Mitsubishi Galant (2004+). Manual - part 313

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-443

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: Scan 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 light, rear dome 
light or trunk light do not illuminate normally.
Q: Which of the front dome light, rear dome light or trunk 

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

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-444

STEP 2. Check map light 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 light 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 light and rear 

dome light illuminates normally.

AC305413 AG

CONNECTOR: C-219

JUNCTION BLOCK SIDE

JUNCTION BLOCK

(REAR VIEW)

AC305265

AB

CONNECTORS: D-02, D-03

D-02
D-03

D-02

D-03

HARNESS SIDE

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-445

STEP 3. Check the wiring harness between map light 
assembly connector D-02 (terminals 1 and 2) <without 
sunroof> or overhead console assembly connector D-03 
(terminals 1 and 2) <with sunroof> and ETACS-ECU 
connector C-219 (terminals 6 and 5).

Q: Is the wiring harness between map light assembly 

connector D-02 (terminals 1 and 2) <without sunroof> or 
overhead console assembly connector D-03 (terminals 
1 and 2) <with sunroof> and ETACS-ECU connector 
C-219 (terminals 6 and 5) in good condition?
YES : No action is necessary and testing is complete.
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. Check that 
the front dome light and rear dome light illuminates 
normally.

AC305413 AG

CONNECTOR: C-219

JUNCTION BLOCK SIDE

JUNCTION BLOCK

(REAR VIEW)

AC305265

AB

CONNECTORS: D-02, D-03

D-02
D-03

D-02

D-03

HARNESS SIDE

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-446

STEP 4. Check map light assembly connector D-02 
<without sunroof> or overhead console assembly 
connector D-03 <with sunroof> for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.

Q: Is map light assembly connector D-02 <without 

sunroof> or overhead console assembly connector 
D-03 <with sunroof> in good condition?
YES : Go to Step 5.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Check that the front dome light illuminates 

normally.

STEP 5. Check the front dome light bulb.
Q: Is the front dome light bulb in good condition?

YES : Go to Step 6.
NO :  Replace the front dome light bulb. Check that the front 

dome light illuminates normally.

AC305265

AB

CONNECTORS: D-02, D-03

D-02
D-03

D-02

D-03

HARNESS SIDE