Mitsubishi Evolution X. Manual - part 838

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-35

INSPECTION PROCEDURE 3: Windshield wipers do not stop at the specified park position.

TECHNICAL DESCRIPTION (COMMENT)

If the windshield wipers do not stop at predetermined
park position, the windshield wiper motor or the
ETACS-ECU may be defective.

TROUBLESHOOTING HINTS

• The wiring harness or connectors may have

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

• The windshield wiper motor may be defective

• The ETACS-ECU may be defective

AC708843

WINDSHIELD
WIPER
MOTOR

WINDSHIELD
WIPER
AUTOMATIC
STOP RELAY

ETACS-ECU

Windshield Wiper Automatic Stop Relay Circuit

AC708948

Connector: A-06

A-06 (GR)

AC708972

Connector: C-304

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-36

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

STEP1. 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-06in 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

. Verify that the windshield wiper works

normally.

STEP 2. Check the windshield wiper motor.
(1) Disconnect windshield wiper motor connector A-06.
(2) Connect the vehicle battery to the windshield wiper motor

connector as shown, and operate the windshield wiper at
low speed. While the windshield wiper is working,
disconnect the battery at positions other than the specified
park position to stop the windshield wiper motor.

(3) When the battery is connected as shown, the motor should

run at low speed, and then stop at the specified park
position.

Q: Does the windshield wiper motor operate normally?

YES : Go to Step 3.
NO : Replace the windshield wiper motor. The windshield

wiper should now stop at the specified park position.

4 5

1 2

4 5

1 2

4 5

1 2

AC608788AB

(B) Automatic stop

(A) Low speed

Stop position check

WINDSHIELD WIPER AND WASHER

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EXTERIOR

51-37

STEP 3. 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 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 3 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 6.
NO : Go to Step 4.

STEP 4. 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 5.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

STEP 5. Check the wiring harness between ETACS-ECU
connector C-304 (terminals 8, 12) and windshield wiper
motor connector A-06 (terminals 3, 5).

• Check the output lines for open or short circuits.

Q: Is the wiring harness between ETACS-ECU connector

C-304 (terminals 8, 12) and windshield wiper motor
connector A-06 (terminals 3, 5) in good condition?
YES : Go to Step 6.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Cables and wire check

P.00E-12

STEP 6. Retest the system.
Check that the windshield wipers stops at the specified park
position.
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.

AC608254CL

Harness side: A-06

WINDSHIELD WIPER AND WASHER

TSB Revision

EXTERIOR

51-38

INSPECTION PROCEDURE 4: Windshield Wipers do not work normally.

TECHNICAL DESCRIPTION (COMMENT)

If either of the windshield wiper switch positions is
defective, the windshield 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

AC708844

WINDSHIELD
WIPER
MOTOR

CIRCUIT
BREAKER

WINDSHIELD
WIPER
SPEED
SWITCHING
RELAY

Windshield Wiper Motor Drive Circuit

ETACS-ECU

INPUT SIGNAL (COLUMN-ECU)

· WINDSHIELD WIPER HI SPEED SWITCH
· WINDSHIELD WIPER INTERMIT SWITCH
· WINDSHIELD WIPER LO SPEED SWITCH
· WINDSHIELD WIPER MIST SWITCH

AC708948

Connector: A-06

A-06 (GR)

AC708972

Connector: C-304

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