Hyundai Tucson: Electric Power Steering / Description and Operation
Hyundai Tucson (LM) 2010-2015 Service Manual / Steering System / Electric Power Steering / Description and Operation
| Description |
EPS (Electric power steering, Column assist type) system uses
an electric motor to assist the steering force and it is an engine
operation independent steering system.
EPS 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
(Steering Angle Sensor, Torque Sensor, Fail-safe relay, etc.) of the EPS
system are located inside the steering column & EPS unit assembly
and the steering column & EPS unit assembly must not be disassemble
to inspect or replace them.
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 EPS.- 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 EPS | |
| Shaft | Insufficient steering effort (Uneven between LH and RH) | | Do not use the impacted EPS | |
| Pull/Dent | Harness | - Malfunction-impossible power operation- Malfunction of EPS | 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 |
1. Do not impact the electronic parts, if they are dropped or impacted, replace them with new ones.
2. Avoid heat and moisture to the electronic parts.
3. Do not contact the connect terminal to avoid deformation and static electricity.
4. Do not impact the motor and torque sensor parts, if they are dropped or impacted, replace them with new ones.
5. The connector should be disconnected or connected with IG OFF.
Components and Components Location
Components
1. Steering wheel2. Steering column3. ECU4. Motor5. Steering gear box
...
Other information:
Hyundai Tucson (LM) 2010-2015 Service Manual: Flex Steer Components and Components Location
Components Location
1. Flex Steering Switch
...
Hyundai Tucson (LM) 2010-2015 Service Manual: Accelerator Position Sensor (APS) Schematic Diagrams
Circuit Diagram
(M/T)
(A/T)
...
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