Mitsubishi Evolution X. Manual — part 967
FOG LIGHT
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CHASSIS ELECTRICAL
54A-229
.
TECHNICAL DESCRIPTION (COMMENT)
If one of the fog lights does not Illuminate, the wiring harness
connector(s), the bulb may be defective.
.
TROUBLESHOOTING HINTS
• Burned-out fog light bulb
• Damaged harness wires and connectors
DIAGNOSIS
Required Special Tools:
• MB992006: Extra fine probe
• MB991223: Harness set
STEP 1. Check fog light (LH) connector A-43 or fog light
(RH) A-54 for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Is fog light (LH) connector A-43 or fog light (RH) A-54 in
good condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
STEP 2. Check the fog light bulb.
(1) Remove the fog light bulb.
(2) Verify that the fog light bulb is not damaged or burned out.
Q: Is the fog light bulb in good condition?
YES : Go to Step 3.
NO : Replace the fog light bulb.
AC709111
Connector: A-15X
AH
AC708949AN
Connectors: A-43, A-50
A-43 (B)
A-50 (B)
AC708948AL
Connector: A-54
A-54 (B)
FOG LIGHT
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CHASSIS ELECTRICAL
54A-230
Step 3. Check the ground circuit to the fog light (LH) or fog
light (RH). Measure the resistance at fog light (LH)
connector A-43 or fog light (RH) connector A-54.
(1) Disconnect the connector, and measure at the wiring
harness side.
(2) Check the resistance between the fog light connector and
ground.
•
Resistance between A-43 fog light (LH) connector termi-
nal No.1 and ground
•
Resistance between A-54 front fog light (RH) connector
terminal No.1 and ground
OK: The resistance should be 2 ohm or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 5.
NO : Go to Step 4.
Step 4. Check the wiring harness between fog light (LH)
connector A-43 (terminal 1) or fog light (RH) connector
A-54 (terminal 1) and ground.
NOTE: Also check intermediate connector A-50 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector A-50 is damaged, repair or
replace the connector as described in GROUP 00E, Harness
Connector Inspection
.
• Check the ground wires for open circuit.
Q: Is the wiring harness between fog light (LH) connector
A-43 (terminal 1) or fog light (RH) connector A-54
(terminal 1) and ground in good condition?
YES : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to use
Troubleshooting/inspection Service Points, How to
Cope with Intermittent Malfunction
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.
AC608255 AX
Harness side: A-34
AC608255 AY
Harness side: A-44
FOG LIGHT
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CHASSIS ELECTRICAL
54A-231
STEP 5. Check fog light relay connector A-15X for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is fog light relay connector A-15X in good condition?
YES : Go to Step 6.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
STEP 6. Check the wiring harness between fog light (LH)
connector A-43 (terminal 2) or fog light (RH) connector
A-54 (terminal 2) and fog light relay connector A-15X
(terminal 3).
NOTE: Also check intermediate connector A-50 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector A-50 is damaged, repair or
replace the connector as described in GROUP 00E, Harness
Connector Inspection
.
• Check the power supply line for open circuit.
Q: Is the wiring harness between fog light (LH) connector
A-43 (terminal 2) or fog light (RH) connector A-54
(terminal 2) and fog light relay connector A-15X
(terminal 3) in good condition?
YES : Go to Step 7.
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.
STEP 7. Retest the system.
Q: Does the right or left fog light does not illuminate in
good condition?
YES : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to use
Troubleshooting/inspection Service Points, How to
Cope with Intermittent Malfunction
NO : Replace the fog light(s).
FOG LIGHT
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CHASSIS ELECTRICAL
54A-232
Inspection Procedure 3: The front fog light indicator does not illuminate normally.
CAUTION
Whenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the com-
munication circuit are normal.
.
TECHNICAL DESCRIPTION (COMMENT)
If the fog light indicator does not illuminate normally,
connector(s), wiring harness in the CAN bus lines,
the ETACS-ECU or the combination meter may be
defective.
.
TROUBLESHOOTING HINTS
• The ETACS-ECU may be defective
• The combination meter may be defective
• Damaged harness wires and connectors
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A
STEP 1. Check the fog lights.
When the fog light switch is operated, check that the fog lights
illuminate and go off normally.
Q: Is the fog lights normal?
YES : Go to Step 2.
NO : First, repair the front fog lights. Refer to Inspection
Procedure 2 "The right or left fog light does not
illuminate
INPUT SIGNAL
ETACS-ECU
COMBINATION
METER
CAN COMMUNICATION LINE
(CAN_L LINE)
CAN COMMUNICATION LINE
(CAN_H LINE)
Front Fog Light Indicator Light Circuit
FRONT FOG LIGHT
SWITCH
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