Lighting: Adjustments Lexus LS IV

ADJUSTMENT

HINT

It is possible that a bulb is incorrectly installed, affecting headlight aim. Bulb installation should be considered prior to performing the adjustment procedure.

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1. CHECK HEADLIGHT Check that each measurement is within its respective reference value. Reference value REFERENCE VALUE A 1.3 +/-0.8 mm (0.051 +/-0.031 in.) B 1.6 +/-1.5 mm (0.063 +/-0.059 in.) C 1.3 +/-0.8 mm (0.051 +/-0.031 in.)
2. REMOVE ENGINE ROOM SIDE COVER LH
3. REMOVE ENGINE ROOM SIDE COVER
4. REMOVE AIR CLEANER INLET COVER SUB-ASSEMBLY
5. REMOVE COOL AIR INTAKE DUCT SEAL
6. ADJUST HEADLIGHT Adjust the headlight fitting. Using a screwdriver, adjust the headlight vertically as shown in the illustration. HINT: To adjust the headlight downward, turn the adjusting screw clockwise. To adjust the headlight upward, turn the adjusting screw counterclockwise.
7. INSTALL COOL AIR INTAKE DUCT SEAL
8. INSTALL AIR CLEANER INLET COVER SUB-ASSEMBLY
9. INSTALL ENGINE ROOM SIDE COVER
10. INSTALL ENGINE ROOM SIDE COVER LH
11. VEHICLE PREPARATION FOR HEADLIGHT AIMING ADJUSTMENT Prepare the vehicle: Ensure there is no damage or deformation to the body around the headlights. Fill the fuel tank. Make sure that the oil is filled to the specified level. Make sure that the coolant is filled to the specified level. Inflate the tires to the appropriate pressure. Unload the trunk and vehicle, ensuring that the spare tire, tools, and jack are also removed. Have a person of average weight (55 kg, 121 lb) sit in the driver's seat. Vehicles with an adjustable suspension should be set to the lowest vehicle height prior to adjusting the headlight aim. Vehicles with manually adjustable headlights should be adjusted to "0".
12. PREPARATION FOR HEADLIGHT AIMING (Using a screen) Prepare the vehicle: Place the vehicle in a location that is dark enough to clearly observe the cutoff line. The cutoff line is a distinct line, below which light from the headlights can be observed and above which it cannot. Place the vehicle at a 90° angle to the wall. Create a 10 m (32.8 ft.) distance between the vehicle (headlight bulb center) and the wall. Make sure that the vehicle is on a level surface. Bounce the vehicle up and down to settle the suspension. NOTE: A distance of 10 m (32.8 ft.) between the vehicle (headlight bulb center) and the wall is necessary for proper aim adjustment. If sufficient space is not available, secure a distance of exactly 3 m (9.84 ft.) to allow for checking and adjustment of headlight aim. (The size of the target zone will change with the distance, so follow the instructions in the illustration.) Prepare a piece of thick white paper (approximately 2 m (6.56 ft.) (height) x 4 m (13.1 ft.) (width)) to use as a screen. Draw a vertical line down the center of the screen (V line). Set the screen as shown in the illustration. HINT: Stand the screen perpendicular to the ground. Align the V line on the screen with the center of the vehicle. Draw base lines (H, V LH, and V RH lines) on the screen as shown in the illustration. HINT: The base lines differ for "low-beam inspection" and "high-beam inspection." Mark the headlight bulb center marks on the screen. If the center mark cannot be observed on the headlight, use the center of the headlight bulb or the manufacturer's name marked on the headlight as the center mark. H Line (Headlight height): Draw a horizontal line across the screen so that it passes through the center marks. The H line should be at the same height as the headlight bulb center marks of the low-beam headlights. V LH Line, V RH Line (Center mark position of left-hand (LH) and right-hand (RH) headlights): Draw two vertical lines so that they intersect the H line at each center mark (aligned with the center of the low-beam headlight bulbs).
13. HEADLIGHT AIMING INSPECTION Cover the headlight or disconnect the connector of the headlight on the opposite side to prevent light from the headlight that is not being inspected from affecting the headlight aiming inspection. NOTE: Do not keep the headlight covered for more than 3 minutes. The headlight lens is made of synthetic resin, which may melt or be damaged due to excessive heat. HINT: When checking the aim of the high-beam, cover the low-beam or disconnect the connector. Start the engine. Turn on the headlight and check if the cutoff line matches the preferred cutoff line in the following illustration. HINT: Since the low beam light and the high beam light on each side have separate reflectors, it is necessary to check and adjust the aim separately for both. If the alignment distance is 10 m (32.8 ft.): The cutoff line should be within 133 mm (5.24 in.) above or below the H line as well as 101.6 mm (3.99 in.) left or right of the V line with low-beam. If the alignment distance is 3 m (9.84 ft.): The low beam cutoff line should be within 40 mm (1.57 in.) above or below the H line as well as 40 mm (1.57 in.) left or right of the V line. If the alignment distance is 10 m (32.8 ft.): The high beam center of intensity should be within 133 mm (5.24 in.) above or below the H line as well as 101.6 mm (3.99 in.) left or right of the V line. If the alignment distance is 3 m (9.84 ft.): The high beam center of intensity should be within 40 mm (1.57 in.) above or below the H line as well as 40 mm (1.57 in.) left or right of the V line. If the alignment distance is 10 m (32.8 ft.): The low beam cutoff line should be 87 mm (3.43 in.) below the H line (preferred cutoff line target). If the alignment distance is 3 m (9.84 ft.): The low beam cutoff line should be 26 mm (1.02 in.) below the H line (preferred cutoff line target).
14. HEADLIGHT AIMING ADJUSTMENT Adjust the aim vertically: Adjust the aim of each headlight to the specified range by turning each aiming screw with a screwdriver. NOTE: The final turn of the aiming screw should be made in the clockwise direction. If the screw is tightened excessively, loosen it and then retighten it, so that the final turn of the screw is in the clockwise direction. HINT: The low-beam light and the high-beam light are a unit. Adjusting the aim on the low-beam to the correct position should also result in the high-beam adjustment being correct. If it is not possible to correctly adjust headlight aim, check bulb, headlight unit, and headlight unit reflector installation. The headlight aim moves up when turning the aiming screw clockwise, and moves down when turning the aiming screw counterclockwise.

