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 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
|
| 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 |
| 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 |
|
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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