Mitsubishi Grandis. Manual - part 230

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-382

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector E-11 and junction block 
connector C-211, and repair if necessary.

• Check the power supply line for open circuit.

Q: Is the check result normal?

YES : 

Replace the ETACS-ECU.

NO : 

Repair the wiring harness.

AC310626

Connector: C-219

Junction block (Rear view)

<LHD>

AB

Junction block side

AC310620

Connector: C-219

Junction block 
(Rear view)

<RHD>

AB

Junction block side

AC310652

AB

Connectors: E-02, E-11

Harness side

E-02

E-11

E-02

E-11

<Vehicles with 
sunroof-LHD>

AC310656

AB

Connectors: E-02, E-11

Harness side

E-02

E-11

E-02

E-11

<Vehicles with 
sunroof-RHD>

AC310623

AC310623

Connector: C-211

AQ

<LHD>

Junction block (Front view)

Harness side

3

1

2

AC310618

AC310618

Connector: C-211 <RHD>

AS

Harness side

Junction block (Front view)

3

1

2

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-383

Inspection Procedure P-2: The room lamp does not illuminate normally. <Vehicles with keyless entry>

CAUTION

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

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-384

COMMENTS ON TROUBLE SYMPTOM

If the room lamp does not illuminate or extinguish 
normally, wiring harness connector(s) or the bulb 
may be defective.

POSSIBLE CAUSES

• Malfunction of the interior lamp switches

• Malfunction of the room lamp bulbs

• Malfunction of the rear personal lamp bulbs

• Damaged harness wires and connectors

ETACS-ECU

J/B SIDE

ROOM LAMP

INTERIOR
LAMP
SWITCH

REAR
PERSONAL
LAMP

FOR
SECOND
SEAT: LH

REAR
PERSONAL
LAMP

FOR
SECOND
SEAT: RH

REAR
PERSONAL
LAMP

FOR
THIRD
SEAT: LH

REAR PERSONAL LAMP
(FOR THIRD SEAT: RH)

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

Room Lamp and Rear Personal Lamp Circuit

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-385

DIAGNOSTIC PROCEDURE

Step 1. SWS monitor data list
<Selected item> ETACS ECU

• Driver's door is open

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Refer to inspection procedure Q-5 "The 
driver's door switch signal is not received 
<LH drive vehicles>

P.54C-474

  or <RH 

drive vehicles>

P.54C-476

 ."

Step 2. ETACS switch data by using the SWS 
monitor

Check the ETACS-ECU signal related to the room 
lamp illumination.

• Ignition switch: OFF (key inserted)

• Passenger’s door: Close → Open

• Tailgate: Close → Open

• Rear door (RH): Close → Open

• Rear door (LH): Close → Open

• Driver’s door: Unlock → Lock

• Room lamp on switch: ON

• Room lamp off switch: ON

OK: Normal conditions displayed for all the 
items.

Q: Is the check result normal?

Item No.

Item name

Normal 
condition

Item 32

DR DOOR SW

ON

Item No.

Item name

Normal 
condition

Item 03

KEY REMINSW

OFF

Item No.

Item name

Normal 
condition

Item 05

PASS DOOR SW

from OFF 
to ON

Item No.

Item name

Normal 
condition

Item 07

TRK LID LA SW

from OFF 
to ON

Item No.

Item name

Normal 
condition

Item 41

R.DOOR(RH) SW

from OFF 
to ON

Item No.

Item name

Normal 
condition

Item 42

R.DOOR(LH) SW

from OFF 
to ON

Item No.

Item name

Normal 
condition

Item 21

DR DOR LOK SW

from OFF 
to ON

Item 22

DR DOR ULOK SW

from ON 
to OFF

Item No.

Item name

Normal 
condition

Item 31

RM LMP ON SW

ON

Item No.

Item name

Normal 
condition

Item 32

RM LMP OFF SW

ON