Mitsubishi Grandis. Manual - part 138

TROUBLESHOOTING

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-14

ECU CHECK

M1549014900446

1. Use the MUT-III and the SWS monitor to check 

ECUs.

2. The following ECUs can be checked by using the 

MUT-III and the SWS monitor.

NOTE: If a malfunction is found by the "ECU check", 
proceed "Symptom Procedure" (Refer to 

P.54C-44

).

SWS monitor-compatible ECUs and their conditions

AC310632BA

Connectors: C-14, C-16

C-16

C-14

C-14

C-16

<RHD>

AC310628AC

Connector: C-27 <RHD>

AC310205

AB

Connector: D-03 <RHD>

D-03(B)

AC310207

AB

Connector: D-16

AC310209

Connector: F-02

F-02(B)

AB

Harness side

AC310213

Connector: F-05

Harness side

<RHD>

10

1

6

14

5

12

13

4

11

7

2

3

8

9

F-05(B)

AB

AC310216

Connector: F-18

F-18(B)

AB

Harness side

AC310211

AB

Connector: F-26

Harness side

<RHD>

F-26(B)

TROUBLESHOOTING

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-15

NOTE: 

.

•

*1

: If "NG" is displayed beside the ETACS-ECU while the ignition switch is off, "NG" is also displayed 

beside the column-ECU.

•

*2

: If the MUT-III shows "NG" beside the ETACS-ECU, it also shows "NG" beside the power window main 

switch (power window module).

DATA LIST CHECK

M1549015000479

1. Use the MUT-III and the SWS monitor to check 

"DATA LIST." This "DATA LIST" check is 
applicable for signals, which are transmitted and 
received through the SWS communication line 
and the communication lines routed from one 
door to another. For the input signals which are 
not applicable for the SWS monitor check, refer 
to pulse check procedure 

P.54C-48

.

NOTE: If a problem is found in the "DATA LIST" 

check, refer to the Problems during Input Signal 
Check <Service data, function diagnosis or pulse 
check> (Refer to 

P.54C-48

).

2. The following input signals can be checked by 

using the MUT-III and the SWS monitor.

Item No.

ECUs to be checked Display on 

MUT-III

Normal 
condition

ECU conditions

Item 80

Column switch 
(column-ECU)

COLUMN ECU

OK

*1

All of the column switch, 
power supply, earth and 
interconnecting 
communication line are 
normal

Item 81

Multi-centre display

CENTRE DISP

NG

The MUT-III always displays 
"NG" due to CAN 
communication.

Item 83

ETACS-ECU

ETACS ECU

OK

All of the ETACS-ECU switch, 
power supply, earth and 
interconnecting 
communication line are 
normal

Item 84

Front-ECU

FRONT ECU

OK

*2

All of the front-ECU, power 
supply, earth and 
interconnecting 
communication line are 
normal

Item 85

Power window main 
switch (power window 
module)

P/W MODULE

OK

*2

 (when the 

ignition switch 
is ON)

All of the power window main 
switch, power supply, earth 
and interconnecting 
communication line are 
normal

Item 86

Sunroof motor 
assembly 
(sunroof-ECU)

SUNROOF ECU

OK

*2

All of the sunroof motor 
assembly, power supply, earth 
and interconnecting 
communication line are 
normal

−

Other SWS-related 
ECUs

Other ECUs

NG

ECUs are not used

TROUBLESHOOTING

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-16

DATA LIST REFERENCE TABLE
COLUMN SWITCH (COLUMN-ECU)

