Mitsubishi Montero (2002-2004). Manual - part 301

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-251

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check the windshield wiper motor.
(1) Disconnect windshield wiper motor connector B-12.
(2) Connect the windshield wiper motor connector terminal 4 to 

the positive battery terminal and terminal 5 to the ground as 
shown in the illustration (A), and operate the windshield 
wiper at low speed. While the windshield wiper is working, 
disconnect the battery at positions other than the 
predetermined park position to stop the windshield wiper 
motor.

(3) When connect the windshield wiper motor connector 

terminal 2 to the positive battery terminal, terminal 5 to the 
ground and terminal 3 to terminal 4 as shown in the 
illustration (B), the motor should run at low speed, and then 
stop at the predetermined park position.

Q: Does the windshield wiper motor operate normally?

YES : Go to Step 2.
NO :  Replace the windshield wiper motor. Verify the 

windshield wiper should now stop at the 
predetermined park position.

AC203856

1

4

2

3

5

1

4

2

3

5

1

4

2

3

5

AB

STOP POSITION CHECK

(B) AUTOMATICAL STOP

(A) LOW SPEED

B-12 (B)

CONNECTOR: B-12 (B)

B-12 (B)

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-252

STEP 2. Check the battery power supply circuit to the 
windshield wiper motor. Test at the windshield wiper motor 
connector B-12. 
(1) Disconnect windshield wiper motor connector B-12 and 

measure the voltage available at the wiring harness side of 
the connector. 

(2) Turn the ignition switch to the "ACC" position.

(3) Measure the voltage between terminal 2 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 5.
NO :  Go to Step 3.

STEP 3. Check windshield wiper motor connector B-12 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector. 
Q: Is windshield wiper motor connector B-12 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

. The windshield wiper should now stop at the 

predetermined park position.

AC205116 AC

CONNECTOR: B-12

B-12 (B)

B-12 (B)

3

2

1

5

4

AC001206

CONNECTOR B-12
(HARNESS SIDE)

AB

AC205116 AD

CONNECTOR: B-12

B-12 (B)

(HARNESS SIDE)

B-12 (B)

1

2

3

4

5

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-253

STEP 4. Check the wiring harness between windshield 
wiper motor connector B-12 and the ignition switch (ACC).

NOTE: Also check intermediate connector A-05, D-28, junction 
block connectors D-208 and D-221 for loose, corroded, or dam-
aged terminals, or terminals pushed back in the connector. If 
intermediate connector A-05, D-28, junction block connector D-
208 and D-221 is damaged, repair or replace the damaged 
component(s) as described in GROUP 00E, Harness Connec-
tor Inspection 

P.00E-2

.

Q: Is the wiring harness between windshield wiper motor 

connector B-12 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(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.

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)

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

SWS SYMPTOM PROCEDURES

54Bb-254

STEP 5. Check windshield wiper motor connector B-12 and 
front-ECU connector A-08X for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are windshield wiper motor connector B-12 and front-

ECU connector A-08X in good condition?
YES : Go to Step 6.
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. Refer to 
GROUP 00E, Harness Connector Inspection 

P.00E-

2

. 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)