Hyundai Accent (HC): 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 factorCheck itemTrouble symtomExplanationNote
Drop, impact, and overloadMotorAbnormal 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.
ECUCircuit damage
Wrong welding point
Broken PCB
Damaged precise parts
Torque sensorInsufficient steering effortOverload 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
ShaftInsufficient steering effort (Uneven between LH and RH) Do not use the impacted MDPS
Pull/DentHarness
Malfunction-impossible power operation
Malfunction of MDPS
Disconnection between harness connecting portion and harnessDo not overload the harness
Abnormal storage temperatureMotor/ECUAbnormal 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

Other information:

Hyundai Accent (HC) (2017 - 2022) Service Manual: Occupant Classification System (OCS)

- Description In order to make normal activation of airbag system, SRSCM detects DTC(s) for the Occupant Classification System (OCS). If the seat is occupied, OCS detects passenger presences status and send signal to SRSCM via CAN.SRSCM recognizes the signal as 2 (two) different classifications; that is, 1 (Empty or small occupant with child restraint system), 2 (Occupied with large occupant and small occupant).

Hyundai Accent (HC) (2017 - 2022) Service Manual: Description and Operation

- Function NoItemDescription 1Washer Linked Wiper – If the washer switch is pressed ON for 0.06 second with the vehicle mode in IGN2, the wiper relay is turned ON after washer switch ON, and then the wiper relay is turned OFF after wiper parking signal ON. 2MIST Linked Wiper – If the wiper mist switch is pressed ON for 0.6 second with the vehicle mode in IGN2, the wiper relay is turned ON, and then OFF after wiper parking signal ON.

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