Mitsubishi 380. Manual - part 92

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-365

NOTE: Also check junction block connector C-205 for loose, 
corroded, or damaged terminals, or terminals pushed back in 
the connector. If junction block connector C-205 is damaged, 
repair or replace the damaged component(s) as described in 
GROUP 00E, Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between map lamp assembly 

connector D-02 (terminal 1) <without sunroof> or 
overhead console assembly connector D-03 (terminal 1) 
<with sunroof> and ETACS-ECU connector C-219 
(terminal 6) in good condition?
YES : Replace the ETACS-ECU. Verify that the dome lamp 

illuminates normally.

NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. Verify that 
the dome lamp illuminates normally.

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-366

INSPECTION PROCEDURE K-2: Interior Light: The front dome lamp, rear dome lamp or trunk lamp do 
not illuminate or go out normally.

.

CIRCUIT OPERATION

The ETACS-ECU operates the dome lamp according 
to the following signals:

• Ignition switch (IG1): ON or OFF

• Key reminder switch: ON or OFF

• Door switches: ON or OFF

• Trunk lid latch assembly: ON or OFF

• Driver’s door lock actuator switch: LOCK or 

UNLOCK

.

16DB350A

CONNECTOR:C-28

16DB324A

CONNECTOR: C-204

HARNESS SIDE

54DB045A

CONNECTORS: C-218, C-219

JUNCTION BLOCK
(REAR VIEW)

C-219

C-218 (GR)

HARNESS SIDE

C-218

C-219

JUNCTION BLOCK SIDE

45

46

48 47

49

50
59

51
60

52

53
62

65

61

54
63

56

68

64

67 66

57

58

55

16DB454A

CONNECTORS: D-02, D-03

D-02

D-03

D-02

D-03

16DB455A

CONNECTORS: D-07, D-10

D-07

D-10

D-10

D-07

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-367

TECHNICAL DESCRIPTION (COMMENT)

Is the dome lamp does not flash normally, a 
burned-out dome lamp bulb, the input circuits from 
the switches described in "CIRCUIT OPERATION", 
the power supply line to the switches or the 
ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• The front dome lamp bulb may be defective

• The rear dome lamp bulb may be defective

• The trunk lamp bulb may be defective

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

• The ETACS-ECU may be defective

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-368

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A

STEP 1. Check which of the front dome lamp, rear dome 
lamp or trunk lamp do not illuminate normally.

Q: Which of the front dome lamp, rear dome lamp or trunk 

lamp fail to illuminate normally?
Front dome lamp and rear dome lamp : Go to Step 2.
Front dome lamp : Go to Step 4.
Rear dome lamp : Go to Step 9.
Trunk lamp : Go to Step 14.

STEP 2. Check map lamp assembly connector D-02 
<without sunroof>, overhead console assembly connector 
D-03 <with sunroof> and ETACS-ECU connector C-219 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is map lamp assembly connector D-02 <without 

sunroof>, overhead console assembly connector D-03 
<with sunroof> and ETACS-ECU connector C-219 in 
good condition?
YES : Go to Step 3.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Check that the front dome lamp and rear 

dome lamp illuminates normally.

54DB014A

CONNECTOR: C-219

JUNCTION BLOCK SIDE

JUNCTION BLOCK

(REAR VIEW)

16DB454A

CONNECTORS: D-02, D-03

D-02

D-03

D-02

D-03