Item No. Check item

Display on 
MUT-III

Check condition

Normal condition

00

Headlamp 
switch

HEADLAMP 
SW

lighting switch: HEAD

ON

lighting switch: Other than HEAD

OFF

01

Tail lamp 
switch

TAIL LAMP SW Lighting switch: TAIL

ON

Lighting itch: OFF

OFF

02

Dimmer 
switch

DIMMER SW

Dimmer switch: ON

ON

Dimmer switch: OFF

OFF

03

Passing lamp 
switch

PASSING SW

Passing lamp which: ON

ON

Passing lamp which: OFF

OFF

05

Windshield 
intermittent 
wiper switch

INT WIPER SW Wiper switch: INT

ON

Wiper switch: Other than INT

OFF

06

Windshield 
low-speed 
wiper switch

LO WIPER SW Wiper switch: LO

ON

Wiper switch: Other than LO

OFF

07

Windshield 
high-speed 
wiper switch

HI WIPER SW

Wiper switch: HI

ON

Wiper switch: Other than HI

OFF

08

Wind shield 
mist wiper 
switch

MIST WIPER 
SW

Wiper switch: Mist

ON

Wiper switch: Other than mist

OFF

09

Windshield 
washer 
switch

FRONT WASH. 
SW

Windshield washer switch: ON

ON

Windshield washer switch: OFF

OFF

10

Turn-signal 
lamp switch 
(RH)

TURN SIG. RH Turn-signal lamp switch: RH

ON

Turn-signal lamp switch: Other than RH

OFF

11

Turn-signal 
lamp switch 
(LH)

TURN SIG. LH Turn-signal lamp switch: LH

ON

Turn-signal lamp switch: Other than LH

OFF

13

Rear wiper 
switch

REAR WIPER 
SW

Rear wiper switch: INT

ON

Rear wiper switch: Other than INT

OFF

14

Rear washer 
switch

REAR WASH. 
SW

Rear wiper switch: Washer

ON

Rear wiper switch: Other than washer

OFF

15

With or 
without 
windshield 
intermittent 
wiper control

INT WIP KNOB Vehicles with intermittent wiper control

EQUIP

Vehicles without intermittent wiper control

NONE

16

Headlamp 
washer 
switch

HD WASHER 
SW

Headlamp washer switch: ON

ON

Headlamp washer switch: OFF

OFF

TROUBLESHOOTING

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-17

ETACS-ECU

Item No. Check item

Display on 
MUT-III

Check condition

Normal condition

30

Ignition 
switch (IG1)

IG SW(IG1)

Ignition switch: ON or START

ON

Ignition switch: LOCK (OFF) or ACC

OFF

31

Ignition 
switch (ACC)

IG SW(ACC)

Ignition switch: ACC or ON

ON

Ignition switch: LOCK (OFF) or START

OFF

32

Driver's door 
switch

DR DOOR SW Driver's door switch ON (The driver’s door 

is open).

ON

Driver's door switch OFF (The driver's door 
is closed).

OFF

33

Reception of 
power 
window 
switch

P/W SW 
ACCEPT

Ignition switch: ON or START

PERMIT

Ignition switch: from ON or START to LOCK 
(OFF) or ACC

from PERMIT to 
PROHIBIT (after 
approximately 30 
seconds)

34

Multimode 
keyless entry 
system

KEYLESS 
ENTRY

1. Keyless entry transmitter LOCK switch: 

ON

2. Turn ON the keyless entry transmitter 

LOCK switch again (For the second 
switch operation, hold pressing the 
switch for at least one second within 30 
seconds after the switch is turned on at 
first)

Multi-close (only 
momentarily when 
switch is operated)

Other than the conditions above

WAITING

35

Headlamp 
automatic-sh
utdown 
function

HD AUTO-CUT 1. Lighting switch: Other than OFF

2. Ignition switch: from ON or START to 

LOCK (OFF) or ACC

3. Driver's door switch: ON (driver's door 

open)

OFF to ON (after 
approximately one 
second)

When requirements for the headlamp 
automatic-shutdown are not satisfied

OFF

36

Request of 
fog lamp 
illumination

F.FOG LAMP

1. Lighting switch: "TAIL" or "HEAD"
2. Fog lamp switch: ON

ON

Other than the conditions above

OFF

37

Windshield 
intermittent 
wiper interval

INT WIPE 
TIME

1. Ignition switch: ACC or ON
2. Operate the intermittent wiper control, 

and change the wiper interval

The MUT-III 
displays 
intermittent wiper 
interval in 
response to the 
intermittent wiper 
control positions

41

Back-up 
lamp switch

INHIBITOR SW Back-up lamp switch <M/T> or inhibitor 

switch <A/T>: ON

ON

Back-up lamp switch <M/T> or inhibitor 
switch <A/T>: OFF

OFF