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1. INSTALL FRONT BUMPER BAR REINFORCEMENT LH Install the front bumper bar reinforcement LH with the 2 screws.
2. INSTALL HEADLIGHT GASKET Install a new headlight gasket.
3. INSTALL HEADLIGHT CONTROL ECU LH Pass the headlight control ECU socket through the headlight assembly. NOTE: Be careful not to damage the reflector or headlight housing with the headlight control ECU socket. Connect the connector. Install the swivel motor with the 3 screws. NOTE: Align the cutout parts of the swivel motor shaft with the cutout parts of the reflector to install the swivel motor.
4. INSTALL HEADLIGHT SWIVEL MOTOR Connect the connector. Install the cover with the 3 screws. Fix the headlight control ECU'S power supply wire harness to the headlight interior's clip. Install the headlight control ECU with the 4 screws. NOTE: As the screws are self tapping screws, make sure no fragments enter the interior of the headlight during the procedure. Install the headlight protector with the screw. Fix the headlight control ECU socket's harness to the headlight interior's 2 clips.
5. INSTALL HEADLIGHT LEVELING MOTOR LH Connect the tip of the headlight leveling motor LH with the reflector. Turn the headlight levering motor in the direction indicated by the arrow and install it. Connect the connector.
6. INSTALL FRONT SIDE MARKER LIGHT BULB Turn the front side marker light bulb in the direction indicated by the arrow and install it. Connect the connector.
7. INSTALL CLEARANCE LIGHT BULB Turn the clearance light bulb in the direction indicated by the arrow and install it. Connect the connector.
8. INSTALL FRONT TURN SIGNAL LIGHT BULB Turn the front turn signal light bulb in the direction indicated by the arrow and install it. Connect the connector. Turn the cover in the direction indicated by the arrow and install it.
9. INSTALL NO. 1 HEADLIGHT BULB Connect the connector. Turn the No. 1 headlight bulb in the direction indicated by the arrow and install it. NOTE: Do not touch the glass part of the bulb. Turn the cover in the direction indicated by the arrow and install it.
10. INSTALL DISCHARGE HEADLIGHT BULB Lock the set spring and install the discharge headlight bulb. NOTE: Do not touch the glass part of the bulb. Turn the headlight control ECU in the direction indicated by the arrow and install the socket. NOTE: Install the socket so that the wire harness is pointed downwards. Turn the back cover in the direction indicated by the arrow and install it.
11. INSTALL HEADLIGHT WASHER ACTUATOR SUB-ASSEMBLY (w/ Headlight Cleaner System) (See «INSTALLATION»(ref-349735-S12036885492009120800000) )

