver's or front passenger’s door is opened while the timer is in 
operation, the power window relay will be turned OFF.

AC106705

LOWER SIDE 

POWER
WINDOW
MOTOR

POWER
WINDOW
MAIN
SWITCH

ON

OFF

ON

OFF

AK

PASSENGER'S
POWER WINDOW
SWITCH LOWER 
SIDE

AC106705

ON

OFF

ON

OFF

UPPER SIDE

 

POWER
WINDOW
MOTOR

PASSENGER'S
POWER 
WINDOW
SUB SWITCH

UPPER SIDE

AL

AC106705

LOWER SIDE

 

POWER
WINDOW
MOTOR

PASSENGER'S
POWER 
WINDOW
SUB SWITCH

LOWER SIDE

ON

OFF

ON

OFF

AM

AC200337 AC

ON

OFF

ON

OFF

ON 

(Open)

OFF 

(Closed)

IGNITION SWITCH (IG1)

POWER WINDOW 
RELAY

DRIVER'S OR FRONT 
PASSENGER'S
SEAT DOOR
SWITCH

t

t: 30 seconds

t