Mitsubishi Evolution X. Manual — part 836

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-27

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. Using scan tool MB991958, check data list.
Check the input signal related to the windshield wiper. opera-
tion.

• Ignition switch: ACC

• Operate the windshield wiper switch at each switch posi-

tion.

OK: Normal condition is displayed.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

Item No.

Item name

Windshield
wiper
switch
position

Normal
condition

Item 235

Front wiper
ACT

LO

ON

HI

INT

ON and
OFF

MIST

ON

Item 288

ACC switch

ON

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-28

Q: Is the check result normal?

YES <Normal conditions are displayed for all items> :

Go to Step 3.

NO <Normal condition is not displayed for item No. 235>
:

Troubleshoot the ETACS-ECU. Refer to ETACS,
Diagnosis - Inspection Procedure 12 "ETACS-ECU
does not receive any signal from the column switch
signal."

P.54A-639

.

NO <Normal condition is not displayed for item No. 288>
:

Refer to GROUP 54A, ETACS, Diagnosis

−

Inspection Procedure 1 "The ignition switch (ACC)
signal is not received"

P.54A-640

.

STEP 3. Check windshield wiper motor connector A-06 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is windshield wiper motor connector A-06 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.

STEP 4. Check the windshield wiper motor.
(1) Disconnect windshield wiper motor connector A-06.
(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.

4 5

3

1 2

4 5

3

1 2

4 5

3

1 2

AC608787AB

Operation check

Low speed

High speed

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-29

STEP 5. Check the ground circuit to the windshield wiper
motor. Measure the resistance at the windshield wiper
motor connector A-06.
(1) Disconnect windshield wiper motor connector A-06 and

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

(2) Measure the resistance value between terminal 2 and

ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

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

STEP 6. Check the wiring harness between windshield
wiper motor connector A-06 (terminal 2) and ground.
Q: Is the wiring harness between windshield wiper motor

connector A-06 (terminal 2) 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.

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-309 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.

AC608255BQ

Harness side: A-06

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-30

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 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 11.
NO : Repair the damaged connector.

AC608254 CP

Harness side: C-309