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 Booster with Master Cylinder 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

Pattern select switch sport mode circuit (for NICKEL METAL HYDRIDE BATTERY)

Pattern select switch sport mode circuit (for LITHIUM-ION BATTERY)

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 power switch off. (b) Connect the Techstream to the DLC3. (c) Turn the power switch on (IG). (d) Turn the Techstream on. (e) Enter the foll

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 Inspection

INSPECTION PROCEDURE 1. INSPECT SIDE TURN SIGNAL LIGHT ASSEMBLY LH *a Component without harness connected (Side Turn Signal Light Assembly LH) (a) Apply auxiliary battery voltage to the side turn signal light assembly LH and check that the light illuminates. OK: Measurement Condition

 Sensor (Motor) Failure (Fr Shade) (B2347,B2349)

DESCRIPTION When the roof sunshade ECU (sliding roof drive gear assembly) detects a motor malfunction and the sliding roof operation is stopped, DTC B2347 is stored. When the roof sunshade ECU (sliding roof drive gear assembly) detects a gear position malfunction and the sliding roof operation is st

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