Mitsubishi Montero (2004+). Manual - part 726

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-161

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

• Ignition switch: ON to OFF

• Driver’s and front passenger’s doors: closed

(2) Operate scan tool MB991958 according to the procedure 

below to display "ETACS ECU."

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

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

described in the table below.

Q: Does the scan tool display the items "IG SW (IG1)" and 

"FRONT DOOR SW" as normal condition?
Normal conditions are displayed for all the items : 

Replace the ETACS-ECU. Verify that the power 
window timer should now works normally.

The scan tool does not show the respective normal 
condition for item "IG SW (IG1)." : Refer to Inspection 

Procedure O-2 "ETACS-ECU does not receive a 
signal from the ignition switch (IG1) 

P.54B-505

."

The scan tool does not show the respective normal 
condition for item "FRONT DOOR SW." : Refer to 

Inspection Procedure O-5 "ETACS-ECU does not 
receive any signal from the driver’s or front 
passenger’s door switch 

P.54B-520

."

ITEM NO.

ITEM NAME

NORMAL 
CONDITION

ITEM 30

IG SW (IG1)

OFF

ITEM 32

FRONT DOOR 
SW

OFF

AC309091

MB991911

MB991827

MB991824 

AB

MB991806

MB991862

DATA LINK
CONNECTOR 
(16-PIN)

DATA LINK
CONNECTOR 
(13-PIN)

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-162

INSPECTION PROCEDURE D-3: Power Window: Only the front door window (LH) does not work 
normally by operating power window main switch.

.

CIRCUIT OPERATION
The front power window motor (LH) opens or closes 
the door window (LH) when the power window main 
switch is moved to "UP" or "DOWN" position.

.

TECHNICAL DESCRIPTION (COMMENT)
The power window main switch or the front power 
window motor (LH) may be defective.

.

TROUBLESHOOTING HINTS

• The power window main switch may be defective

• The front power window motor (LH) 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 Tool:

• MB991223: Harness Set

Power Window (front: LH) Circuit

AC000235AB

CONNECTORS: H-04, H-05

H-04

H-05

<DRIVER'S SIDE>

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-163

STEP 1. 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 2.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the front power window (LH) 

function should now work normally.

STEP 2. Check the power window main switch.
(1) Remove the power window main switch. Refer to GROUP 

42, Door Trim 

P.42-31

.

(2) Check continuity while power window main switch is moved 

to "UP" and "DOWN" position.

Q: Is the power window main switch in good condition?

YES : Go to Step 3.
NO :  Replace the power window main switch. Verify that 

the front power window (LH) function should now 
work normally.

STEP 3. Check front power window motor (LH) connector 
H-04 for loose, corroded or damaged terminals, or 
terminals pushed back in the connector.
Q: Is front power window motor (LH) connector H-04 in 

good condition?
YES : Go to Step 4.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the front power window (LH) 

function should now work normally.

AC203774

CONNECTOR: H-05

AE

DRIVER'S DOOR

9

2

12

1413

1110

5

7 6

4 3

8

1

HARNESS
SIDE

FRONT (LH) 
SWITCH POSITION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

UP

3 

− 8, 5 − 7

Less than 2 ohms

OFF

3 

− 7, 3 − 8, 7 − 

8

DOWN

3 

− 7, 5 − 8

7

6

5

4

3

2

1

14

13

12

11

10

9

8

ACX02412

AC203774AI

CONNECTOR: H-04

DRIVER'S DOOR

HARNESS
SIDE

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-164

STEP 4. Check the front power window motor (LH).
(1) Remove the front power window motor (LH). Refer to 

GROUP 42, Door 

− Door Glass and Regulator 

P.42-38

.

(2) Follow the table below to check the front power window 

motor (LH) for correct operation.

Q: Is the power window motor (LH) in good condition?

YES : Go to Step 5.
NO :  Replace the front power window motor (LH). Verify 

that the front power window (LH) function should now 
work normally.

STEP 5. Check the wiring harness between power window 
main switch connector H-05 (terminal 7) and front power 
window motor (LH) connector H-04 (terminal 6).
Q: Is the wiring harness between power window main 

switch connector H-05 (terminal 7) and front power 
window motor (LH) connector H-04 (terminal 6) in good 
condition?
YES : Go to Step 6.
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. Verify that 
the front power window (LH) function should now 
work normally.

STEP 6. Check the wiring harness between power window 
main switch connector H-05 (terminal 8) and front power 
window motor (LH) connector H-04 (terminal 2).
Q: Is the wiring harness between power window main 

switch connector H-05 (terminal 8) and front power 
window motor (LH) connector H-04 (terminal 2) 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. Verify that 
the front power window (LH) function should now 
work normally.

BATTERY CONNECTION

SLIDER POSITION

• Connect terminal 1 to the 

negative battery terminal

• Connect terminal 2 to the 

positive battery terminal

The slider moves up

• Connect terminal 1 to the 

positive battery terminal

• Connect terminal 2 to the 

negative battery terminal

The slider moves down

AC309019

1 2

SLIDER

AB

AC203774

CONNECTORS: H-04, H-05

AG

DRIVER'S DOOR

H-05

H-05

(HARNESS SIDE)

H-04

H-04

(HARNESS SIDE)

AC203774

CONNECTORS: H-04, H-05

AG

DRIVER'S DOOR

H-05

H-05

(HARNESS SIDE)

H-04

H-04

(HARNESS SIDE)