Lexus IS250 IS220d GSE20 ALE20 - SUPPLEMENTAL RESTRAINT SYSTEM

If the front airbag sensor has been dropped, or there are any cracks, dents or other defects in the case, bracket or connector, replace it with a new one.

When installing the front airbag sensor, be careful that the SRS wiring does not interfere with other parts and that it is not pinched between other parts.

Check that there is no looseness in the installation parts of the front airbag sensor.

2. INSTALL HEADLIGHT ASSEMBLY

Install the headlight assembly with the headlight bracket pin.

Install the 3 bolts.

Connect the connector.

3. INSTALL FRONT BUMPER ASSEMBLY

4. INSTALL FRONT UPPER FENDER PROTECTOR LH

Engage the claw and the 3 clips, then install the front upper fender protector LH.

Engage the clip on the rubber portion of the cowl top ventilator louver sub-assembly to the front fender protector upper LH.

5. INSTALL ENGINE ROOM SIDE COVER LH

6. INSTALL COOL AIR INTAKE DUCT SEAL

Install the intake duct seal with the 11 clips.

7. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

8. INSPECT SRS WARNING LIGHT

Inspect the SRS warning light .

9. VEHICLE PREPARATION FOR HEADLIGHT AIM 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.

Place the spare tire, tools, and jack in their original positions.

Unload the trunk.

Sit a person of average weight (75 kg, 165 lb) in the driver's seat.

10. PREPARATION FOR HEADLIGHT AIMING (Using a tester)

Prepare the vehicle according to the following conditions:

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 25 m (82 ft) distance between the vehicle (headlight bulb center) and the wall.

Place the vehicle on a level surface.

Bounce the vehicle up and down to settle the suspension.

NOTICE:

A distance of 25 m (82 ft) between the vehicle (headlight 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 screen (V line).

Set the screen as shown in the illustration.

Front Airbag Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

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 line, V LH, 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).

11. PREPARATION FOR HEADLIGHT AIMING (Using a screen)

Prepare the vehicle according to the following conditions:

Place the vehicle at a 90° angle to the wall.

Create a 25 m (82 ft) distance between the vehicle (headlight bulb center) and the wall.

Place the vehicle on a level surface.

Bounce the vehicle up and down to settle the suspension.

NOTICE:

A distance of 25 m (82 ft) between the vehicle (headlight 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 screen (V line).

Set the screen as shown in the illustration.

Front Airbag Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

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 line, V LH, V RH lines) on the screen as shown in the illustration.

HINT:

The base lines differ for "low-beam inspection" and "high-beam inspection."

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).

12. INSPECT HEADLIGHT AIMING

Cover the headlight or disconnect the connector of the headlight on the opposite side to prevent light from the headlight not being inspected from affecting headlight aiming inspection.

NOTICE:

Do not keep the headlight covered for more than 3 minutes. The headlight lens is made of synthetic resin, and may easily melt or be damaged due to 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 make sure that the cutoff line falls within the specified area, as shown in the illustration.

Front Airbag Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

HINT:

Alignment distance is 25 m (82 ft):
The cutoff line is 48 mm (1.88 in.) to 698 mm (27.48 in.) below the H line with low-beam (ECE Reg.48).

Alignment distance is 3 m (9.84 ft):
The cutoff line is 6 mm (0.23 in.) to 84 mm (3.3 in.) below the H line with low-beam (ECE Reg.48).

Alignment distance is 25 m (82 ft):
The cutoff line is 249 mm (9.8 in.) below the H line with low-beam.

Alignment distance is 3 m (9.84 ft):
The cutoff line is 30 mm (1.18 in.) below the H line with low-beam.

Since the low-beam light and the high-beam light are a unit, if the aim on one is correct, the other should also be correct. However, check both beams just to make sure.

13. ADJUST HEADLIGHT AIMING

Adjust the aim vertically:

Adjust the headlight aim into the specified range by turning aiming screw A 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:

Perform low-beam aim adjustment.

The headlight aim moves up when turning the aiming screw clockwise, and moves down when turning the aiming screw counterclockwise.

Adjust the aim horizontally:

Adjust the headlight aim into the specified range by turning aiming screw B 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:

Perform low-beam aim adjustment.

14. VEHICLE PREPARATION FOR FOG LIGHT AIM

Prepare the vehicle:

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.

Place the spare tire, tools, and jack in their original positions.

Unload the trunk.

Sit a person of average weight (75 kg, 165 lb) in the driver's seat.

15. PREPARATION FOR FOG LIGHT AIMING

Prepare the vehicle according to the following conditions:

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 25m (82 ft) distance between the vehicle (fog light bulb center) and the wall.

Place the vehicle on a level surface.

Bounce the vehicle up and down to settle the suspension.

NOTICE:

A distance of 25 m (82 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 screen (V line).

Set the screen as shown in the illustration.

Front Airbag Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

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 line, V LH, 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.

16. INSPECT FOG LIGHT AIMING

Cover the fog light or disconnect the connector of the fog light on the opposite side to prevent light from the fog light not being inspected from affecting fog light aiming inspection.

Start the engine.

Turn on the fog light and make sure that the cutoff line falls within the specified area, as shown in the illustration.

Front Airbag Sensor - Installation. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

17. ADJUST FOG LIGHT AIMING

Adjust the fog light aim into the specified range by turning the 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.

18. PERFORM INITIALIZATION

Perform initialization .

HINT:

Some systems need initialization after reconnecting the cable to the negative battery terminal.