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.
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

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 (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 with cable 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)

DTCs cannot be output (terminals TC and CG of the DLC3 are connected)

TC and CG terminal circuit

IG power source circuit

Meter / gauge system

EPS warning light remains on

EPS warning light circuit

    How To Proceed With Troubleshooting
    CAUTION / NOTICE / HINT HINT: Use these procedures to troubleshoot the power steering system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSH ...

    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 assembl ...

    Other materials:

    Toyota CH-R Service Manual > Tire Pressure Warning System: Terminals Of Ecu
    TERMINALS OF ECU CHECK TIRE PRESSURE WARNING ECU AND RECEIVER (a) Disconnect the M23 tire pressure warning ECU and receiver connector and measure the voltage or resistance on the wire harness side. *a Front view of wire harness connector (to Tire Pressure Warning ECU ...

    Toyota CH-R Service Manual > Audio And Visual System(for Radio And Display Type): Parking Brake Switch Circuit
    DESCRIPTION This circuit is from the skid control ECU (brake actuator assembly) to the radio and display receiver assembly. WIRING DIAGRAM PROCEDURE 1. CHECK ELECTRIC PARKING BRAKE SYSTEM (a) Check the operation of the electric parking brake. Click here ...

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