Lexus ES manuals

Lexus ES: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table.
  • Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Power Steering System

Symptom

Suspected Area

Link

Heavy steering

Check assist limit record

Front tires (improperly inflated, unevenly worn)

Front wheel alignment (incorrect)

Front suspension (Lower ball joint)

Rack and pinion power steering gear assembly

Steering effort differs between right and left or is uneven

Rotation angle sensor initialization and torque sensor zero point calibration incomplete

Front tires (improperly inflated, unevenly worn)

Front wheel alignment (incorrect)

Front suspension (Lower ball joint)

Rack and pinion power steering gear assembly

Steering column assembly (for Manual Tilt and Manual Telescopic Steering Column)

Steering column assembly (for Power Tilt and Power Telescopic Steering Column)

While driving, steering effort does not change in accordance with vehicle speed, or steering wheel does not return to its centered position easily

Skid control ECU (Brake actuator assembly)

Speed sensor

Rack and pinion power steering gear assembly

CAN communication system

Friction sounds occur when turning steering wheel during low speed driving

Rack and pinion power steering gear assembly

Steering column assembly (for Manual Tilt and Manual Telescopic Steering Column)

Steering column assembly (for Power Tilt and Power Telescopic Steering Column)

Spiral cable with sensor sub-assembly

Steering column cover contacting steering wheel assembly (for Manual Tilt and Manual Telescopic Steering Column)

Steering column cover contacting steering wheel assembly (for Power Tilt and Power Telescopic Steering Column)

High-pitched sound (squeaking) occurs when turning steering wheel slowly with vehicle stopped

Rack and pinion power steering gear assembly

Steering wheel installation (incorrect)

Steering wheel vibrates and noise occurs when turning steering wheel from lock to lock

Rack and pinion power steering gear assembly

Steering column assembly (for Manual Tilt and Manual Telescopic Steering Column)

Steering column assembly (for Power Tilt and Power Telescopic Steering Column)

Steering wheel installation (incorrect)

Drive mode does not change

Drive mode select switch circuit

EPS warning light remains on

EPS warning light circuit

READ NEXT:

 Terminals Of Ecu

TERMINALS OF ECU TERMINALS OF ECU *a Component without harness connected (Rack and Pinion Power Steering Gear Assembly) - - HINT: The rack and pinion power steering gear assembly uses

 Diagnosis System

DIAGNOSIS SYSTEM CHECK DLC3 (a) Check the DLC3. Click here CHECK WARNING LIGHT (a) When a problem occurs in the power steering system, the EPS warning light in the combination meter assembly comes o

 Dtc Check / Clear

DTC CHECK / CLEAR CHECK DTCs (USING TECHSTREAM) (a) Turn the engine switch off. (b) Connect the Techstream to the DLC3. (c) Turn the engine switch on (IG). (d) Turn the Techstream on. (e) Enter the fo

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 On-vehicle Inspection

ON-VEHICLE INSPECTION PROCEDURE 1. SECURE VEHICLE (a) Fully apply the parking brake and chock a wheel. CAUTION: Make sure to apply the parking brake and chock a wheel before performing this procedure. If the vehicle is not secure and the shift lever is moved to N, the vehicle may suddenly move,

 Disassembly

DISASSEMBLY CAUTION / NOTICE / HINT NOTICE: Before replacing the steering lock actuator assembly, refer to Registration. for Gasoline Model: Click here for HV Model: Click here PROCEDURE 1. REMOVE STEERING LOCK ACTUATOR ASSEMBLY (a) Secure the steering column assembly in a vise between alumin

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