Mitsubishi Montero (2002-2004). Manual - part 302

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-255

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.

AC205138

CONNECTOR: A-08X

AC

BATTERY

FRONT-ECU

A-08X

A-08X

AC205116 AC

CONNECTOR: B-12

B-12 (B)

B-12 (B)

AC205142AC

CONNECTOR: A-05

A-05(B)

A-05(B)

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-256

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 MB991502 and SWS monitor kit 
MB991862. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor 

P.54Ba-8

."

.

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

Windshield Intermittent Wiper Interval Adjusting Knob Input Signal

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-257

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II)

• MB991862: SWS Monitor Kit

STEP 1. 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 MB991502, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502. Connect 
the DLC harness before connecting the column-ECU har-
ness. Be sure to connect SWS monitor kit MB991862 after 
turning on 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) Operate scan tool MB991502 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.54Bc-31

."

ITEM NO. ITEM NAME

NORMAL CONDITION

ITEM 37

INT WIPER TIME 2.4 

− 18.0 s

AC204222AB

16-pin

13-pin

MB991502

MB991862

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-258

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

NOTE: This troubleshooting procedure requires 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

."

Windshield Washer Motor Circuit