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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Other materials:

Toyota CH-R Service Manual > Audio And Visual System(for Radio And Display Type): Reverse Signal Circuit
DESCRIPTION The radio and display receiver assembly receives a reverse signal from the park/neutral position switch. WIRING DIAGRAM PROCEDURE 1. CHECK BACK-UP LIGHT (a) Move the shift lever to R and check if the back-up lights come on. OK: The back-up ligh ...

Toyota CH-R Service Manual > Immobiliser System(w/ Smart Key System): Antenna Coil Open / Short (B2784)
DESCRIPTION When an open or short circuit is detected in the transponder key amplifier coil built into the engine switch, the certification ECU (smart key ECU assembly) stores this DTC. This DTC is also stored as a history DTC. DTC No. Detection Item DTC Detect ...

Toyota CH-R Service Manual: Problem Symptoms Table

On-vehicle Inspection

Steering Wheel

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Toyota CH-R Service Manual