Mitsubishi Montero (2004+). Manual - part 745

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-237

STEP 9. Check the wiring harness between front-ECU 
connector A-08X (terminal 24) and the ignition switch 
(ACC).

NOTE: Also check intermediate connector D-28, junction block 
connectors D-208 and D-221 for loose, corroded, or damaged 
terminals, or terminals pushed back in the connector. If inter-
mediate connector D-28, junction block connector D-208 or 
D-221 is damaged, repair or replace the damaged compo-
nent(s) as described in GROUP 00E, Harness Connector 
Inspection 

P.00E-2

.

Q: Is the wiring harness between front-ECU connector 

A-08X (terminal 24) and the ignition switch (ACC) in 
good condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the connector 

may have loose, corroded or damaged terminals, or 
terminals pushed back in the connector. Repair the 
wiring harness as necessary. Verify that the 
windshield wiper works normally.

AC204183

CONNECTOR : A-08X

AC

22

23

21

26 25

27

28

31 30 29

24

RELAY BOX SIDE

A-08X

AC204170

CONNECTOR : D-28

AI

2 3

27

32

28

33

16

15

4 5

19

18

29

17

34

7 8

35

22

21

9 10

30

36

31

37

25

24

23

6

20

1

14

26

11

13

12

38

ACX02285

CONNECTORS: D-208, D-221

BW

JUNCTION BLOCK (FRONT VIEW)

D-208

D-221

D-208

D-221

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-238

STEP 10. Check the wiring harness between windshield 
wiper motor connector B-12 (terminal 1) and front-ECU 
connector A-08X (terminal 28).

NOTE: Also check intermediate connector A-05 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate 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 1) and front-ECU connector 
A-08X (terminal 28) in good condition?
YES : Go to Step 11.
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 wiper operates normally when the 
windshield wiper switch is moved to each 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-239

STEP 11. Check the wiring harness between windshield 
wiper motor connector B-12 (terminal 4) and front-ECU 
connector A-08X (terminal 27).
Q: Is the wiring harness between windshield wiper motor 

connector B-12 (terminal 4) and front-ECU connector 
A-08X (terminal 27) 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 wiper operates normally when the 
windshield wiper switch is moved to each 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

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-240

INSPECTION PROCEDURE G-2: Windshield Wiper and Washer: The windshield wipers do not work 
when the windshield wiper switch is at "INT" or "MIST" position or the windshield washer switch is at 
"ON" position. However, the wipers work at low speed when the windshield wiper switch is at "LO" or 
"HI."

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)
The system may be at fail-safe mode as the SWS 
communication line is defective.
If the system can not receive any signal from the col-
umn switch (windshield wiper and washer switch) 
due to a open circuit in the SWS communication line 
or other reasons, the system will enter the fail-safe 
mode when the ignition switch is at the "ACC" posi-
tion.

.

TROUBLESHOOTING HINTS

• The column switch (windshield wiper and washer 

switch) 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 Wiper Motor Drive Circuit