Mitsubishi Grandis. Manual - part 99

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-393

NOTE: 

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

• Check the earth wires for open circuit.

Q: Is the check result normal?

YES : 

Replace the rear personal lamp.

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

AF

Connectors: E-04, E-06, E-08, E-09, E-11            

Harness side

E-04

E-04, E-06, E-08, E-09

E-09

<LHD>

E-11

E-06

E-08

E-11

AC310656

AE

Connectors: E-04, E-06, E-08, E-09, E-11           

Harness side

E-04

E-04, E-06, E-08, E-09

E-09

<RHD>

E-11

E-05

E-08

E-11

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) NOT USING SWS MONITOR

54B-394

Inspection Procedure P-4: The luggage compartment lamp does not illuminate normally.

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

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

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-395

DIAGNOSTIC PROCEDURE

Step 1. Pulse check
Check the input signals below, which are related to 
the room lamp.

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

Q: Is the check result normal?

All the signals are received normally. : 

Go to Step 

2.

All the door switch signals are not received. : 

Refer to inspection procedure Q-14 "All the 
door switch signals are not received 

P.54B-469

."

The driver's door lock actuator switch signal is not 
received. : 

Refer to inspection procedure Q-15 

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

P.54B-478

 or <RH drive 

vehicles>

P.54B-481

."

The interior lamp switch signal is not received. : 

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

P.54B-514

."

Step 2. Connector check: G-12 luggage 
compartment lamp connector

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the defective connector.

Step 3. Check the bulbs of the luggage 
compartment lamp.
Check that the luggage compartment lamp bulbs are 
not burned out.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Replace the luggage compartment lamp 
bulb.

Step 4. Connector check: C-221 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the defective connector.

System switch

Check condition

Driver's door switch

Driver's door is opened 
while all the other doors 
are closed.

Passenger’s door switch Passenger's door is 

opened while all the 
other doors are closed.

Rear door (RH) switch

Rear door (RH) is 
opened while all the 
other doors are closed

Rear door (LH) switch

Rear door (LH) door is 
opened while all the 
other doors are closed

Tailgate switch

TAilgate is opened while 
all the other doors are 
closed

Driver's door lock 
actuator switch

When the driver's door is 
unlocked or locked

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

AC310626

Connector: C-221

Junction block (Rear view)

<LHD>

AC

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

Harness side

C-221(GR)

AC310620

Connector: C-221

Junction block 
(Rear view)

<RHD>

AC

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

Harness side

C-221(GR)

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-396

Step 5. Check the wiring harness from C-221 
ETACS-ECU connector terminal No.52 to G-12 
luggage compartment lamp connector terminal 
No.2.

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector C-16, G-14, and repair if 
necessary.

• Check the earth wires for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the wiring harness.

AC310626

Connector: C-221

Junction block (Rear view)

<LHD>

AC

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

Harness side

C-221(GR)

AC310620

Connector: C-221

Junction block 
(Rear view)

<RHD>

AC

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

Harness side

C-221(GR)

AC310222

Connector: G-12

AI

G-12

Harness side

AC310615

AE

Connector: C-16 <LHD>

AC310631 AD

Connector: C-16 <RHD>

AC310222

AC310222

Connector: G-14

AK

2

1

4

3

13

8

11

10

5

7

12

6

14

9