HINT

It is possible that a bulb is incorrectly installed, affecting fog light aim. Bulb installation should be considered prior to performing the adjustment procedure.

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1. VEHICLE PREPARATION FOR FOG LIGHT AIMING ADJUSTMENT Prepare the vehicle according to the following conditions: Ensure there is no damage or deformation to the body around the fog lights. Fill the fuel tank. Make sure that the oil is filled to the specified level. Make sure that the coolant is filled to the specified level. Inflate the tires to the appropriate pressure. Unload the trunk and vehicle, ensuring that the spare tire, tools, and jack are in their original positions. Sit a person of average weight (55 kg, 121 lb) in the driver's seat. Vehicles with height adjustable suspension should set the vehicle height to the lowest setting prior to adjusting the fog light aim.
2. PREPARATION FOR FOG LIGHT AIMING Prepare the vehicle: Place the vehicle in a location that is dark enough to clearly observe the cutoff line. The cutoff line is a distinct line, below which light from the fog lights can be observed and above which it cannot. Place the vehicle at a 90° angle to the wall. Create a 10 m (32.8 ft.) distance between the vehicle (fog light bulb center) and the wall. Make sure that the vehicle is on a level surface. Bounce the vehicle up and down to settle the suspension. NOTE: A distance of 10 m (32.8 ft.) between the vehicle (fog light bulb center) and the wall is necessary for proper aim adjustment. If unavailable, secure a distance of exactly 3 m (9.84 ft.) for check and adjustment. (The target zone will change with the distance, so follow the instructions in the illustration.) Prepare a piece of thick white paper (approximately 2 m (6.6 ft.) (height) x 4 m (13.1 ft.) (width)) to use as a screen. Draw a vertical line down the center of the screen (V line). Set the screen as shown in the illustration. HINT: Stand the screen perpendicular to the ground. Align the V line on the screen with the center of the vehicle. Draw base lines (H, V LH, and V RH lines) on the screen as shown in the illustration. HINT: Mark the fog light bulb center marks on the screen. If the center mark cannot be observed on the fog light, use the center of the fog light bulb or the manufacturer's name marked on the fog light as the center mark. H Line (Fog light height): Draw a horizontal line across the screen so that it passes through the center marks. The H line should be at the same height as the fog light bulb center marks of the low-beam fog lights. V LH Line, V RH Line (Center mark position of left-hand (LH) and right-hand (RH) fog lights): Draw two vertical lines so that they intersect the H line at each center mark.
3. FOG LIGHT AIMING INSPECTION Cover the fog light or disconnect the connector of the fog light on the opposite side to prevent light from the fog light that is not being inspected from affecting the fog light aiming inspection. NOTE: Do not keep the fog light covered for more than 3 minutes. The fog light lens is made of synthetic resin, which may melt or be damaged due to excessive heat. Start the engine. Turn on the fog light and check if the cut off line falls within the specified area in the following illustration.
4. FOG LIGHT AIMING ADJUSTMENT Adjust the aim vertically: Adjust the aim of each fog light to the specified range by turning each aiming screw with a screwdriver. NOTE: The final turn of the aiming screw should be made in the clockwise direction. If the screw is tightened excessively, loosen it and then retighten it, so that the final turn of the screw is in the clockwise direction. HINT: If it is not possible to correctly adjust fog light aim, check bulb, fog light unit, and fog light unit reflector installation.

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1. INSTALL FOG LIGHT BULB Turn the fog light bulb in the direction indicated by the arrow and install it to the fog light unit LH.