Mitsubishi Montero (2004+). Manual - part 749

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-253

STEP 6. Check the wiring harness between windshield 
wiper motor connector B-12 (terminal 3) and front-ECU 
connector A-08X (terminal 23).

NOTE: Also check intermediate connector A-05 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If junction block connector A-05 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 windshield wiper motor 

connector B-12 (terminal 3) and front-ECU connector 
A-08X (terminal 23) in good condition?
YES : Replace the front-ECU. The windshield wiper should 

stop at the predetermined park position.

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. The 
windshield wiper should now stop at the 
predetermined park position.

AC204183

CONNECTOR : A-08X

AC

22

23

21

26 25

27

28

31 30 29

24

RELAY BOX SIDE

A-08X

AC205116 AD

CONNECTOR: B-12

B-12 (B)

(HARNESS SIDE)

B-12 (B)

1

2

3

4

5

AC205142AC

CONNECTOR: A-05

A-05(B)

A-05(B)

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-254

INSPECTION PROCEDURE G-5: Windshield Wiper and Washer: Windshield intermittent wiper interval 
can not be adjusted by means of windshield intermittent wiper interval adjusting knob.

NOTE: This troubleshooting procedure requires the 
use of scan tool MB991958 and SWS monitor kit 
MB991862. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor

P.54B-10

."

.

TECHNICAL DESCRIPTION (COMMENT)
If the windshield intermittent wiper interval is not 
changed by operating the windshield intermittent 
wiper interval adjusting knob or according to the 
vehicle speed, the column switch, the ETACS-ECU 
or the front-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The column switch (windshield wiper and washer 

switch) may be defective

• The ETACS-ECU may be defective

• The front-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

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

• MB991813: SWS Monitor Kit

• MB991806: SWS Monitor Cartridge

• MB991812: SWS Monitor Harness (For Column-ECU)

• MB991822: Probe Harness

Windshield Intermittent Wiper Interval Adjusting Knob Input Signal

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-255

Check the input signal by using "FUNCTION DIAG." menu 
of the SWS monitor.
Set each switch to the following condition to check input signals 
from the windshield intermittent wiper interval adjusting knob:

• Ignition switch: ACC

• Windshield wiper switch: INT

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. Connect 
the DLC harness before connecting the column-ECU har-
ness. Be sure to connect SWS monitor kit MB991862 after 
turning on 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) Operate scan tool MB991958 according to the procedure 

below to display "F.WIPER INT."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "FUNCTION DIAG."
5. Select "WIPER."
6. Select "F.WIPER INT."

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

described in the table below.
NOTE: Also check that the windshield wiper interval 
changes smoothly when the windshield intermittent wiper 
interval adjusting knob is rotated from "SLOW" to "FAST" 
positions.

Q: Does the value change within the normal range when 

the windshield intermittent wiper interval adjusting 
knob is rotated?
YES : Replace the front-ECU. Check that the windshield 

intermittent wiper interval changes according to the 
vehicle speed or while the windshield intermittent 
wiper interval adjusting knob is rotated.

NO :  Refer to Inspection Procedure O-7 "ETACS-ECU 

does not receive a signal from the windshield mist 
wiper switch 

P.54B-529

."

ITEM NO. ITEM NAME

NORMAL CONDITION

ITEM 37

INT WIPER TIME

2.4 

− 18.0 s

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-256

INSPECTION PROCEDURE G-6: Windshield Wiper and Washer: The windshield washer does not 
work.

NOTE: This troubleshooting procedure requires use 
of scan tool MB991958 and SWS monitor kit 
MB991862. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor 

P.54B-10

."

IGNITION
SWITCH (ACC)

WINDSHIELD
WASHER MOTOR

JUNCTION 
BLOCK

WINDSHIELD
WASHER
RELAY

FRONT-ECU

RELAY
BOX

Windshield Washer Motor Circuit