Toyota Yaris: Power Steering System / Problem Symptoms Table

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Steering / Power Assist Systems / Power Steering System / 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

Front tires (improperly inflated, unevenly worn)

Front wheel alignment (incorrect)

Front suspension (Lower ball joint)

Steering gear assembly

Auxiliary battery and power source circuit

Power source voltage of power steering ECU assembly

Power steering ECU assembly

Vehicle condition (Steering wheel is turned from left to right repeatedly with vehicle stopped or heavy load is continuously applied to vehicle)

Heavy Steering (EPS Warning Light (Yellow))

Heavy Steering Feel (EPS Warning Light (Yellow))

Steering effort differs between right and left or is uneven

Power steering ECU zero point calibration not completed

Front tires (improperly inflated, unevenly worn)

Front wheel alignment (incorrect)

Front suspension (Lower ball joint)

Steering gear assembly

Torque sensor (Electric power steering column sub-assembly)

Electric power steering column sub-assembly

Power steering ECU assembly

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

Torque sensor (Electric power steering column sub-assembly)

Power steering ECU assembly

CAN communication system

Friction sounds occur when turning steering wheel during low speed driving

Power steering motor (Power steering ECU assembly)

Electric power steering column sub-assembly

Spiral cable with sensor sub-assembly

Steering column cover contacting steering wheel assembly

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

Power steering motor (Power steering ECU assembly)

Steering wheel installation (incorrect)

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

Power steering motor (Power steering ECU assembly)

Electric power steering column sub-assembly

Steering wheel installation (incorrect)

EPS warning light remains on

EPS warning light circuit

    Calibration

    CALIBRATION POWER STEERING ECU INITIAL SETTING (ASSIST MAP WRITING) (USING GTS) NOTICE: If any of the following conditions are met, perform Power Steering ECU Initial Setting (assist map writing): The power steering ECU assembly has been replaced...

    Terminals Of Ecu

    TERMINALS OF ECU CHECK POWER STEERING ECU ASSEMBLY *a Component without harness connected (Power Steering ECU Assembly) - - (a) Measure the voltage and resistance according to the value(s) in the table below...

    Other information:

    Toyota Yaris XP210 (2020-2022) Reapir and Service Manual: Invalid Data Received from Brake System Control Module Invalid Serial Data Received (U041881)


    DESCRIPTION The millimeter wave radar sensor assembly receives signals related to the brake control condition from the skid control ECU (brake actuator assembly) via the CAN communication line. If the millimeter wave radar sensor assembly receives signals from the skid control ECU (brake actuator assembly) indicating a brake control system malfunction, the millimeter wave radar sensor assembly stores DTC U041881...

    Toyota Yaris XP210 (2020-2022) Reapir and Service Manual: Engine Oil Temperature Sensor Circuit Short to Ground (P019511)


    DESCRIPTION The engine oil temperature sensor (engine oil pressure and temperature sensor) replaces the oil temperature with electrical signals and outputs them to the ECM. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note P019511 Engine Oil Temperature Sensor Circuit Short to Ground The engine oil temperature sensor (engine oil pressure and temperature sensor) output voltage is below 0...

    Categories

    Supplemental Restraint System (SRS) Precautions

    The front and side supplemental restraint systems (SRS) include different types of air bags. Please verify the different types of air bags which are equipped on your vehicle by locating the “SRS AIRBAG” location indicators. These indicators are visible in the area where the air bags are installed.

    The air bags are installed in the following locations:

    The steering wheel hub (driver air bag) The front passenger dashboard (front passenger air bag) The outboard sides of the front seatbacks (side air bags) The front and rear window pillars, and the roof edge along both sides (curtain air bags)

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