Specifications & Procedures: Other Lexus LS III

EXCEPT IS300 & LS430 (WITH AIR SUSPENSION)

1. Before adjusting wheel alignment, measure riding height. Measure riding height with vehicle on level surface and tires properly inflated. Bounce vehicle several times to allow suspension to settle. (Scheme 1)or (Scheme 2).
2. Visually inspect vehicle for abnormal height difference from front to rear and from side to side. Remove heavy items from passenger and luggage compartments.
3. Measure riding height. See «RIDING HEIGHT SPECIFICATIONS»(ref-128751-S27770216752001110500000) table. If riding height is not within specification, inspect suspension components. Repair or replace as necessary.

Scheme 1

Scheme 2

RIDING HEIGHT SPECIFICATIONS

IS300

1. Measure from ground to front of No. 1 lower suspension arm mounting bolt center (dimension "A"). (Scheme 3) Measure from ground to center of front wheel (dimension "B"). Subtract dimension "A" from dimension "B" for front ride height measurement. See «RIDING HEIGHT SPECIFICATIONS»(ref-128751-S27770216752001110500000) table.
2. Measure from ground to center of rear wheel (dimension "C"). (Scheme 3) Measure from ground to No. 2 lower suspension arm mounting bolt center (dimension "D"). Subtract dimension "D" from dimension "C" for rear ride height measurement. See «RIDING HEIGHT SPECIFICATIONS»(ref-128751-S27770216752001110500000) table.

Scheme 3

Scheme 4

Scheme 5

1. Set height control switch to NORM position. Bounce vehicle up and down several times to stabilize suspension. Push vehicle forward and backward to settle tires.
2. Block wheels. Place transmission in Neutral. Release parking brake. Start engine. Set height control switch to HIGH position. After one minute, with vehicle height in raised position, set height control switch back to NORM position. Wait 50 seconds and repeat this step again.
3. Measure vehicle riding height. (Scheme 2) See «RIDING HEIGHT SPECIFICATIONS»(ref-128751-S27770216752001110500000) table. If riding height is not as specified, adjust vehicle riding height by rotating height control sensor link.
4. To adjust front height control sensor link, loosen 2 lock nuts on height control sensor link. Rotate height control sensor link bolt to adjust length. Length adjustment for front height control sensor link is 2.36" (59.3 mm). See dimension "A" in (Scheme 4). NOTE: Rotating height control sensor link bolt one complete turn changes vehicle height about.20" (5 mm).
5. Ensure height control sensor link dimension "B" is less than.75" (19 mm). (Scheme 4)
6. After adjustment, temporarily tighten lock nuts. Measure vehicle riding height. Readjust if necessary. Tighten lock nuts. See «TORQUE SPECIFICATIONS»(ref-128751-S19447670472001110500000). Ensure ball joint and bracket are parallel when tightening lock nut.
7. To adjust rear ride height, loosen nut on rear height control sensor arm. (Scheme 5) Moving link arm approximately.04" (1.0 mm) changes vehicle ride height by.08" (2.0 mm). After adjustment, temporarily tighten lock nut. Measure vehicle riding height. Readjust if necessary. Tighten lock nut. See «TORQUE SPECIFICATIONS»(ref-128751-S19447670472001110500000)

JACKING & HOISTING

DISABLING AIR SUSPENSION SYSTEM (LS430)

Turn ignition off when jacking or hoisting vehicle. If it is necessary to have ignition on (engine running) when jacking or hoisting vehicle, connect a jumper wire between Data Link Connector No. 3 (DLC3) terminals Tc and CG. DLC3 is located unde left side of instrument panel. (Scheme 6) Turn ignition switch ON and raise vehicle.

Scheme 6

FLOOR JACK

Place floor jack on vehicle support points shown. (Scheme 7), (Scheme 8) or (Scheme 9).

Scheme 7

Scheme 8

Scheme 9

EMERGENCY JACKING

Place manufacturer-supplied jack under reinforced support points of sill, between front and rear wheels. Safety stands may also be placed at these points. (Scheme 7), (Scheme 8) or (Scheme 9).

HOIST

Place lift blocks under reinforced support points of sill, between front and rear wheels. (Scheme 7), (Scheme 8) or (Scheme 9).

