Mitsubishi Montero Sport (2004+). Manual - part 544

DOME LIGHT

TSB Revision

CHASSIS ELECTRICAL

54-163

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CIRCUIT OPERATION
The dome light and cargo space light dimming func-
tion and keyless entry system answerback function 
illuminate the dome light and cargo space light when 
the dome light and cargo space light switch is at 
"ROOM" control operation position.

.

TECHNICAL DESCRIPTION (COMMENT)
The dome light and cargo space light does not illumi-
nate at all, the dome light and cargo space light bulb 
may be burned out, or the power supply circuit or the 
ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• Malfunction of the dome light 

• Malfunction of the cargo space light 

• Damaged harness wires or connectors

AC003443

AE

CONNECTORS: D-14, D-27

D-14 (B)

D-27 (B)

JUNCTION BLOCK (REAR)

AC004041AC

CONNECTORS: E-16, E-20, E-21

E-16

E-21 (GR)

E-20 (GR)

DOME LIGHT

TSB Revision

CHASSIS ELECTRICAL

54-164

.

DIAGNOSIS

Required Special Tool:

• MB991223: Test Harness Set

STEP 1. Check the trouble symptom.
Q: Do the dome light and cargo space light illuminate when 

the dome light and cargo space light switch is set to 
"ON" position?
YES : Go to Step 2.
NO :  Go to Step 4.

STEP 2. Check dome light connector E-20 <vehicles with 
sunroof> or E-21 <vehicles without sunroof>, cargo space 
light connector E-16 and ETACS-ECU connector D-27 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.

Q: Are dome light connector E-20 <vehicles with sunroof> 

or E-21 <vehicles without sunroof>, cargo space light 
connector E-16 and ETACS-ECU connector D-27 in good 
condition?
YES : Go to Step 3.
NO :  Repair or replace them. Refer to GROUP 00E, 

Harness Connector Inspection 

P.00E-2

. The dome 

light should illuminate.

1
2

1

2

AC201833

AC201834

42

43

50

51

45

46

53

54

52

44

48

5655

47

49

41

AD

JUNCTION BLOCK SIDE (REAR)

CONNECTOR: D-27

COMPONENT SIDE

D-27(B)

DOME LIGHT

TSB Revision

CHASSIS ELECTRICAL

54-165

STEP 3. Check the harness wires between dome light 
connector E-20 (terminal No.2) <vehicles with sunroof> or 
E-21 terminal No.2) <vehicles without sunroof>, cargo 
space light connector E-16 (terminal No.2) and 
ETACS-ECU connector D-27 (terminal No.44).

1
2

1

2

AC201833

AC201835

42

43

50

51

45

46

53

54

52

44

48

56 55

47

49

41

1
8

3

4

5

7 6

10

15

16

14

12

13

11

9

2

AB

CONNECTORS: D-14 , D-27

D-14 (B)

D-27 (B)

D-14  COMPONENT SIDE

D-27  COMPONENT SIDE

DOME LIGHT

TSB Revision

CHASSIS ELECTRICAL

54-166

NOTE: After checking junction block connector D-07 and D-14, 
check the wires. If junction block connector D-07 and D-14 are 
damaged, repair or replace them. Refer to GROUP 00E, Har-
ness Connector Inspection 

P.00E-2

.

Q: Are the harness wires between dome light connector 

E-20 (terminal No.2) <vehicles with sunroof> or E-21 
(terminal No.2) <vehicles without sunroof>, cargo space 
light connector E-16 (terminal No.2) and ETACS-ECU 
connector D-27 (terminal No.44) in good condition?
YES : Replace the ETACS-ECU. The dome light and cargo 

space light should illuminate.

NO :  Repair them. The dome light and cargo space light 

should illuminate.

STEP 4. Check the dome light bulb or cargo space light 
bulb.
Q: Is the dome light bulb or cargo space light bulb in good 

condition?
YES : Go to Step 5.
NO :  Replace it. The dome light and cargo space light 

should illuminate.

AC201836

2

1

CONNECTOR: D-07

AB

JUNCTION BLOCK
 (FRONT)

COMPONENT SIDE

1

2

D-07