Filed Under (Lexus) by admin on 01-10-2010
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Throttle Body And TPS – Remove throttle body, refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES. Throttle Stop Screw – Check that there is no clearance between throttle stop screw and lever with throttle plate in the fully closed position. TPS Screws – Loosen throttle position sensor set screws. TPS Adjustment Connect ohmmeter across throttle sensor terminals E2 and IDL. – Insert a 0.0157 in (0.40 mm) feeler gauge between throttle stop screw and lever. TPS Adjustment – Slowly turn sensor clockwise until ohmmeter shows no continuity. – Tighten sensor set screws. – Check adjustment with the following feeler gauges and note ohm reading: 0.010 in (0.25 mm) – Continuity 0.0335 in (0.85 mm) – No continuity – If desired results cannot be achieved, readjust sensor. If readings still cannot be achieved, replace sensor.
Filed Under (Lexus) by admin on 05-08-2010
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1. (w/ AIR SUSPENSION) MOVE HEIGHT CONTROL ON/OFF SWITCH IN LUGGAGE COMPARTMENT TO “OFF” 2. JACK UP VEHICLE, REMOVE FRONT WHEEL 3. REMOVE FRONT BRAKE CYLINDER AND DISC ROTOR (a) Remove the two bolts and remove the brake cylinder from the steering knuckle. (b) Hang up the brake cylinder using wire, etc. (c) Place matchmarks on the disc rotor and axle hub. (d) Remove the two screws and remove the disc rotor. 4. REMOVE SPEED SENSOR FROM STEERING KNUCKLE 5. CHECK BACKLASH IN BEARING SHAFT DIRECTION Place the dial indicator near the center of the axle hub and check the backlash in the bearing shaft direction. Maximum: 0.05 mm (0.0020 in.) If greater than the specified maximum, replace the bearing. 6. CHECK AXLE HUB DEVIATION Using a dial indicator, check the deviation at the surface of the axle hub outside the hub bolt. Maximum: 0.05 mm (0.0020 in.) If greater than the specified maximum, replace the axle hub.
Filed Under (Lexus) by admin on 16-06-2010
Tags: coil spring,
control arm,
joint checking,
knuckle assembly,
lexus ls 400,
lower arm,
ls400,
macpherson strut,
shock absorber,
shock absorbers,
stabilizer bar,
strut assembly,
strut bar,
suspensions,
wheel bearings
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ES250 suspension is MacPherson strut-type independent suspension, consisting of stabilizer with integrated strut bar, lower arm, performance rod and shock absorbers using coil spring and suspension link. LS400 suspension is a double wishbone-type independent suspension consisting of coil spring, shock absorber, stabilizer bar upper and lower wishbone arms. WHEEL BEARINGS ADJUST (ES250) BALL JOINT CHECKING STABILIZER BAR R & I (ES250) WHEEL BEARING, HUB & KNUCKLE ASSEMBLY STRUT ASSEMBLY LOWER CONTROL ARM & BALL JOINT LS400 suspension is a double wishbone-type independent suspension consisting of coil spring, shock absorber, stabilizer bar upper and lower wishbone arms. NOTE: This article covers conventional suspension. Servicing procedures DO NOT apply to electronic-modulated suspensions.
Filed Under (Lexus) by admin on 15-06-2010
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TESTING DIAGNOSTIC PROCEDURE 1) Before testing transmission, ensure fluid level is correct, shift linkage, throttle cable, neutral switch and idle speed are correctly adjusted. Ensure transfer case linkage and transfer switch (if equipped) are correctly adjusted. Battery must be fully charged for accurate testing. 2) To aid in fault diagnosis, determine if fault is hydraulic, electronic or a combination of both. 3) The electronic control is capable of storing self- diagnostic codes. To determine if a fault is electrical, read any stored diagnostic codes. Repair electrical fault associated with the code. See DIAGNOSTIC CODES. NOTE: Not all electrical faults will cause a diagnostic code to be stored (i.e. throttle position sensor and brake signal). Farther circuit tests may be required See ELECTRICAL COMPONENTS & CIRCUIT.
