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: Description and Operation

- Description System Overview The System offers the following features: – Human machine interface through a 1-stage button, for terminal switching and engine start. – Control of external relays for ACC / IGN1 / IGN2 terminal switching and STARTER, without use of mechanical ignition switch. – Steering column locking with an ESCL device; Monitoring of the vehicle status to insure safe activation of the ESCL.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Alternator

- Specification ItemSpecification Rated voltage13.5V, 130A Speed in use 1,000 - 18,000 rpm Voltage regulatorIC Regulator built-in type Regulator Setting VoltageExternal mode 10.6 - 16 ± 0.3V Internal mode14.5 ± 0.3V Temperature GradientExternal mode0 ± 2 mV / °C  Internal mode-3.5 ± 2 mV / °C - Description The Alternator has eight built-in diodes, each rectifying AC current to DC current.

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