Mitsubishi Grandis. Manual — part 52

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-205

WINDSHIELD WIPER AND WASHER

Inspection Procedure G-1: The windshield wipers does not work at all.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

The windshield wiper motor, the column switch or the
front-ECU may be defective.

POSSIBLE CAUSES

• Malfunction of the windshield wiper motor

• Malfunction of the column switch

Windshield Wiper Power Supply Circuit

FRONT-ECU

WINDSHIELD
WIPER MOTOR

WIPER SPEED
SWITCHING
RELAY

CIRCUIT
BREAKER

IGNITION
SWITCH (ACC)

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-206

• Malfunction of the front-ECU

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. MUT-III diagnosis code
When the ignition switch is turned to the LOCK
(OFF) position, check that the ETACS-ECU does not
set the diagnosis code.

Q: Is the diagnosis code set?

YES :

Refer to diagnosis code chart

P.54B-29

.

NO :

Go to Step 2.

Step 2. Pulse check.
Check the input signals below which are related to
the windshield wiper.

OK: The MUT-III sounds or the voltmeter
needle fluctuates.

Q: Are the check result normal?

All the signals are received normally :

Go to Step

3.

The ignition switch (ACC) signal is not received. :

Refer to inspection procedure Q-1 "The
ignition switch (ACC) signal is not received

P.54B-416

."

Windshield mist wiper switch signal is not
received. :

Refer to inspection procedure Q-7 "The

column switch (windshield wiper washer
and rear wiper washer switch) signal is not
received

P.54B-439

."

Step 3. Connector check: A-01 windshield wiper
motor connector.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the connector.

Step 4. Check the windshield wiper motor
assembly.
Refer to GROUP 51

− Windshield wiper

P.51-25

.

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Replace the windshield wiper motor
assembly.

System switch

Check condition

Ignition switch (ACC)

When turned from the
LOCK (OFF) position to
the ACC position.

Windshield mist wiper
switch

When the switch is
turned from off to on.

AC310401

Connector: A-01 <LHD>

Harness side

AD

A-01 (GR)

AC310396

Connector: A-01 <RHD>

Harness side

AD

A-01 (GR)

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-207

Step 5. Resistance measurement at the A-01
windshield wiper motor connector.

(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Continuity between A-01 windshield wiper motor

connector terminal No.2 and body earth

OK: 2

Ω or less

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Go to Step 6.

Step 6. Connector check: A-40 earth connector

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Repair the connector.

AC310401

Connector: A-01 <LHD>

Harness side

AD

A-01 (GR)

AC310396

Connector: A-01 <RHD>

Harness side

AD

A-01 (GR)

AC310506

4

1

2

5

3

Connector A-01
(Harness side)

BN

AC310401

Connector: A-40 <LHD>

Harness side

AE

A-40 (GR)

AC310396

Connector: A-40 <RHD>

Harness side

AE

A-40 (GR)

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-208

Step 7. Check the wiring harness between A-01
windshield wiper motor connector terminal No.2
and A-40 earth connector terminal No.5.

• Check the earth wires for open circuit.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

Cope with Intermittent Malfunction

P.00-5

).

NO :

Repair the wiring harness.

Step 8. Connector check: A-15X front-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 9.

NO :

Repair the connector.

Step 9. Voltage measurement at the A-15X
front-ECU connector.

(1) Remove the front-ECU, and measure at the relay

box side.

(2) Ignition switch: ACC

(3) Check the voltage between the A-15X front-ECU

connector terminal No.24 and body earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 11.

NO :

Go to Step 10.

AC310402

AC

Connectors: A-01, A-40

A-01 (GR)

A-01

Harness side

A-40 (GR)

A-40

Harness side

<LHD>

AC310397

AC

Connectors: A-01, A-40

A-01 (GR)

A-01

Harness side

A-40 (GR)

A-40

Harness side

<RHD>

AC311521AC

Connector: A-15X

Relay box side

21

22

23

24

25

26

27

28

29

30

31

AC311521AC

Connector: A-15X

Relay box side

21

22

23

24

25

26

27

28

29

30

31

AC310507

Connector A-15X
(Relay box side)

BX

21

22

23

24

25

26

27

28

29

30

31