Headlight & Front Side-Marker Light - Evolution Mitsubishi Lancer Evolution VIII

INTRODUCTION

The headlights are controlled by the Simplified Wiring System (SWS). For troubleshooting, refer to SWS DIAGNOSIS .

TROUBLESHOOTING STRATEGY

VISUAL CHECK OF THE CONTROLLER (CASE)

If any of the defects below are found, replace the controller.

Scheme 75

CHECK THE WIRING HARNESS BETWEEN THE CONTROLLER AND THE BULB

If any of the defects below are found, replace the wiring harness between the controller and the bulb.

Scheme 76

CHECKING WHILE THE HEADLIGHTS ARE ON

If any of the defects below are found, replace the controller.

Note. Ensure that the headlight control system and its circuit (power supply control at engine start and during steady illumination, high-voltage generating circuit, etc.) are working normally. Then check whether internal breakage has occurred in the controller. However, some internal breakage may not be able to be found.

Scheme 77

HOW TO DIAGNOSE THE DISCHARGE HEADLIGHTS

1. Check that the connectors are connected securely and the fuse has not been blown.
2. Before starting the diagnosis, read through the " «SYMPTOM CHART»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/exterior-lights/#headlight-front-side-marker-light-evolution) " to understand what and how you should do. Follow all the procedures carefully.
3. The components should be checked with their connectors disconnected.

Scheme 78

Note. The numbers indicate the sequence in which the component is checked. Refer to SYMPTOM CHART for the troubleshooting other than above. If the ETACS-ECU failed, only the low-beam headlights will illuminate as a fail-safe measure.

Scheme 79

1. Inspect for badly rusted or faulty headlight 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 luggage room of 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 headlight lenses.
7. Set the headlight leveling switch to zero position.
8. Place the vehicle on a level floor, perpendicular to a flat screen 7.62m (25.0 feet) away from the bulb center-marks on the headlight lens.
9. Rock vehicle sideways to allow vehicle to assume its normal position.
10. Bounce the front suspension through three (3) oscillations by applying the body weight to hood or bumper.
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-marks on the headlight 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 headlight. Transfer the measurement to the screen. Vertical tape or mark on the screen with reference to the center line of each headlight bulb.

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1. The low beam headlight should project on the screen upper edge of the beam (cut-off).
2. If not the case, turn the adjusting screws to achieve the specified low-beam cut-off location on the aiming screen. Standard value: (Vertical direction) Range of headlight center line 53 +/- 50 mm (+/- 2.1 inches) NOTE: There is no horizontal aim adjustment. Horizontal aim is preset and does not require adjustment.
3. When adjusting one headlight, disconnect the other headlight harness. CAUTION: Do not cover a headlight for more than three minutes, or the plastic headlight lens will become deformed.
4. High-beam pattern should be correct when the low-beams are adjusted properly.

Scheme 82

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 fuel tank is not full, place a weight in the trunk of the vehicle to simulate weight of a full tank [3 kilograms (6.5 pounds) per gallon.]
5. There should be no other load in the vehicle other than driver or substituted weight or approximately 70 kilograms (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 headlight 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.

Scheme 83

Scheme 84

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°) 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°) 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.

INTENSITY MEASUREMENT

1. Set the headlights to high-beam
2. Using a photometer, and following its manufacturer's instruction manual, measure the headlight center intensity and check to be sure that the limit value is satisfied. Limit: 40,000 cd or more (When a screen is set 18.3m (60.0 feet) ahead of the vehicle)

Note. When measuring the intensity, maintain an engine speed of 2,000 r/min, with the battery fully charged. There may be special local regulations pertaining to headlight intensity. Be sure to make any adjustments necessary to satisfy such regulations. If an illuminometer is used to make the measurements, convert its values to photometer values by using the following formula.

I = Er2 Where

1. I = Intensity (cd)
2. E = Illumination (lux)
3. r = distance (m) from headlights to illuminometer

Scheme 85

1. Disconnect the battery.
2. Disconnect the connector. CAUTION: Do not touch the surface of the bulb with hands or dirty gloves, as the bulb may pop after a short time. If the surface does become dirty, clean it with alcohol or thinner, and let it dry thoroughly before installing.
3. Screw out the head light bulb.
4. Replace the value, and connect securely the connector.

Scheme 86

1. Disconnect the battery.
2. Disconnect the connector. CAUTION: Do not touch the surface of the bulb with hands or dirty gloves, as the bulb may pop after a short time. If the surface does become dirty, clean it with alcohol or thinner, and let it dry thoroughly before installing.
3. Screw out the head light bulb.
4. Replace the valve, and connect securely the connector.

Scheme 87

1. Disconnect the battery.
2. Disconnect the connector. CAUTION: Do not touch the surface of the bulb with hands or dirty gloves as the bulb may pop after a short time. If the surface does become dirty, clean it with alcohol or thinner, and let it dry thoroughly before installing.
3. Screw out the fog light bulb.
4. Replace the value, and securely connect the connector.

Scheme 88

1. Remove the splash shield.
2. Screw out the position light socket.

Scheme 89

1. Remove the splash shield.
2. Screw out the front turn signal socket.

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See also:
• SWS DIAGNOSIS
• HOW TO CHECK DISCHARGE HEADLIGHT COMPONENTS