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Yes most of the time , 4 months old that twice it’s happened iwent back to the dealer he said was probably just a bad fuse . I guess I will leave it on when not riding thanks for the heads up
 

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I have the exact same issue going on. 2018 570 EPS purchased 4/1/18. Just started blowing fuses 2 weeks ago. Took it back to the dealer to service. Just got a call that they replaced the fuse and multiple test rides w/no issues. I'm feeling like this thing is going to come back and haunt me a lot.
 

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Any luck finding a fix to this? I have a 2018 570 SP that's keeps blowing the EPS fuse. Usually happens when turning sharp at slow speeds.
 

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Try going up one size on the fuse (ie 20 to 25 amp) - sometimes as a system ages it draws more current than it was designed to - usually going up one size on the fuse will not endanger the wiring to the point of destruction. Most wiring is designed to carry more amperage than it is traditionally fused at. If you install a 10 ga wire traditionally rated at 30 amps, today's improved insulation will let that wire safely carry 40 amps. It's not the wire that's in danger of failing, it's the insulation.
 

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Same situation

Any luck finding a fix to this? I have a 2018 570 SP that's keeps blowing the EPS fuse. Usually happens when turning sharp at slow speeds.
I had my EPS fuse blow on my 2018 570sp touring while making a tight U-turn on a trail. I cranked the steering to the left to make the U-turn and gave it some gas and I felt something in the steering change. The steering got really tough and the power steering light was on. Since it was under warranty I brought it to the dealer to let them check it out and to get it documented for further issues. They said it was a blown fuse. I have attached a pic of their repair order. It includes an update flash to the eps. I have taken it out a couple of times since then without issue but I try to take it easy on the tight turning since the steering was a real bear to deal with when it went out. It was way worse then if you had a quad without power steering. It felt like the steering was really fighting me. Luckily I was only a mile away from the truck when it happened.
 

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Mine Too

I also had the fuse blow twice with a slow tight turn, both forward and in reverse. Mine is a 2018 570 as well. Also latebird, these are newer 2018 models. The EPS fuse is 30 amp already. I'm sure more will come out about this.
 

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Not all fuses are created equal. There are are fast blow and slow blow. Fast blow are intended to protect sensitive electronics. Fast blow fuses would be a bad choice in this application. All motors draw a lot more current on startup than they do while running. So the fuse protecting said motor must be able to tolerate that higher current for a break period. Thus the invention of the slow blow fuse. These EPS motors are always starting from a stop. A circuit breaker might also be the way to go. Some of them are specifically built for protecting motors.
 

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Has anyone had a software update done to fix this issue . I have a one in the shop with 300 miles and has blown 2 fuses for eps ...
 
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my EPS light won’t go off now. Was intermittent. Checking fuse and hoping that’s it.
Then again, I need a reflash to see if it will fix my clock that resets everytime I turn the key off.
 

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my EPS light won’t go off now. Was intermittent. Checking fuse and hoping that’s it.
Then again, I need a reflash to see if it will fix my clock that resets everytime I turn the key off.
Check the voltage across the battery terminals - as battery voltage drops amperage drawn increases - low voltage can cause blown fuses.
Rectangle Line Parallel Font Technical drawing


Wires A and B supply power to the unit (fused) - wires 3, 4 and 8 are simply logic inputs to the ECU and have no relationship to POWER SUPPLIED - wire 3 controls the EPS unit either adjusting it's sensitivity for engine or vehicle speed or shutting the unit off when the power supply voltage is too low and possibly too high also - wires 4 and 8 informs the ECU of the voltage on the power supply.


The ECU monitors the function of the EPS, but the power supplied to it has no connection to the ECU. While I am not schooled in the diagnostics or the programming of the ECU from the repair technician standpoint, a blown fuse has to be a connection or voltage related issue. If I had this unit in my shop, I would temporarily install a 14ga wire fused at 30 amps from the battery to the EPS unit and a 14ga ground wire from the EPS unit to the nearest ground (keeping the ground wire as short as possible) and monitor the battery voltage while operating - if the battery voltage drops below 12v, then the battery or charging system may be at fault. If the charging system is functioning and the battery voltage stays between 12.5 and 13v and the fuse blows, then I would point at the EPS unit as being faulty. If the fuse does not blow at any point, then I would point to the wiring as being undersized or having a faulty connection.

These are things that Polaris R&D should be working on, but I suspect the Chinese made wiring harness is constructed of slightly undersized conductors (instead of spec'd 16ga wire, the Chinese use metric gauged wire that is perhaps the equivalent of 15.5ga conductor, or their copper has a higher content of tin (lower quality and cheaper) which has a slightly higher resistance to current flow. Resistance increases heat from current flow and heat increases resistance which increases amperage and an increase in amperage causes the voltage to drop and as the voltage drops the current flow increases. In electricity voltage, current and wattage are all relational; one drops and another increases - one increases and another decreases.

As to the clock resetting when the key is turned off............. I would look for:
Rectangle Font Parallel Slope Pattern


12v on pin 3 24/7 and check continuity to ground on wire 5 to ground
Product Font Parallel Technology Musical instrument

The EPS ground is wire GBF and the speedo ground is wire GABA which goes to the front splice which is connected to the pod splice via GABB which splices to the speedo ground wire GABM - a poor connection at the speedo, pod splice, front splice or terminal block could be the cause of the problem if it's not a loss of voltage on the orange wire KDD
Rectangle Font Parallel Number Music


But the speedo also has a can bus HIGH and LOW input/outputs on pins 1 and 2 which are connected to the ECU, so the ECU might play a part in the clock resetting.

In conclusion, it would be best to take the vehicle to a dealer with the Digital Wrench software to re-flash, correct or monitor the programming of the ECU.

It is a computer controlled vehicle and it will take a computer to make it function as programmed.
 

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Thank you. I will check the fuse to see if she’s blown and then probably bring her in to the dealer.
Warranty good until 11/2022.
 

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@latebird is trying a 35a fuse a bad idea?
 

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@latebird is trying a 35a fuse a bad idea?
No - it's what I was suggesting in post #6 - go up 2.5 to 5 amps on the fuse and see if the fues blows or something gets hot. Another member with a similar problem just posted that he replaced his battery and the problem he had with his display and EPS went away.
 

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