Mitsubishi Outlander GS45X. Manual - part 1353

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-35

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CIRCUIT OPERATION

• The windshield wiper and washer switch sends a 

signal through the column-ECU (incorporated in 
the column switch) to the ETACS-ECU. If the col-
umn-ECU sends a windshield wiper and washer 
switch "ON" signal to the ETACS-ECU, the 
ETACS-ECU turns on the relay (incorporated in 
the ETACS-ECU), thus causing the windshield 
wiper and washer motor to be turned on.

• If the LIN communication line is defective, the 

ETACS-ECU operates windshield wiper motor by 
using the other communication lines (wiper 
backup circuit) instead of that line. In this case, 
the windshield wiper works at low speed regard-
less of the windshield wiper and washer switch 
positions ("LO" or "HIGH").

.

TECHNICAL DESCRIPTION (COMMENT)

If the windshield wiper does not work at all, the wind-
shield wiper motor, column switch (windshield wiper 
and washer switch) or the ETACS-ECU may be 
defective.

.

TROUBLESHOOTING HINTS

• Trouble in input signal system

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

• The wiper motor may be defective

• The column switch may be defective

• The ETACS-ECU may be defective

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

AC901214

Connector: A-08

AB

ACA02655AK

Connectors: C-304, C-309

C-309 (B)

C-304

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-36

STEP 1. Use the scan tool MB991958 to check if an 
ETACS-related diagnostic trouble code is set. 
Connect the scan tool. Refer to GROUP 54A ETACS, "Diag-
nostic function 

P.54A-729

."

Q: Is the diagnostic trouble code set?

YES : Diagnose the ETACS-ECU. Refer to GROUP 54A 

ETACS, "Diagnostic trouble code chart 

P.54A-732

."

NO :  Go to Step 2.

STEP 2. Check the input signal related to the windshield 
wiper operation.

• Ignition switch: ACC

OK: Normal condition is displayed.

Q: Is the check result normal?

NO :  Go to Step 3.
YES : Refer to GROUP 54A 

− ETACS, Input signal 

procedures 

P.54A-785

.

STEP 3. Check windshield wiper motor connector A-08 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is windshield wiper motor connector A-08 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

. Verify that the windshield wiper works 

normally.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

Item No.

Item name

Normal condition

Item 288

ACC switch

ON

Item 235

Front wiper ACT

ON

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-37

STEP 4. Check the windshield wiper motor.
(1) Disconnect windshield wiper motor connector A-08.
(2) Connect a battery to the windshield wiper motor as shown. 

Then check that the windshield wiper motor operates 
normally at high and low speeds.

Q: Does the windshield wiper motor operate normally?

YES : Go to Step 5.
NO :  Replace the windshield wiper motor. Verify that the 

windshield wiper works normally.

STEP 5. Check the ground circuit to the windshield wiper 
motor. Measure the resistance at the windshield wiper 
motor connector A-08.
(1) Disconnect windshield wiper motor connector A-08 and 

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

(2) Measure the resistance value between terminal 5 and 

ground.

• The resistance should be 2 Ω or less.

Q: Is the measured resistance 2 

Ω or less?

YES : Go to Step 7.
NO :  Go to Step 6.

STEP 6. Check the wiring harness between windshield 
wiper motor connector A-08 (terminal 5) and ground.
Q: Is the wiring harness between windshield wiper motor 

connector A-08 (terminal 5) 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 the 
windshield wiper works normally.

4

5

3

1 2

4

5

3

1 2

4

5

3

1 2

AC702469 AB

High speed

Operation check

Low speed

AC702473AB

 A-08

Harness side:

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-38

STEP 7. Check ETACS-ECU connector C-309 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is ETACS-ECU connector C-304 in good condition?

YES : Go to Step 8.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the windshield wiper works 

normally.

STEP 8. Measure the voltage at ETACS-ECU connector 
C-309.
(1) Disconnect ETACS-ECU connector C-309 and measure the 

resistance available at the wiring harness side of the 
connector.

(2) Measure the voltage between terminal 1 and ground.

• The voltage should measure approximately 12 volts 

(battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery 

positive voltage)?
YES : Go to Step 10.
NO :  Go to Step 9.

STEP 9. Check the wiring harness between ETACS-ECU 
connector C-309 (terminal 1) and the fusible link (34).

• Check the power supply line for open circuits.

Q: Is the wiring harness between ETACS-ECU connector 

C-309 (terminal 1) and the fusible link (34) in good 
condition?
YES : Intermittent malfunction. Refer to GROUP 00, How to 

cope with intermittent malfunction 

P.00-15

. 

NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Cables and wire check 

P.00E-12

. 

STEP 10. Check the wiring harness between ETACS-ECU 
connector C-304 (terminals 5, 6) and windshield wiper 
motor connector A-08 (terminals 1, 4).

• Check the input and output lines for open or short circuit.

Q: Is the wiring harness between ETACS-ECU connector 

C-304 (terminals 5, 6) and windshield wiper motor 
connector A-08 (terminals 1, 4) in good condition?
YES : Go to Step 11.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Cables and wire check 

P.00E-12

. 

AC702474

Connector C-309

AD

(harness side)