Mitsubishi Grandis. Manual - part 58

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-229

Step7. Check the wiring harness between A-34 
windshield washer motor connector terminal 
No.1 and A-15X front-ECU connector terminal 
No.21.

• Check the power supply line to the ignition switch 

(ACC) for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the wiring harness.

Step 8. Retest the system.

The windshield washer should now work normally.

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 : 

Replace the front-ECU.

AC311521AC

Connector: A-15X

Relay box side

21

22

23

24

25

26

27

28

29

30

31

AC310401

Connector: A-34 <LHD>

Harness side

A-34 (GR)

AF

AC310396

Connector: A-34 <RHD>

Harness side

A-34 (GR)

AF

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-230

REAR WIPER AND WASHER

INSPECTION PROCEDURE H-1: The rear wiper 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

If the rear wiper does not work normally, the input 
signal circuits to the components below, the rear 
wiper motor or the ETACS-ECU may be defective.

• Ignition switch (ACC)

• Rear wiper switch

POSSIBLE CAUSES

• Malfunction of the rear wiper motor

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

IGNITION
SWITCH (ACC)

REAR
WIPER RELAY

REAR
WIPER MOTOR

ETACS-ECU

J/B SIDE

REAR WIPER SWITCH

INPUT SIGNAL

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

Rear Wiper Drive Circuit

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-231

DIAGNOSTIC PROCEDURE

Step 1. Use the MUT-III to confirm a diagnosis 
code.
Check that the ETACS-ECU sets a diagnosis code.

Q: Is 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 rear 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.54C-456

."

The column switch (rear 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: G-05 rear wiper motor 
connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the connector.

Step 4. Check the rear wiper motor.
Refer to GROUP 51 

− Rear wiper and washer 

P.51-32

.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the rear wiper motor.

Step 5. Resistance measurement at the G-05 rear 
wiper motor connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between G-05 rear wiper motor 

connector terminal No.4 and body earth

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 6.

System switch

Check condition

Ignition switch (ACC)

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

Column switch (rear 
wiper switch)

When the switch is 
turned from off to on

AC310222

Connector: G-05 

AH

Harness side

AC310222

Connector: G-05 

AH

Harness side

AC310506

Connector G-05
(Harness side)

BS

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-232

Step 6. Check the wiring harness between G-05 
rear wiper motor connector terminal No.4 and 
body earth.

• Check the earth line for open or short 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 7. Connector check: C-219 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the connector.

AC310222

Connector: G-05 

AH

Harness side

AC310626AD

Connector: C-219 <LHD>
Junction block (Rear view)

Junction block side

AC310620

Connector: C-219

Junction block 
(Rear view)

<RHD>

AB

Junction block side