Mitsubishi Evolution X. Manual - part 835

WINDSHIELD WIPER AND WASHER

TSB Revision

EXTERIOR

51-23

WINDSHIELD WIPER AND WASHER DIAGNOSIS

STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING

M1511014600318

Refer to GROUP 00 

− Contents of Troubleshooting 

P.00-7

.

TROUBLE SYMPTOM CHART

M1511015000762

MB991223

a. MB991219
b. MB991220
c. MB991221
d. MB991222

Harness set

a. Test harness
b. LED harness
c. LED harness 

adaptor

d. Probe

General service tools Continuity check and voltage 

measurement at harness wire or 
connector for loose, corroded or 
damaged terminals, or terminals 
pushed back in the connector.

a. Connector pin contact 

pressure inspection

b. Power circuit inspection
c. Power circuit inspection
d. Commercial tester connection

MB992006
Extra fine probe

−

Making voltage and resistance 
measurement during 
troubleshooting

Tool

Tool number and 
name

Supersession

Application

MB991223

a

d

c

b

DO NOT USE

BF

MB992006

AB

TROUBLE SYMPTOM

Inspection 
procedure 
No.

Reference 
page

The windshield wipers do not work at all.

1

P.51-25

The windshield wipers do not work when the wiper switch is at "INT", "Washer" 
or "Mist" position. However, wipers work at low speed when switch is at "Lo" or 
"Hi" position.

2

P.51-32

Windshield wipers do not stop at specified park position.

3

P.51-35

Windshield wipers do not work normally.

4

P.51-38

The windshield intermittent wiper interval cannot be adjusted by operating the 
windshield intermittent wiper volume control switch.

5

P.51-44

The windshield intermittent wiper interval is not changed according to the 
vehicle speed.

6

P.51-46

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

7

P.51-48

The rain sensitive AUTO wiper function works even though there is no rainfall 
<Vehicles with lighting control sensor>.

8

P.51-53

WINDSHIELD WIPER AND WASHER

TSB Revision

EXTERIOR

51-24

NOTE: Even when the ETACS-ECU has failed, the 
windshield wipers can work at low speed as fail-safe 
mode. 

Sometimes the rain sensitive AUTO wiper function works even though there is 
no rainfall <Vehicles with lighting control sensor>.

9

P.51-56

The windshield washer does not work normally.

10

P.51-59

TROUBLE SYMPTOM

Inspection 
procedure 
No.

Reference 
page

WINDSHIELD WIPER AND WASHER

TSB Revision

EXTERIOR

51-25

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: The windshield wipers do not work at all.

ACC
RELAY3

AC708840

WINDSHIELD
WIPER
MOTOR

WINDSHIELD
WIPER
AUTOMATIC
STOP RELAY

CIRCUIT
BREAKER

WINDSHIELD
WIPER
SPEED
SWITCHING
RELAY

ETACS-ECU

Windshield Wiper Power Supply Circuit

FUSIBLE
LINK

34

AB

WINDSHIELD WIPER AND WASHER

TSB Revision

EXTERIOR

51-26

.

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

AC708948

Connector: A-06

A-06 (GR)

AD

AC708972

Connectors: C-304, C-309

AE

C-309 (B)

C-304