Toyota CH-R Service Manual: Problem Symptoms Table

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)