Mitsubishi Evolution X. Manual - part 840

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-43

STEP 12. Measure the voltage at the A-06 windshield wiper 
motor connector.
(1) Disconnect the connector, and measure the voltage at the 

wiring harness side.

(2) Ignition switch: ACC
(3) Windshield wiper switch: HI,MIST
(4) Measure the voltage between A-06 windshield wiper motor 

connector terminal No.4 and body ground.

OK: Battery voltage

Q: Is the check result normal?

YES : Intermittent malfunction (Refer to GROUP 00 

− How 

to Use Troubleshooting/Inspection Service Points - 
How to Cope with Intermittent Malfunction 

P.00-15

).

NO :  Go to Step 13.

STEP 13. Check ETACS-ECU connector C-304 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 14.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the windshield wiper operates 

normally when the windshield wiper switch is moved 
to each position.

STEP 14. Check the wiring harness wires between C-304 
ETACS-ECU connector terminal No. 5 and A-05 windshield 
wiper motor connector terminal No.4.

• Check the output lines for open or short circuit.

Q: Is the check result normal?

YES : Go to Step 15.
NO :  Repair the wiring harness.

STEP 15. Retest the system.
Check that the windshield wipers work normally by moving the 
switch to each position.
Q: Is the check result normal?

YES : Intermittent malfunction (Refer to GROUP 00 

− How 

to Use Troubleshooting/Inspection Service Points - 
How to Cope with Intermittent Malfunction 

P.00-15

).

NO :  Replace the ETACS-ECU.

AC608254

AC608254 CS

Harness side: A-06

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-44

INSPECTION PROCEDURE 5: The windshield intermittent wiper interval cannot be adjusted by 
operating the windshield intermittent wiper interval control switch.

.

TECHNICAL DESCRIPTION (COMMENT)

If the windshield intermittent wiper interval is not 
changed by operating the windshield intermittent 
wiper interval adjusting knob or according to the 
vehicle speed, the column 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 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

AC609166

Windshield Intermittent Wiper Control Circuit

ETACS-ECU

LIN 
COMMUNICATION
LINE

COLUMN-ECU

INPUT SIGNAL

WINDSHIELD INTERMITTENT
WIPER INTERVAL
ADJUSTING KNOB

CAN COMMUNICATION
LINE (CAN_H LINE)

CAN COMMUNICATION
LINE (CAN_L LINE)

ASC-ECU

INPUT SIGNAL

VEHICLE SPEED

AD

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-45

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, "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 2.

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 windshield wiper opera-
tion.

• Ignition switch: ACC

• Rotate the windshield wiper interval control from (+) to (−) 

side.

OK: Normal condition is displayed.

Q: Is the check result normal?

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

Item No.

Display on 
scan tool

Check 
conditions

Normal 
condition

Item 359

Front wiper 
(interval 
volume)

Rotate the 
windshield 
wiper 
interval 
control 
from (+) to 
(

−) side.

Value 
changes 
from (+) to 
254 (

−)

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-46

NO :  Go to Step 4.
YES : Replace the column switch.

STEP 4. Retest the system.
Check that the windshield wiper interval changes when the 
windshield wiper interval control is rotated.
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.

INSPECTION PROCEDURE 6: The windshield intermittent wiper interval is not changed according to 
the vehicle speed.

.

TECHNICAL DESCRIPTION (COMMENT)

If the intermittent wiper interval does not depend on 
the vehicle speed, the input circuit of the vehicle 
speed signal and the ETACS-ECU may be defective. 
Alternatively, the vehicle speed-dependent wiper 
may be set to "disabled" by using the configuration 
function.

.

TROUBLESHOOTING HINTS

• The wiring harness or connectors may have 

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

• The combination meter 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

AC609166

Windshield Intermittent Wiper Control Circuit

ETACS-ECU

LIN 
COMMUNICATION
LINE

COLUMN-ECU

INPUT SIGNAL

WINDSHIELD INTERMITTENT
WIPER INTERVAL
ADJUSTING KNOB

CAN COMMUNICATION
LINE (CAN_H LINE)

CAN COMMUNICATION
LINE (CAN_L LINE)

ASC-ECU

INPUT SIGNAL

VEHICLE SPEED

AD