Mitsubishi Montero (2002-2004). Manual - part 272

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

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General circuit diagram for the power windows

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-136

INSPECTION PROCEDURE D-1: Power Window: Power windows do not work at all.

NOTE: This troubleshooting procedure requires the use of scan tool MB991502 and SWS monitor kit 
MB991862. For details on how to use the SWS monitor, refer to "How to use SWS monitor 

P.54Ba-8

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Power Window Relay Circuit

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

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CIRCUIT OPERATION
The ETACS-ECU turns on the power window relay to 
activate the power windows when the ignition switch 
(IG1) is in the "ON" position. The power window relay 
is located in the under-dash junction block, to the left 
of the steering column. It plugs into connector D-219. 

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TROUBLESHOOTING HINTS

• The power window relay 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

ACX02274

FUSIBLE LINK (4)

AD

BATTERY

AC000758

CONNECTORS: D-25, D-28

AK

D-25

D-28

ACX02285

CONNECTORS: D-208, D-219, D-221

AG

D-208

D-219

JUNCTION BLOCK (FRONT VIEW)

D-221

POWER WINDOW
RELAY

AC203774

CONNECTOR: H-05

AD

DRIVER'S DOOR

H-05

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

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DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II)

• MB991862: SWS Monitor Kit

STEP 1. Use scan tool MB991502 to select "ECU COMM 
CHK" on the SWS monitor display.
Check the ETACS-ECU.

CAUTION

To prevent damage to scan tool MB991502, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502. 
(1) Connect scan tool MB991502 to the data link connector 

(16-pin).

(2) Connect SWS monitor kit MB991862 to the data link 

connector (13-pin).

(3) Turn the ignition switch to the "ON" position.
(4) Operate scan tool MB991502 according to the procedure 

below to display "ECU COMM CHK."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "ECU COMM CHK."

(5) Scan tool MB991502 should show "OK" on the "ECU 

COMM ECU" menu for the ETACS ECU menu.

Q: Is "OK" displayed on the "ETACS ECU" menu?

"OK" is displayed for all the items : Go to Step 2.
"NG" is displayed on the "ETACS ECU" menu : Refer to 

Inspection Procedure A-3 "Communication with 
ETACS-ECU is not possible 

P.54Bb-25

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AC204222AB

16-pin

13-pin

MB991502

MB991862