Scheme 10

Scheme 11

1. Inspect tires for wear and proper inflation. Inspect front wheel bearings for looseness. Measure tire runout. Tire runout should not exceed.04" (1.0 mm).
2. Inspect front suspension components for looseness. Ensure front shock absorbers operate properly. Measure vehicle riding height. See «RIDING HEIGHT ADJUSTMENT»(ref-128751-S11626691962001110500000).
3. Remove front wheels. Remove speed sensor clamp. Remove 2 lower shock absorber nuts while leaving bolts in place. Coat threads of nuts with engine oil. Temporarily install lower shock absorber nuts. Adjust camber by pushing or pulling lower side of shock absorber in direction camber adjustment is required. (Scheme 10) See «WHEEL ALIGNMENT SPECIFICATIONS»(ref-128751-S05645519982001110500000). Tighten lower shock absorber nuts to specification. See «TORQUE SPECIFICATIONS»(ref-128751-S19447670472001110500000).
4. If camber is still not within specifications, replace camber adjusting bolts. (Scheme 11) Estimate how much additional camber adjustment will be required and select the proper camber adjusting bolt and exchange selected adjusting bolts for original bolts until camber is within specifications. Adjusting value for set bolts is 6'-30' (.1 degree -.5 degree).

Front Suspension (GS300, GS430 & IS300)

Measure and record camber. See WHEEL ALIGNMENT SPECIFICATIONS. If adjustment is necessary, loosen adjusting cam nut at lower suspension arms. Rotate adjuster cam as necessary. (Scheme 12) Tighten adjuster cam bolt. See TORQUE SPECIFICATIONS.

Scheme 12

Scheme 13

1. Inspect tires for wear and proper inflation. Inspect front wheel bearings for looseness. Measure wheel runout. Wheel runout should not exceed.06" (1.4 mm).
2. Inspect front suspension components for looseness. Ensure front shock absorbers operate properly. Measure vehicle riding height. See «RIDING HEIGHT ADJUSTMENT»(ref-128751-S11626691962001110500000).
3. Measure camber of each front wheel. See «WHEEL ALIGNMENT SPECIFICATIONS»(ref-128751-S05645519982001110500000). If camber is not within specification, loosen camber adjusting cam nuts. (Scheme 13) Remove suspension crossmember brace for access if necessary. Turn camber adjusting cam to obtain proper camber adjustment. Tighten adjusting cam nuts to specification. See «TORQUE SPECIFICATIONS»(ref-128751-S19447670472001110500000). Reinstall suspension crossmember brace.

Rear Suspension (ES300 & RX300)

Inspect tires for wear and proper inflation. Measure camber of both rear wheels. See WHEEL ALIGNMENT SPECIFICATIONS . If camber is not within specification, inspect rear suspension components. Replace any components that are worn or damaged. Rear camber is not adjustable.

Rear Suspension (GS300, GS430 & IS300)

Note. On GS300, GS430 and IS300, rear wheel camber and toe-in are adjusted together.

Scheme 14

Scheme 15

1. Inspect tires for wear and proper inflation. Measure lengths of toe control link and No. 2 lower suspension arms. (Scheme 14) Subtract length of dimension "B" from length of dimension "A". Measurement should be 0.16" (4.0 mm ) or less. Adjust by rotating adjuster cams (if necessary). (Scheme 15) Tighten adjuster cam nut. See «TORQUE SPECIFICATIONS»(ref-128751-S19447670472001110500000).
2. Measure toe-in. See «WHEEL ALIGNMENT SPECIFICATIONS»(ref-128751-S05645519982001110500000). If toe-in is not within specification, loosen adjuster cam nut at toe control link. Adjust by rotating adjuster cams. Tighten adjuster cam bolts after adjustment. See «TORQUE SPECIFICATIONS»(ref-128751-S19447670472001110500000).

Rear Suspension (LS430)

Measure and record camber and toe-in. See WHEEL ALIGNMENT SPECIFICATIONS . Rear camber adjustment is made by replacing No. 2 lower suspension arm. See REAR NO. 2 LOWER SUSPENSION ARM REPLACEMENT SELECTION table. Replace No. 2 lower suspension arm (if necessary).

REAR NO. 2 LOWER SUSPENSION ARM REPLACEMENT SELECTION

Front Suspension (ES300, GS300, GS430, IS300 & RX300)

1. Ensure riding height, camber, and steering axis inclination are correct. See «RIDING HEIGHT ADJUSTMENT»(ref-128751-S11626691962001110500000) . Also see «CAMBER ADJUSTMENT»(ref-128751-S16479661922001110500000) and «STEERING AXIS INCLINATION»(ref-128751-S36954131332001110500000) under WHEEL ALIGNMENT PROCEDURES.
2. Measure caster of each front wheel. See «WHEEL ALIGNMENT SPECIFICATIONS»(ref-128751-S05645519982001110500000) . If caster is not within specification, inspect related front suspension components. Replace any components that are worn or damaged. Front caster is not adjustable.

