Mitsubishi Montero (2004+). Manual - part 751

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-261

STEP 7. Check the wiring harness between windshield 
washer motor connector A-33 (terminal 1) and ground.
Q: Is the wiring harness between windshield washer motor 

connector A-33 (terminal 1) and ground 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 windshield washer works normally.

STEP 8. Check front-ECU connector A-08X for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is front-ECU connector A-08X in good condition?

YES : Go to Step 9.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the windshield washer works 

normally.

AC205145AE

CONNECTOR: A-33

HARNESS SIDE

AC204183

CONNECTOR : A-08X

AC

22

23

21

26 25

27

28

31 30 29

24

RELAY BOX SIDE

A-08X

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-262

STEP 9. Check the wiring harness between windshield 
washer motor connector A-33 (terminal 1) and front-ECU 
connector A-08X (terminal 21).
Q: Is the wiring harness between windshield washer motor 

connector A-33 (terminal 1) and front-ECU connector 
A-08X (terminal 21) 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 windshield washer works normally.

REAR WIPER AND WASHER

GENERAL DESCRIPTION CONCERNING THE REAR WIPER AND WASHER

M1549021600072

The following ECUs affect the functions and control 
of the rear wiper and washer.

Rear wiper and washer control function

.

Rear wiper control
If the rear wiper switch of the column switch assem-
bly is turned ON with the ignition switch in the ACC 
or ON position, the ETACS-ECU will turn the rear 
wiper drive signal ON for 3 seconds (approximately 2 
operations), and then will carry out intermittent oper-
ation in a 7.4 to 8 seconds cycle.

If the selector lever is moved to the "R" position when 
the rear wiper switch of the column switch assembly 
is turned ON and the ignition switch is in any position 
other than OFF, the transmission range switch "R" 
position switch turns ON. One second later, the 
ETACS-ECU turns the rear wiper drive signal ON for 
3 seconds (approximately 2 operations), to clear the 
rear view, and then returns to intermittent operation 
at a 7.4 to 8 seconds cycle.

AC204183

CONNECTOR : A-08X

AC

22

23

21

26 25

27

28

31 30 29

24

RELAY BOX SIDE

A-08X

AC205145AE

CONNECTOR: A-33

HARNESS SIDE

FUNCTION

CONTROL ECU

Rear wiper control 

ETACS-ECU, column switch

Rear washer control

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-263

.

Rear washer control
When the ignition switch is at the ACC or ON posi-
tion, if the rear washer switch of the column switch is 
turned ON, the ETACS-ECU turns ON the rear 
washer relay. The rear wiper drive signal is turned 
ON in 0.3 second until 3 seconds after the rear 
washer switch goes OFF to operate the rear wiper 
continuously.

If the rear wiper is in intermittent operation when the 
rear washer switch is turned ON, 7.4 seconds after 
the rear wiper drive signal turns OFF, the 8 seconds 
cycle intermittent operation will continue.

General circuit diagram for the rear wiper and washer 

AC101553

T3

T3

T4

T4

T4

T4

T4

AE

T1

T1

T2

T2

T2

t

ON

ON

ON

OFF

OFF

OFF

REAR WIPER SWITCH

PARK/NEUTRAL POSITION SWITCH 
"R" POSITION SWITCH

REAR WIPER DRIVE SIGNAL

t: 1 second
T1: 7.4 seconds
T2: 8 seconds

T3: 3 seconds
T4: 0.6 second

AC101554

T4

T4

AD

T1

T1

T2

T3

t

ON

ON

ON

OFF

OFF

OFF

REAR WASHER SWITCH

REAR WASHER RELAY

REAR WIPER DRIVE SIGNAL

t: 0.3 second
T1: 3 seconds
T2: 7.4 seconds

T3: 8 seconds
T4: 0.6 second

T1

t

t

WIPER SWITCH IN 
OFF POSITION

WIPER SWITCH IN INTERMITTENT 
OPERATION POSITION

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-264