Mitsubishi Galant 9G. Manual — part 86
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-340
.
TECHNICAL DESCRIPTION (COMMENT)
If one of the headlights does not illuminate, a head-
light bulb may be defective.
.
TROUBLESHOOTING HINTS
• The headlight bulb may be defective
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
.
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Check the headlight operation.
Q: Which of the headlights does not illuminate?
LH (low and high beam) : Go to Step 2.
RH (low and high beam) : Go to Step 5.
LH (only low-beam) : Go to Step 8.
RH (only low-beam) : Go to Step 11.
LH (only high beam) : Go to Step 14.
RH (only high beam) : Go to Step 17.
Low beam only (both RH and LH) : Refer to Inspection
Procedure H-2 "The headlights (low-beam) do not
illuminate normally
High beam only (both RH and LH) : Refer to Inspection
Procedure H-3 "The headlights (high-beam) do not
illuminate normally
High beam indicator light : Refer to Inspection Procedure
H-8 "The high-beam indicator light does not illuminate
STEP 2. Check headlight (LH) connector A-19 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is headlight (LH) connector A-19 in good condition?
YES : Go to Step 3.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Check that the headlights illuminate
normally.
STEP 3. Check headlight (LH) bulb.
(1) Remove the headlight (LH) bulb.
(2) Verify that the headlight (LH) bulb is not damaged or burned
out.
Q: Is headlight (LH) bulb normal?
YES : Go to Step 4.
NO : Replace the headlight (LH) bulb. Verify that the
headlights illuminate normally.
AC400526
AJ
CONNECTOR: A-19
A-19 (GR)
HARNESS SIDE
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-341
STEP 4. Check the wiring harness between headlight (LH)
connector A-19 (terminal 2) and ground.
Q: Is the wiring harness between headlight (LH) connector
A-19 (terminal 2) 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 headlights illuminate normally.
STEP 5. Check headlight (RH) connector A-33 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is headlight (RH) connector A-33 in good condition?
YES : Go to Step 6.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Check that the headlights illuminate
normally.
STEP 6. Check the headlight (RH) bulb.
(1) Remove the headlight (RH) bulb.
(2) Verify that the headlight (RH) bulb is not damaged or
burned out.
Q: Is headlight (RH) bulb normal?
YES : Go to Step 7.
NO : Replace the headlight (RH) bulb. Verify that the
headlights illuminate normally.
STEP 7. Check the wiring harness between headlight (RH)
connector A-33 (terminal 2) and ground.
Q: Is the wiring harness between headlight (RH) connector
A-33 (terminal 2) 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 headlights illuminate normally.
AC400526
AJ
CONNECTOR: A-19
A-19 (GR)
HARNESS SIDE
AC305206AM
CONNECTOR: A-33
A-33(GR)
HARNESS SIDE
AC305206AM
CONNECTOR: A-33
A-33(GR)
HARNESS SIDE
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-342
STEP 8. Check headlight (LH) connector A-19 and
front-ECU connector A-11X for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are headlight (LH) connector A-19 and front-ECU
connector A-11X in good condition?
YES : Go to Step 9.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Check that the headlights illuminate
normally.
STEP 9. Check headlight (LH) bulb.
(1) Remove the headlight (LH) bulb.
(2) Verify that the headlight (LH) bulb is not damaged or burned
out.
Q: Is headlight (LH) bulb normal?
YES : Go to Step 10.
NO : Replace the headlight (LH) bulb. Verify that the
headlights illuminate normally.
AC305977AH
CONNECTOR: A-11X
RELAY BOX SIDE
AC400526
AJ
CONNECTOR: A-19
A-19 (GR)
HARNESS SIDE
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-343
STEP 10. Check the wiring harness between headlight (LH)
connector A-19 (terminal 1) and front-ECU connector
A-11X (terminal 6).
Q: Is the wiring harness between headlight (LH) connector
A-19 (terminal 1) 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 headlights illuminate normally.
STEP 11. Check headlight (RH) connector A-33 and
front-ECU connector A-11X for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are headlight (RH) connector A-33 and front-ECU
connector A-11X in good condition?
YES : Go to Step 12.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Check that the headlights illuminate
normally.
AC305977AH
CONNECTOR: A-11X
RELAY BOX SIDE
AC400526
AJ
CONNECTOR: A-19
A-19 (GR)
HARNESS SIDE
AC305977AH
CONNECTOR: A-11X
RELAY BOX SIDE
AC305206AM
CONNECTOR: A-33
A-33(GR)
HARNESS SIDE
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