Mitsubishi Grandis. Manual - part 242

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-430

Step 7. Connector check: C-219 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the defective connector.

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

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-431

Step 8. Check the wiring harness from C-219 
ETACS-ECU connector terminal No.6 to G-12 
luggage compartment lamp connector terminal 
No.1.

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector G-14, junction block 
connector C-210, and repair if necessary.

• Check the power supply line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the wiring harness.

Step 9. Retest the system.

Check that the luggage compartment lamp 
illuminates and extinguishes 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 luggage compartment lamp.

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

AC310222

Connector: G-12

AI

G-12

Harness side

AC310623

Connector: C-210 <LHD>

AS

Harness side

Junction block (Front view)

AC310618

Connector: C-210 <RHD>

AQ

Harness side

Junction block (Front view)

AC310222

AC310222

Connector: G-14

AK

2

1

4

3

13

8

11

10

5

7

12

6

14

9

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-432

Inspection Procedure P-4: The luggage compartment lamp does not illuminate normally. <Vehicles 
without keyless entry system>

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

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

POSSIBLE CAUSES

• Malfunction of the luggage compartment lamp 

bulbs

• Damaged harness wires and connectors

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?

Luggage Room Lamp Circuit

ETACS-ECU

LUGGAGE COMPARTMENT 
LAMP

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

J/B SIDE

Item No.

Item name

Normal 
condition

Item 32

DR DOOR SW

ON

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-433

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 rear 
personal 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

OK: Normal conditions displayed for all the 
items.

Q: Is the check result normal?

Normal conditions are displayed for all the items. : 

Go to Step 3.

Normal condition is not displayed for item No.03 : 

Refer to inspection procedure Q-11 "The 
key reminder switch signal is not received 

P.54C-493

."

Normal condition is not displayed for item No.05, 
07, 41or 42 : 

Refer to inspection procedure Q-14 

"All the door switch signals are not received 

P.54C-505

."

Normal condition is not displayed for item No.21 
and 32 : 

Refer to inspection procedure Q-15 "The 

driver's door lock actuator switch signal is 
not received <LH drive vehicles>

P.54C-514

 

or <RH drive vehicles>

P.54C-518

."

Step 3. Pulse check

Check the input signals below, which is related to the 
luggage compartment lamp.

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

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Refer to inspection procedure Q-22 "The 
interior lamp "all on" or "all off" switch signal 
is not sent to the ETACS-ECU 

P.54C-553

."

Step 4. Connector check: G-12 luggage 
compartment lamp connector

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the defective connector.

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

System switch

Check condition

Interior lamp ON switch

When turned from OFF 
to ON

Interior lamp OFF switch When turned from ON to 

OFF

AC310222

Connector: G-12

AI

G-12

Harness side