Mitsubishi 380. Manual - part 75

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-297

STEP 16. Check headlamp (LH) connector A-20 and 
front-ECU connector A-11X for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are headlamp (LH) connector A-20 and front-ECU 

connector A-11X in good condition?
YES : Go to Step 17.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the headlamps illuminate 

normally.

STEP 17. Check headlamp (LH) bulb.
(1) Remove the headlamp (LH) bulb.
(2) Verify that the headlamp (LH) bulb is not damaged or 

burned out.

Q: Is headlamp (LH) bulb normal?

YES : Go to Step 18.
NO :  Replace the headlamp (LH) bulb. Verify that the 

headlamps illuminate normally.

AC305977AH

CONNECTOR: A-11X

RELAY BOX SIDE 

16DB434A

A-20

CONNECTOR: A-20

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-298

STEP 18. Check the wiring harness between headlamp 
(LH) connector A-20 (terminals 3 and 4) and front-ECU 
connector A-11X (terminal 10).
Q: Is the wiring harness between headlamp (LH) connector 

A-20 (terminals 3 and 4) and front-ECU connector A-11X 
(terminal 10) in good condition?
YES : Go to step 19.
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 headlamps illuminate normally.

STEP 19. Check the ground circuit to the front Headlamp 
(LH). Measure the resistance at front combination lamp 
(LH) connector A-20.
(1) Disconnect front combination lamp (LH) connector A-20 

and measure the resistance available at the wiring harness 
side of the connector.

(2) Measure the resistance value between terminals (5 and 1) 

and ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : .No action is necessary and testing is complete.
NO :  Go to Step 20.

AC305977AH

CONNECTOR: A-11X

RELAY BOX SIDE 

16DB434A

A-20

CONNECTOR: A-20

16DB434A

A-20

CONNECTOR: A-20

16DB440A

CONNECTOR A-20

(HARNESS SIDE)

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-299

STEP 20. Check the wiring harness between headlamp 
(LH) connector A-20 (terminals 5 and 1) and ground.
Q: Is the wiring harness between headlamp (LH) connector 

A-20 (terminals 5 and 1) and ground 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. Verify that 
the headlamps illuminate normally.

STEP 21. Check headlamp (RH) connector A-32 and 
front-ECU connector A-11X for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are headlamp (RH) connector A-32 and front-ECU 

connector A-11X in good condition?
YES : Go to Step 22.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the headlamps illuminate 

normally.

STEP 22. Check the headlamp (RH) bulb.
(1) Remove the headlamp (RH) bulb.
(2) Verify that the headlamp (RH) bulb is not damaged or 

burned out.

Q: Is headlamp (RH) bulb normal?

YES : Go to Step 23.
NO :  Replace the headlamp (RH) bulb. Verify that the 

headlamps illuminate normally.

16DB434A

A-20

CONNECTOR: A-20

AC305977AH

CONNECTOR: A-11X

RELAY BOX SIDE 

16DB433A

A-32

CONNECTORS:   A-32

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-300

STEP 23 . Check the wiring harness between headlamp 
(RH) connector A-32 (terminals 3 and 4) and front-ECU 
connector A-11X (terminal 10).
Q: Is the wiring harness between headlamp (RH) connector 

A-32 (terminals 3 and 4) and front-ECU connector A-11X 
(terminal 10) in good condition?
YES : Go to step 24.
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 headlamps illuminate normally.

STEP 24. Check the ground circuit to the front Headlamp 
(RH). Measure the resistance at front combination lamp 
(RH) connector A-32.
(1) Disconnect front combination lamp (RH) connector A-32 

and measure the resistance available at the wiring harness 
side of the connector.

(2) Measure the resistance value between terminals (5 and 1) 

and ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : .No action is necessary and testing is complete.
NO :  Go to Step 25.

AC305977AH

CONNECTOR: A-11X

RELAY BOX SIDE 

16DB433A

A-32

CONNECTORS:   A-32

16DB433A

A-32

CONNECTORS:   A-32

16DB441A

CONNECTOR A-32

(HARNESS SIDE)