2005 MITSUBISHI 380 bulb

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-291
DIAGNOSIS
Required Special Tool:
MB991223: Harness Set
STEP 1. Check the headlamp operation.
Q: Which of the headlamps does not illuminate?
LH (low beam) : Go to Step 2.
RH (low beam) : Go to Step 6.
LH (only low-beam) : Go to Step 10.
RH (only low-beam) : Go to Step 13.
LH (only high beam) : Go to Step 16.
RH (only high beam) : Go to Step 21.
Low beam only (both RH and LH) : Refer to Inspection
Procedure H-2 "The headlamps (low-beam) do not
illuminate normally P.54B-264."
High beam only (both RH and LH) : Refer to Inspection
Procedure H-3 "The headlamps (high-beam) do not
illuminate normally P.54B-268."
High beam indicator lamp : Refer to Inspection Procedure
H-8 "The high-beam indicator lamp does not
illuminate P.54B-301."
STEP 2. Check headlamp (LH) connector A-20 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is headlamp (LH) connector A-20 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 headlamps illuminate
normally.
STEP 3. 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 4.
NO : Replace the headlamp (LH) bulb. Verify that the
headlamps illuminate normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-293
STEP 7. 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 8.
NO : Replace the headlamp (RH) bulb. Verify that the
headlamps illuminate normally.
STEP 8. 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 terminal (5) and
ground.
The resistance should be 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to step 13.
NO : Go to Step 9.
STEP 9. Check the wiring harness between headlamp (RH)
connector A-32 (terminal 5) and ground.
Q: Is the wiring harness between headlamp (RH) connector
A-32 (terminal 5) 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.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-294
STEP 10. 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 11.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Check that the headlamps illuminate
normally.
STEP 11. 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 12.
NO : Replace the headlamp (LH) bulb. Verify that the
headlamps illuminate normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-296
STEP 14. 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 15.
NO : Replace the headlamp (RH) bulb. Verify that the
headlamps illuminate normally.
STEP 15. Check the wiring harness between headlamp
(RH) connector A-32 (terminal 6) and front-ECU connector
A-11X (terminal 6).
Q: Is the wiring harness between headlamp (RH) connector
A-32 (terminal 6) and front-ECU connector A-11X
(terminal 6) 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.

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.

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.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-309
FLASHER TIMER
GENERAL DESCRIPTION CONCERNING THE FLASHER TIMERM1549023600238
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80The following ECUs affect the functions and control
of the flasher timer.
FLASHER TIMER FUNCTION
.
TURN-SIGNAL LAMP
The turn-signal lamp output (flashing signal) is turned ON when
the ignition switch is ON and the turn-signal lamp switch is ON
(LH or RH). If the front turn-signal lamp or rear turn-signal lamp
bulb has burned out, the flashing speed increases to indicate
that the bulb has burned out.
NOTE: If LH or RH side turn signal lamp bulbs have burned
out, the flashing speed will remain the same.
.
TURN-SIGNAL INDICATORS
At the same time that the turn-signal lamps are illuminated, the
ETACS-ECU sends a signal to illuminate the turn-signal lamp
indicator via the CAN bus line. The combination meter receives
the transmitted signal and turns the turn-signal lamp indicator
on and off.
.
HAZARD WARNING LAMP
Detects the signal where the hazard warning lamp switch input
changes from OFF to ON, and reverse the flashing state
according to this signal. The hazard warning lamps toggle on
and off whenever the hazard warning lamp switch is operated.
NOTE: The hazard warning lamp switch is a push-return type
toggle switch. FUNCTION CONTROL ECU
Turn-signal lamp ETACS-ECU, column switch
Turn-signal indicators ETACS-ECU, column switch
Hazard warning lamp ETACS-ECU

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-316
INSPECTION PROCEDURE I-3: Flasher Timer: One of the turn-signal lamps does not illuminate.
.
TECHNICAL DESCRIPTION (COMMENT)
If the right or left turn-signal lamp does not illuminate,
their bulb may be defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The turn-signal 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
.