2022 Hisun Sector 550 eps. Power steering not working

[A P]

Hi

I have a 2022 hisun sector eps 550. 30amp fuse is blown for eps. Checked the motor and it’s fine. Opened up the controller and found a bad diode. Dealer wanted 500$ for the controller. Just posting this in case it helps someone. I couldn’t read numbers from the old one so just took a guess and replaced it with a 100v 3amp diode. 

[A P]

Hi

I have a 2022 hisun sector eps 550. 30amp fuse is blown for eps. Checked the motor and it’s fine. Opened up the controller and found a bad diode. Dealer wanted 500$ for the controller. Just posting this in case it helps someone. I couldn’t read numbers from the old one so just took a guess and replaced it with a 100v 3amp diode. 

[Greg Hall]

Hey, thanks for the info. My 22 rk 750 has had no eps since about April or May, just turned dead left if you let go of the steering wheel. No help at all from hisun in Texas other than tell me to take it back to rk after the mechanic had already  told me twice he had no idea what was wrong with it. Had to have a starter replaced at another dealer closer to home and they said they would check on hisun fixing the eps.  Been about 2 months and haven't heard anything. It's a decent sxs when it works but I would advise anyone to buy another brand and save a huge headache.  Where is the diode located and does it just plug in? Thanks for the info. Sorry you're in the no eps club.

 

[A P]

Hey the diode is in the eps module. And it has to be desoldered. Module is located behind the airbox. It’s the one with three plugs on it. Is your power steering malfunction light on ? 

[Greg Hall]

It does have a code, F0001 and the red steering trouble light is illuminated on the instrument panel. Did your steering wheel turn all the way one way or the other when you let go of the wheel? Mine turned all the way to the left. I called and tried to buy a service manual not long after I bought mine in 2022 but hisun in Texas wouldn't sell me one. Dealers and authorized repair shops only. Paid over 400 to replace the starter because it dragged all the time. Rk mechanic said they all start that way. Any help would be greatly appreciated. And thanks for the info.

[Greg Hall]

Also from day one it has shown a code 0700 when you first start it but no one can tell me what the code is. Bad management and dissemination of info from hisun.

[HISUN Sector 750 EPS Failu]

On 12/16/2023 at 2:28 PM, Greg Hall said:

Hey, thanks for the info. My 22 rk 750 has had no eps since about April or May, just turned dead left if you let go of the steering wheel. No help at all from hisun in Texas other than tell me to take it back to rk after the mechanic had already  told me twice he had no idea what was wrong with it. Had to have a starter replaced at another dealer closer to home and they said they would check on hisun fixing the eps.  Been about 2 months and haven't heard anything. It's a decent sxs when it works but I would advise anyone to buy another brand and save a huge headache.  Where is the diode located and does it just plug in? Thanks for the info. Sorry you're in the no eps club.

 

Wow!!!  Our new-to-us Sector 750, with only 84.4 hours, is doing exactly the same thing.  When you turn the ignition key, the EPS turns hard all the way to the left.

I am in discussion with "Chris" from HISUN . . . I have his email and phone number . . . and with the original selling dealer.

I have sent a short video clip to both of them, showing what happens when I turn the key.

There is no dealer convenient to us and "taking it in" would involve renting a UHaul carhauler.  I have also read horror stories from people who took their HISUN in to a dealer to get a defect fixed.

I'm treating it as a consumer product safety defect, and have reported it to the Consumer Product Safety Commission . . . 20240920-18A7C-2147336406 .

I stumbled onto this thread when I searched if a HISUN can operate with the EPS disconnected.

Our previous UTV, a 2008 Bush Hog TH440, was not a pretty thing, but it was not a death trap!!!!!!

[HISUN Sector 750 EPS Failu]

2 hours ago, HISUN Sector 750 EPS Failu said:

Wow!!!  Our new-to-us Sector 750, with only 84.4 hours, is doing exactly the same thing.  When you turn the ignition key, the EPS turns hard all the way to the left.

I am in discussion with "Chris" from HISUN . . . I have his email and phone number . . . and with the original selling dealer.

I have sent a short video clip to both of them, showing what happens when I turn the key.

There is no dealer convenient to us and "taking it in" would involve renting a UHaul carhauler.  I have also read horror stories from people who took their HISUN in to a dealer to get a defect fixed.

I'm treating it as a consumer product safety defect, and have reported it to the Consumer Product Safety Commission . . . 20240920-18A7C-2147336406 .

I stumbled onto this thread when I searched if a HISUN can operate with the EPS disconnected.

Our previous UTV, a 2008 Bush Hog TH440, was not a pretty thing, but it was not a death trap!!!!!!

Today I intended to try to figure out how to disconnect the EPS, and see if it would operate without power steering, but, instead, the EPS was working.

I drove it apprehensively for about 15 minutes, both hands firmly on the steering wheel, and it never jerked to the left.

But I don't think I can ever drive it without the fear of it doing that.  I certainly won't drive it with speed.

 

BTW, I'm seeing what appears to be that EPS system on Amazon for $1190-ish.

[HISUN Sector 750 EPS Failu]

HISUN arranged to have our Sector 750 picked up and transported back to the original dealer, and are paying for that, parts and labor.

I doubt that they would be if I had not filed a report with the Consumer Product Safety Commission.  People have complained about the same issue with the Texas BBB where HISUN is located, and got no satisfaction.

It was picked up early yesterday>>>>I test-drove it for a couple miles first, and the EPS was operating just fine.  That's always a possibility, which is why I have made three separate videos documenting the issue.

[HISUN Sector 750 EPS Failu]

Our Sector 750 was picked up and taken to the selling dealer 15 days ago, and I haven't heard a thing since.

I got a letter from the Consumer Product Safety Commission today wanting to know more.

Here's complaints at Hisun's home BBB: https://www.bbb.org/us/tx/mckinney/profile/atv/hisun-motors-corp-usa-0875-90395182/complaints?page=1 

 

[HISUN Sector 750 EPS Failu]

[HISUN Sector 750 EPS Failu]

[HISUN Sector 750 EPS Failu]

We got it back, and it seems to be working just fine.  Neither HISUN nor the dealer said what was wrong.

- - - - - -

I decided to do an oil change, and could not even budge the oil drain plug.  I bought an impact wrench yesterday and I couldn't budget it with that.  I couldn't loosen a lug nut either.

Everything on it is way over-torqued.  It's not right.

I'm getting a bigger impact wrench today.

[ELW]

Hi I have Hisun 750 from rural king. The eps light is on and a error code on dash is F0012 power steering is working but the eps light stays on and error code continues to flash. No dealers close any one had this problem are know what to check?

[HISUN Sector 750 EPS Failu]

On 3/20/2025 at 1:17 PM, ELW said:

Hi I have Hisun 750 from rural king. The eps light is on and a error code on dash is F0012 power steering is working but the eps light stays on and error code continues to flash. No dealers close any one had this problem are know what to check?

Sorry, I did not get a notification and don't check here often.

Our problem is that the EPS did whatever it wanted to, meaning it would turn violently all the way.  I reported it to the CPS Commission.  HISUN picked it up, had a dealer repair it, and returned it.

I doubt that the CPS Commission exists under the new administration, as most taxpayer benefits have been eliminated.  I emailed the lady who helped me, to see, and it bounced.