Note With Regard to Diagnosis

Trouble factor	Check item	Trouble symptom	Explanation	Note
Drop, impact, and overload	Motor	Abnormal noise	Visible or invisible damage may occur. The steering wheel may pull to one side when dropped parts are used. Precise parts of motor/ECU are sensitive to vibration and impact. Overload may cause unexpected damage.	Do not use the impacted EPS.
	ECU	Circuit damage		Do not overload each part.
		Wrong welding point
		Broken PCB
		Damaged precise parts
	Torque sensor	Insufficient steering effort	Overload to INPUT shaft can cause malfunction of the torque sensor	Do not impact the connecting parts (when inserting and torquing).
				Use the specified tool to remove the steering wheel. (Do not hammer on it.)
				Do not use the impacted EPS.
	Shaft	Insufficient steering effort (Uneven between LH and RH)		Do not use impacted EPS
Pull/Dent	Harness	Malfunctioning	Disconnection between harness connecting portion and harness	Do not overload the harness
		Power operation impossible
		Malfunction of EPS
Abnormal storage temperature	Motor/ECU	Abnormal steering effort by improper operation of the motor/ECU	Waterproof at normal condition	Maintain normal storage temperature and humidity.
Abnormal storage temperature	Motor/ECU		Even a slight moisture can cause malfunction in precise parts of the motor/ECU	Avoid submerging in water

Do not impact the electronic parts. If they are dropped or impacted, replace them with new ones.
Avoid heat and moisture to the electronic parts.
Do not contact the connect terminal to avoid deformation and static electricity.
Do not impact the motor and torque sensor parts. If they are dropped or impacted, replace them with new ones.
The connector should be disconnected or connected with ignition OFF.