Scheme 16

1. Ensure riding height, camber, and steering axis inclination are correct. See «RIDING HEIGHT ADJUSTMENT»(ref-128751-S11626691962001110500000). Also see «CAMBER ADJUSTMENT»(ref-128751-S16479661922001110500000) and «STEERING AXIS INCLINATION»(ref-128751-S36954131332001110500000) under WHEEL ALIGNMENT PROCEDURES.
2. Measure caster of each front wheel. See «WHEEL ALIGNMENT SPECIFICATIONS»(ref-128751-S05645519982001110500000). Adjust caster (if necessary) by replacing No. 2 bushing bracket. (Scheme 16) Raise vehicle with wheel in full rebound position. Remove nut and washer from rear of lower No. 2 bushing. Remove bolts from right and left sides of lower No. 2 bushing bracket and remove bracket from lower arm.
3. Using a bearing splitter and a press, remove lower No. 2 bushing from bracket. Replace with correct bracket. See «REAR NO. 2 BUSHING BRACKET REPLACEMENT SELECTION»(ref-128751-S21320829802001110500000) table. Reinstall bushing. Install lower bracket into lower arm shaft. Install washer and nut to rear of lower No. 2 bushing and hand tighten. Install two bolts to right and left side of lower No. 2 bushing bracket and tighten to 64 ft. lbs. (87 N.m). Lower vehicle until wheels are completely grounded. Tighten nut to rear of lower No. 2 bushing to 101 ft. lbs. (137 N.m). REAR NO. 2 BUSHING BRACKET REPLACEMENT SELECTION Adjustment Amount (1) Part No. +30° 48652-50040 -30° 48652-50050 (1) Dinension is in degrees.

Front Suspension

Ensure riding height, caster and camber are correct. See RIDING HEIGHT ADJUSTMENT . Also see CASTER ADJUSTMENT and CAMBER ADJUSTMENT under WHEEL ALIGNMENT PROCEDURES. If riding height, caster and camber are correct and steering axis inclination is still not as specified, recheck front knuckle for bend or damage and inspect front wheel bearings for looseness.

Front Suspension (All Models)

1. Ensure riding height, camber, steering axis inclination, and caster are correct. See «RIDING HEIGHT ADJUSTMENT»(ref-128751-S11626691962001110500000) . Also see «CAMBER ADJUSTMENT»(ref-128751-S16479661922001110500000) , «STEERING AXIS INCLINATION»(ref-128751-S36954131332001110500000) and «CASTER ADJUSTMENT»(ref-128751-S11009752622001110500000) under WHEEL ALIGNMENT PROCEDURES. Ensure front wheels are in straight-ahead position.
2. Bounce both ends of vehicle several times to settle suspension. Measure toe-in. See «WHEEL ALIGNMENT SPECIFICATIONS»(ref-128751-S05645519982001110500000) . If necessary, adjust toe-in by changing length of tie rods. Length of tie rods must be equal within .04" (1.0 mm) after adjustment.

Rear Suspension (ES300)

1. Ensure rear camber is correct. See «CAMBER ADJUSTMENT»(ref-128751-S16479661922001110500000) under WHEEL ALIGNMENT PROCEDURES. Bounce both ends of vehicle several times to settle suspension. Adjust lengths of adjuster tubes so both are equal within.04" (1.0 mm). (Scheme 17)
2. Measure toe-in. See «WHEEL ALIGNMENT SPECIFICATIONS»(ref-128751-S05645519982001110500000). If necessary, adjust length of each adjuster tube equally to adjust toe-in.

Scheme 17

Rear Suspension (GS300, GS430, IS300 & LS430)

Toe-in is adjusted together with camber. See CAMBER ADJUSTMENT under WHEEL ALIGNMENT PROCEDURES.

Scheme 18

1. Measure distance between wheel disc and corner of toe-adjusting cam. (Scheme 18) Ensure difference of left and right side is.12" (3.0 mm) or less. If adjustment is necessary, loosen adjusting cam lock bolt and rotate adjuster cam as necessary.

TOE-OUT ON TURNS

1. Ensure steering wheel is in straight-ahead position. Raise front of vehicle. Place turning radius gauges beneath front wheels. Lower front of vehicle.
2. Rotate steering wheel fully right and left, observing turning radius on both wheels. See «WHEEL ALIGNMENT SPECIFICATIONS»(ref-128751-S05645519982001110500000) . If toe-out on turns is not within specification, inspect related front suspension components. Replace any components that are worn or damaged.

ES300

WHEEL ALIGNMENT SPECIFICATIONS (ES300)

GS300 & GS430

WHEEL ALIGNMENT SPECIFICATIONS (GS300 & GS430)

WHEEL ALIGNMENT SPECIFICATIONS (IS300)

LS430

WHEEL ALIGNMENT SPECIFICATIONS (LS430)

RX300

WHEEL ALIGNMENT SPECIFICATIONS (RX300)