Mitsubishi Montero (2004+). Manual - part 723

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-149

STEP 1. Use scan tool MB991958 to select "ECU COMM 
CHK" on the SWS monitor display.
Check the ETACS-ECU.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958. 
(1) Connect the special tool. Refer to "How to connect SWS 

monitor 

P.54B-7

(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 MB991958 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 MB991958 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.54B-42

."

STEP 2. Check the input signal by using "DATA LIST" 
menu of the SWS monitor.
(1) Turn the ignition switch to the "ON" position before checking 

input signals from the ignition switch (IG1).

(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 item 

described in the table below.

Q: Is the scan tool display "IG SW (IG1)" as normal 

condition?
YES : Go to Step 3.
NO :  Refer to Inspection Procedure O-2 "ETACS-ECU 

does not receive a signal from the ignition switch 
(IG1) 

P.54B-505

."

AC309091

MB991911

MB991827

MB991824 

AB

MB991806

MB991862

DATA LINK
CONNECTOR 
(16-PIN)

DATA LINK
CONNECTOR 
(13-PIN)

ITEM NO.

ITEM NAME

NORMAL CONDITION

ITEM 30

IG SW (IG1)

ON

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-150

STEP 3. Check power window relay connector D-219 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is power window relay connector D-219 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 power windows function 

should now work normally.

STEP 4. Check the power window relay.
Properly identify and remove the relay from the under-dash 
junction block and test the relay using the chart as a guide.

Q: Is the power window relay in good condition?

YES : Go to Step 5.
NO :  Replace the power window relay. Verify that the 

power windows function should now work normally.

AC203850AB

CONNECTOR: D-219

JUNCTION BLOCK 
(FRONT VIEW)

D-219

1

2

3

4

5

JUNCTION 
BLOCK SIDE

D-219

BATTERY CONNECTION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

Not applied

4 

− 5

Open circuit

• Connect terminal No.3 

and the positive battery 
terminal

• Connect terminal No.1 

and the negative battery 
terminal

4 

− 5

Less than 2 
ohms

AC203858AC

1 2 3

4

5

POWER WINDOW
RELAY D-219

CONNECTOR: D-219

JUNCTION BLOCK 
(FRONT VIEW)

5

4

1

3

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-151

STEP 5. Measure at power window relay connector D-219 
in order to check the fusible link (4) line of power supply 
system to power window relay.
(1) Disconnect power window relay connector D-219, and 

measure at the junction block side.

(2) Measure the voltage between terminal numbers 3, 5 and 

ground.

• The voltage should be approximately 12 volts (battery 

positive voltage).

Q: Is the measured voltage approximately 12 volts (battery 

positive voltage)?
YES : Go to Step 7.
NO :  Go to Step 6.

AC203850AB

CONNECTOR: D-219

JUNCTION BLOCK 
(FRONT VIEW)

D-219

1

2

3

4

5

JUNCTION 
BLOCK SIDE

D-219

1

2

3

4

5

ACX01571AB

CONNECTOR D-219
(JUNCTION BLOCK SIDE)

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-152

STEP 6. Check the wiring harness between power window 
relay connector D-219 (terminal 5) and fusible link (4).

ACX02274

FUSIBLE LINK (4)

AD

BATTERY

AC204191

CONNECTORS : D-219, D-221

D-219

D-221

BB

D-219

HARNESS SIDE

JUNCTION BLOCK SIDE

D-221

3

1

4

6 5

7

8

2