Mitsubishi Evolution X. Manual - part 841

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-47

STEP 1. Retest the system.
Check that the windshield intermittent wiper interval can be 
adjusted by operating the windshield intermittent wiper interval 
control switch.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Refer to Inspection Procedure 5 "The windshield 

intermittent wiper interval cannot be adjusted by 
operating the windshield intermittent wiper interval 
control switch" 

P.51-44

.

STEP 2. Check the ETACS configuration function.
Use the ETACS configuration function to check that "Front 
wiper operation" is set to "Variable INT" or "Speed sensitive".
Q: Is the check result normal?

YES : Go to Step 3.
NO :  Use the ETACS configuration function to set "Front 

wiper operation" to "variable INT" or "Speed 
sensitive". (Refer to 

P.51-65

.)

STEP 3. Using scan tool MB991958, check data list. 
Check the input signal related to the combination meter.

• Drive the vehicle and  change vehicle speed.

Q: Is the check result normal?

YES : Go to Step 4.
NO <Normal condition is not displayed for item No. 80.> 
: 

Troubleshoot the speedometer (Refer to GROUP 54A 
−The combination meter, Diagnosis - Inspection 

Procedure 2: "The speedometer does not work (the 
other meters work).”

P.54A-65

)

STEP 4. Retest the system.
Check that the intermittent wiper interval depends on the vehi-
cle speed.
Q: Is the check result normal?

YES : Intermittent malfunction. Refer to GROUP 00, How to 

cope with intermittent malfunction 

P.00-15

. 

NO :  Replace the ETACS-ECU.

Item No.

Display on 
scan tool

Check 
condition

Normal 
condition

Item 80

speedometer

Speedometer and scan 
tool displays meet

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-48

INSPECTION PROCEDURE 7: The rain sensitive AUTO wiper function does not work at all <Vehicles 
with lighting control sensor>.

CAUTION

Whenever ECU is replaced, ensure that the input and output signal circuits are normal.

AC708845

30

30A

8

7.5A

8

LIGHTING
CONTROL
SENSOR

LIN DRIVE
CIRCUIT

ETACS-ECU

AB

INTERFACE
CIRCUIT

Raindrops Sensing Wiper Function Control Circuit 

36

FUSIBLE LINK 

      

AC708950

Connector: C-133

AF

AC708972AG

Connectors: C-307, C-316, C-317

Junction block

C-317

C-307

C-316

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-49

.

CIRCUIT OPERATION

When the column switch is in the AUTO position, this function 
automatically adjusts the wiping speed of windshield wiper by 
detecting the rain fall through lighting control sensor.

.

TECHNICAL DESCRIPTION (COMMENT)

The windshield wiper motor, the column switch, the lighting 
control sensor, the harness connector, or the ETACS-ECU may 
be defective.

.

TROUBLESHOOTING HINTS

• Defective column switch (column-ECU)

• Malfunction of the lighting control sensor

• Defective windshield wiper motor

• Malfunction of ETACS-ECU

• Damaged wiring harness and connectors

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

STEP 1. Lighting control sensor installation surface check
Visually check the presence of scratches or air bubbles (diame-
ter of 5 mm or more) on the windshield to which the lighting 
control sensor is installed.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Replace the windshield (Refer to GROUP 42A 

− 

Windshield Removal and Installation 

P.42A-19

).

STEP 2. Windshield wiper operation check
Check that the windshield wipers work normally.
Q: Is the check result normal?

YES : Go to Step 3.
NO :  Refer to trouble symptom chart 

P.51-23

.

AC708954 AI

Connector: D-02

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-50

STEP 3. 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, "How to 
connect the scan tool (M.U.T.-III) 

P.54A-579

."

Q: Is the diagnostic trouble code set?

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

ETACS, "Diagnostic trouble code chart 

P.54A-582

."

NO :  Go to Step 4.

STEP 4. Using scan tool MB991958, read the lighting 
control sensor diagnostic trouble code.
Check if a lighting control sensor diagnostic trouble code is set.
Connect the scan tool. Refer to GROUP 54A ETACS, "How to 
connect the scan tool (M.U.T.-III) 

P.54A-579

."

Q: Is the diagnostic trouble code set?

YES : Diagnose the lighting control sensor. [Diagnostic 

Trouble Code: (Refer to GROUP 54A 

− Diagnosis 

Code Chart 

P.54A-107

) or Service Data (

P.51-64

).]

NO :  Go to Step 5.

STEP 5. Connector check: D-02 Lighting control sensor 
connector
Q: Is the check result normal?

YES : Go to Step 6.
NO :  Repair the damaged connector.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB