Toyota Yaris: Power Steering System / Fail-safe Chart

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Steering / Power Assist Systems / Power Steering System / Fail-safe Chart

FAIL-SAFE CHART

If a problem occurs in the power steering system, the power steering assist will be stopped or the amount of power assist will be decreased to protect the system.

Power Steering System

Malfunction

Fail-safe Operation

EPS warning light

Buzzer

  • Torque sensor (electric power steering column sub-assembly) malfunction
  • Power steering motor (power steering ECU assembly) malfunction
  • Power steering ECU assembly malfunction

Power steering assist stops or assist amount is limited

Red or yellow

Sounds intermittently or once

  • Vehicle speed signal malfunction
  • Skid control ECU (brake actuator assembly) malfunction
  • Decrease in battery voltage (not malfunction)

Power steering assist is temporarily limited

Yellow

Sounds once

HINT:

  • If the power steering assist stops, the EPS warning light comes on (red).
  • If the amount of power assist is reduced, the EPS warning light comes on (yellow) and a vibration or sound may occur.
  • The amount of power assist may be decreased to prevent the motor and ECUs from overheating if the steering wheel is continuously turned when the vehicle is either stopped or being driven at a low speed, or if the steering wheel is kept at either full lock position for a long time. In such cases, the amount of power assist returns to normal when the steering wheel is not turned for approximately 10 minutes with the engine running.
  • If the auxiliary battery is not sufficiently charged or the voltage decreases temporarily, the amount of power assist will be reduced and the EPS warning light will come on. In such cases, the amount of power assist returns to normal when the auxiliary battery voltage recovers.

    Freeze Frame Data

    FREEZE FRAME DATA FREEZE FRAME DATA NOTICE: It is difficult to show the specified values (judgment values) clearly because freeze frame data values change significantly due to differences in measurement conditions, surroundings, or vehicle conditions...

    Data List / Active Test

    DATA LIST / ACTIVE TEST DATA LIST HINT: Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts...

    Other information:

    Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Data List / Active Test


    DATA LIST / ACTIVE TEST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. HINT: Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts...

    Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Lost Communication with Image Processing Module "A" Missing Message (U023A87)


    DESCRIPTION The millimeter wave radar sensor assembly is connected to the forward recognition camera via the CAN communication line. If the millimeter wave radar sensor assembly receives signals indicating that its communication with the forward recognition camera is abnormal, the millimeter wave radar sensor assembly stores DTC U023A87...

    Categories

    Refueling

    Before refueling, close all the doors, windows, and the liftgate/trunk lid, and switch the ignition OFF.

    To open the fuel-filler lid, pull the remote fuel-filler lid release.

    Toyota Yaris. Refueling

    To remove the fuel-filler cap, turn it counterclockwise. Attach the removed cap to the inner side of the fuel-filler lid.

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