headlight adjustment requires a rocket scientist?
07-13-11, 07:20 PM
#1
Lead Lap
Thread Starter
headlight adjustment requires a rocket scientist?
So I found the two adjustment screw on the headlight. My headlight aiming is out of whack so I decided to adjust it. Pulled up to a flat wall (25 ft from it) and started turning the **** with screw driver. I turned back and forth many many turns but the image (or headlight) is not moving at all...wtf ? On my tundra I can make a turn and can visibly see the light image moves.
Any idea? Help!!!
Any idea? Help!!!
07-13-11, 09:12 PM
#2
Lexus Fanatic
It was the same with my GS. The dealer did it and said the tech had to turn the thing 100 times to get it to actually move. They got it though. I want to have them adjust my left headlight to match the right.
I would say keep turning it
I would say keep turning it
07-14-11, 12:02 PM
#7
Lead Lap
Thread Starter
So here is the MILLION DOLLARS questions:
1) which **** (the one on the edge of car or the one in the middle toward the radiator) adjust the low beam?
2) turning clockwise or counter-clockwise will raise the headlight (for the **** in #1).
1) which **** (the one on the edge of car or the one in the middle toward the radiator) adjust the low beam?
2) turning clockwise or counter-clockwise will raise the headlight (for the **** in #1).
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07-14-11, 01:45 PM
#8
Lead Lap
Thread Starter
I'm so awesome 
Last Modified: 6-3-2011 6.4 N From: 200708
Model Year: 2008 Model: LS460 Doc ID: RM0000011MI023X
Title: LIGHTING: HEADLIGHT ASSEMBLY: ADJUSTMENT (2008 LS460)
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.
1. CHECK HEADLIGHT
(a) Check that each measurement is within its respective 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
(a) Adjust the headlight fitting.
(1) 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
(a) 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)
(a) 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.
NOTICE:
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.)
(b) 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.
(c) Draw a vertical line down the center of the screen (V line).
(d) 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.
(e) 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.
(1) 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.
(2) 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
(a) 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.
NOTICE:
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.
(b) Start the engine.
(c) 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
(a) Adjust the aim vertically:
Adjust the aim of each headlight to the specified range by turning each aiming screw with a screwdriver.
NOTICE:
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.
Last Modified: 6-3-2011 6.4 N From: 200708
Model Year: 2008 Model: LS460 Doc ID: RM0000011MI023X
Title: LIGHTING: HEADLIGHT ASSEMBLY: ADJUSTMENT (2008 LS460)
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.
1. CHECK HEADLIGHT
(a) Check that each measurement is within its respective 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
(a) Adjust the headlight fitting.
(1) 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
(a) 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)
(a) 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.
NOTICE:
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.)
(b) 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.
(c) Draw a vertical line down the center of the screen (V line).
(d) 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.
(e) 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.
(1) 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.
(2) 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
(a) 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.
NOTICE:
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.
(b) Start the engine.
(c) 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
(a) Adjust the aim vertically:
Adjust the aim of each headlight to the specified range by turning each aiming screw with a screwdriver.
NOTICE:
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.
07-14-11, 01:55 PM
#9
Lead Lap
Thread Starter
Damn the picture didn't show up!!!
anyways, screw closes to front of car is for verticle adjustment...i think.
anyways, screw closes to front of car is for verticle adjustment...i think.
Last edited by randomwalk; 07-14-11 at 02:04 PM.
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