Fog Light - Except Evolution & Sportback Mitsubishi Lancer Evolution VIII

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LIGHTING SYSTEM DIAGNOSIS

When the front fog light switch is turned to ON with the tail light or the headlight on (the tail light switch or the headlight switch is ON), the fog light relay turns on, and the fog lights will illuminate.

If the tail lights or the headlights are turned off with the lighting switch OFF while the fog lights are on, the front fog lights turn off at the same time to prevent unattended operation.

If the tail lights are turned off by the headlight automatic shutdown function, the fog lights turn off at the same time. However, if the tail lights illuminate again, the fog lights do not.

The front fog lights are controlled by the Smart Wiring System (SWS). For troubleshooting, refer to SWS DIAGNOSIS .

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1. Inspect for badly rusted or faulty fog light assemblies.
2. These conditions must be corrected before a satisfactory adjustment can be made.
3. Inspect tire inflation, and adjust if necessary.
4. If the fuel tank is not full, place a weight in the trunk of the vehicle to simulate weight of a full tank [3 kg (6.5 pounds) per gallon].
5. There should be no other load in the vehicle other than driver or substituted weight of approximately 70 kg (150 pounds) placed in driver's position.
6. Thoroughly clean the fog light lenses.
7. Place the vehicle on a level floor, perpendicular to a flat screen 7.62 meters (25.0 feet) away from the bulb center-marks on the fog light lens.
8. Rock the vehicle sideways to allow the vehicle to assume its normal position.
9. Bounce the front suspension through three (3) oscillations by applying the body weight to the hood or bumper.
10. Measure the center of the fog lights as shown in the illustration.
11. Four lines of adhesive tape (or equivalent markings) are required on screen or wall: Position a vertical tape or mark so that it is aligned with the vehicle center line. Measure the distance from the center of the fog light lens to the floor. Transfer the measurement to the screen. Horizontal tape or mark on the screen is for reference of vertical adjustment. Measure the distance from the center line of the vehicle to the center of each fog light. Transfer the measurement to the screen. Vertical tape or mark on the screen is for reference to the center line of each fog light.

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1. Check if the beam shining onto the screen is at the standard value.
2. If it is not within the standard value range, adjust by turning the adjusting screw.

Standard value

(Vertical direction): Top of the hot zone should be 101 mm (4.0 inches) (0.76 degrees angle) downward from the height of the fog light center.

Limit

(Vertical direction): Top of the hot zone should be 152mm (6.0 inches) (1.14 degrees angle) in maximum downward from the height of the fog light center.

Note. The horizontal direction is non-adjustable. If deviation of the light beam axis exceeds the standard value, check that the mounting location or some other points are not faulty.

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<< A >> FRONT FOG LIGHT BULB REMOVAL

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1. Remove the bulb cover.
2. Remove the bulb installation spring and extract the bulb.

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Required Special Tool

MB990784: Ornament remover

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See also:
• SWS DIAGNOSIS