Toyota CH-R Service Manual: 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.
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

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)

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)

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 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)

    On-vehicle Inspection
    ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT STEERING WHEEL FREE PLAY (a) Turn the Engine Start so that the power steering is ready to operate. (b) Stop the vehicle and align the front wheels facing ...

    Steering Wheel
    ...

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