Mitsubishi Montero (2004+). Manual — part 748

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-249

.

TECHNICAL DESCRIPTION (COMMENT)
If the windshield wiper does not stop at predeter-
mined park position, the windshield wiper motor or
the front-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The windshield wiper motor 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 Tool:

• MB991223: Harness Set

STEP 1. 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 2.
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 AB

CONNECTOR: B-12

B-12 (B)

AC204170

CONNECTOR : D-28

BB

ACX02285

CONNECTORS: D-208, D-221

AI

D-208

JUNCTION BLOCK (FRONT VIEW)

D-221

AC205116 AD

CONNECTOR: B-12

B-12 (B)

(HARNESS SIDE)

B-12 (B)

1

2

3

4

5

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-250

STEP 2. 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 3.
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

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-251

STEP 3. 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 4.

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

AC205116 AD

CONNECTOR: B-12

B-12 (B)

(HARNESS SIDE)

B-12 (B)

1

2

3

4

5

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

SIMPLIFIED WIRING SYSTEM (SWS)

54B-252

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.

STEP 5. 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 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.

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

AC204183

CONNECTOR : A-08X

AC

22

23

21

26 25

27

28

31 30 29

24

RELAY BOX SIDE

A-08X