Toyota CH-R Service Manual: Problem Symptoms Table

Toyota CH-R Service Manual / Steering Column / 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.

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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Toyota CH-R Service Manual > Navigation System: 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. NG ...

Toyota CH-R Service Manual > Lin Communication System: Rear Door RH ECU Communication Stop (B2323)
DESCRIPTION This DTC is stored when LIN communication between the power window regulator motor assembly (for rear RH door) and main body ECU (multiplex network body ECU) stops for 10 seconds or more. DTC No. Detection Item DTC Detection Condition Tro ...

Toyota CH-R Service Manual: Problem Symptoms Table

On-vehicle Inspection

Steering Wheel

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Toyota CH-R Service Manual