HYUNDAI NF 2006
It is unfortunate that I did not have to live practice on the Toyota simulator of the EPS system (Electric Power Steering) and undergo a specialized training course using such equipment:
But on the other hand, when you start to study this system yourself, you have to weed out the seeds from the chaff and you learn a lot of interesting things. And how not to study: before proceeding with the repair of any automobile system, it must be understood. How does it work. What are the “pitfalls”. Pros and cons. Etc. And when I had to deal with the restoration of this system on Hyundai, the basic principles of operation and the device were already put aside in memory:
The principle of operation is clear from these diagrams: the steering wheel is monitored by the Torgue sensor (see the Appendix “… the use of Hall sensors in automotive electric steering systems”), transmits the rotation data to the control unit, and after the comparative analysis and verification with basic settings, gives a command to the electric motor – where and how much to rotate.
Pay attention to the diagram on the left. There is shown a car speed sensor. It is required for the operation of this system: the higher the speed of the car, the less sensitive the steering wheel should be. At high speed, it seems to be “heavier.” By the way, on hydraulic systems the same “trick” was also there, only there switching was done by a hydraulic valve – as soon as the speed became higher, another hydraulic channel entered into operation and the steering wheel turned harder. This is fair and justified, why the steering wheel is spinning as easily and quickly at a speed of 120 km \ hour as when driving at 20 km \ hour, at high speed its “responsiveness” should be dulled. In more modern cars, in addition to the speed sensor, the readings of other sensors can also be taken into account by the control unit. There are a lot of so-called “particulars”, these features are “an unplowed field” for fans of block repairs, you just need to read the forums:
Hello! I have a hyundai, mileage 75,000 km. The ESP lamp is on, the steering wheel is sometimes heavy, people who know say that … Naur Tell me what you can do?
go to the Hyundai service center and do diagnostics for 850 rubles
… yeah … rolled down … looked, felt, said error s1260 and that it is necessary to change the entire unit, it is 65,000 rubles.
But there are common statements on the forums:
Do not be fooled!
contact an alternative parent
It’s not worth repairing yourself ………….. If you don’t have skills, don’t go!
The history of this Hyundai NF is quite ordinary. The car arrived at the workshop with a malfunction: “The lamp on the dashboard is on.” There they looked – EPS is on. And no one asked what was very important – they didn’t ask for a “history of malfunction.” This is the ABC book: to ask the client simple questions: “What did you do with the machine before the malfunction occurred, did you repair something?”, “Were there any accidents?” … and so on. Practice shows that malfunctions are often preceded by “something” that was “before” – they did some repairs and did something wrong … the car was hit and straightened … a lot of things could happen.
In the car service, the error was simply “reset” and sent to the client. And after a while he came again: “The light on the panel is on.” Error C1260. Different scanners translate this error in different ways. It all depends on the software and the class of the diagnostic device. There is software that translates this error as an “abnormal steering wheel sensor”. In Russian. Here, as you like, everyone has their own opinion and their own amount of money.
There is money, there will be a different scanner, and the inscription on the display is different: Steering sensor circuit.
But the client needs to be questioned in more detail. Was there an accident? And what kind of accident? And then what did you do? In what place “did something”? In front? The steering system concerned? Do not know. not in the know … well, let’s see.
When it is not the first time you encounter such errors, the assumption always arises: “they turned the steering wheel”. Slang expression, but understandable to repairmen. Here on such a steering system that in the figure, a purely hydraulic and “old-old” system, one could not be afraid of this
“Twisting the steering wheel”, there, after working with the steering system or with the suspension, you just had to put the steering wheel in the right position.
EPS is an electronic-mechanical system, and as for any electronics, electronic brains always need to start from something, that is, always be in the “correct coordinate system”. For an EPS system, this is a zero point, “zero, starting position.” If for some reason the zero position is knocked down or incorrectly set, then the system will not work.
It was this mistake that was on the car. The scanner showed that the control unit simply “does not see” the zero position, it is knocked down. The “Hyundai EPS” photo shows the same unit that caused the error.
I had to set the correct position with my hands and with the scanner. Disconnect, twist, set. Then I checked. Happened. When the steering wheel was rotated all the way left and right, an error did not occur. As a suggestion, IMHO: after the accident, the car was repaired, some work was done with the suspension or steering, and when everything was assembled back, we just forgot to do everything right. it happens.
In conclusion, I want to share some links on the topic. When you watch live – it’s more clear.
EPS Prius http://www.autodata.ru/autodata.ru/eps_prius.pdf
Failure power steering http://spokoino.ru/articles/obslugivanie_avto/vov_ycilitel_rylya/
Basic Steering Gear Operation http://www.youtube.com/watch?v=B7Ar1VxE4JU&feature=related
Hyundai Power Steering (MDPS) http://www.youtube.com/watch?v=G1S9LhNsN8I
Electric power steering
Electric power steering EPS
Power steering animation
Comparative analysis of the possibilities of using Hall sensors in automotive electric steering systems
understood the malfunction
Belov Sergey Alexandrovich
Moscow region, Losino-Petrovsky
You can call during business hours:
8 – 903 – 774 – 11 – 82
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