Mitsubishi Galant (2004+). Manual — part 306
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-415
STEP 5. Check the battery power supply circuit to the fog
light relay. Measure the voltage at fog light relay connector
A-05X.
CAUTION
The top and bottom of the fog light relay are difficult to
identify. Prior to inspection, confirm the triangle mark on
the relay box.
(1) Disconnect fog light relay connector A-05X and measure
the voltage available at the relay box side of the connector.
(2) Measure the voltage between terminal 1 and ground, and
also between terminal 2 and ground.
• The voltage should measure approximately 12 volts
(battery positive voltage).
Q: Is the measured voltage approximately 12 volts (battery
positive voltage)?
YES : Go to Step 7.
NO : Go to Step 6.
STEP 6. Check the wiring harness between fog light relay
connector A-05X (terminals 1 and 2) and the battery.
Q: Is the wiring harness between fog light relay connector
A-05X (terminals 1 and 2) and the battery 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 fog lights illuminate normally.
AC305979 AB
CONNECTOR: A-05X
RELAY BOX SIDE
FRONT OF VEHICLE
AC209365
CONNECTOR A-05X
(RELAY BOX SIDE)
EK
AC305979 AB
CONNECTOR: A-05X
RELAY BOX SIDE
FRONT OF VEHICLE
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-416
STEP 7. Check front-ECU connector A-11X for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is front-ECU connector A-11X in good condition?
YES : Go to Step 8.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Verify that the fog lights illuminate normally.
STEP 8. Check the wiring harness between fog light relay
connector A-05X (terminal 3) and front-ECU connector
A-11X (terminal 11).
Q: Is the wiring harness between fog light relay connector
A-05X (terminal 3) and front-ECU connector A-11X
(terminal 11) in good condition?
YES : Go to Step 9.
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 fog lights illuminate normally.
STEP 9. Replace the ECU.
(1) Replace the front-ECU.
(2) The fog lights should illuminate normally.
Q: Do the fog lights illuminate normally?
YES : No action is necessary and testing is complete.
NO : Replace the ETACS-ECU. Verify that the fog lights
illuminate normally.
AC305979 AB
CONNECTOR: A-05X
RELAY BOX SIDE
FRONT OF VEHICLE
AC305987AB
CONNECTORS: A-05X, A-11X
RELAY BOX SIDE
A-11X
A-05X
A-05X
A-11X
FRONT OF VEHICLE
RELAY BOX SIDE
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-417
INSPECTION PROCEDURE J-2: Fog Light: Fog lights do not go out when the headlights (low-beam)
are turned off while the fog lights are on.
.
TECHNICAL DESCRIPTION (COMMENT)
If the trouble above occurs, the front-ECU may be
defective.
.
TROUBLESHOOTING HINT
The front-ECU may be defective
DIAGNOSIS
Replace the front-ECU.
The fog lights should go out when the headlights (low-beam)
are turned off while the fog lights are on.
INSPECTION PROCEDURE J-3: Fog Light: One of the fog lights does not illuminate.
BATTERY
FOG
LIGHT
(RH)
FOG
LIGHT
(LH)
FRONT-ECU
RELAY
BOX
FOG LIGHT
RELAY
Fog Light Circuit
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-418
.
TECHNICAL DESCRIPTION (COMMENT)
If one of the fog lights does not illuminate, the fog
light relay or the fog light bulb may be defective. If
the fog light indicator light does not illuminate, the
combination meter may be defective.
.
TROUBLESHOOTING HINTS
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
• The fog light bulb may be defective
.
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Verify that the fog lights and the fog light indicator
light illuminate.
Q: Do the fog lights and the fog light indicator light
illuminate normally?
Only the fog light (LH) does not illuminate : Go to Step 2.
Only the fog light (RH) does not illuminate : Go to Step
Only the fog light indicator does not illuminate : Refer to
Inspection Procedure J-4 "The fog light indicator does
not illuminate normally
Both of the fog lights do not illuminate : Refer to
Inspection Procedure J-1 "Fog lights do not illuminate
when the fog light switch is turned on
."
AC305979
CONNECTOR: A-05X
AC
AC305210AB
CONNECTOR: A-22
A-22 (B)
AC305206
CONNECTOTR: A-28
AB
A-28 (B)
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