Hyundai Venue: Motor Driven Power Steering / Description and operation

Hyundai Venue (QX) (2020-2022) Service Manual / Steering System / Motor Driven Power Steering / Description and operation

Description
MDPS (Motor Driven Power Steering) system uses an electric motor to assist the steering force and it is an engine operation independent steering system.
MDPS control module controls the motor operation according to information received from the each sensor and CAN (Controller Area Network), resulting in a more precise and timely control of steering assist than conventional engine-driven hydraulic systems.
Components (Torque Sensor, Fail-safe relay, etc.) of the MDPS system are located inside the steering column & MDPS unit assembly and the steering column & MDPS unit assembly must not be disassemble to inspect or replace them.


Operation
Note With Regard to diagnosis
Trouble factor
Check item
Trouble symtom
Explanation
Note
Drop, impact, and overload
Motor
Abnormal noise
Visable or unvisable damage can occur.The steering wheel could pull to one side by using the dropped parts.
Precise parts of motor/ECU are sensitive to vibration and impact.
Overload can cause unexpected damage
Do not use the impacted MDPS.
Do not overload each parts.
ECU
Circuit damage
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 MDPS
Shaft
Insufficient steering effort (Uneven between LH and RH)
 
Do not use the impacted MDPS
Pull / Dent
Harness
Malfunction-impossible power operation
Malfunction of MDPS
Disconnection between harness connecting portion and harness
Do not overload the harness
Abnormal storage temperature
Motor/ECU
Abnormal steering effort by improper operation of the motor/ECU
Waterproof at the normal condition
Even a little moisture can cause malfunction of the precise parts of the motor/ECU
Keep the normal temperature and proper moisture, while storaging
Avoid drowning

    Motor Driven Power Steering

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    Schematic diagrams

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