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Power Steering- RXC/SR10

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Bill Snead
(@bill-snead)
Eminent Member
Joined: 7 months ago
Posts: 23
Topic starter  

Hello-

Need some input on the power steering assistance. I have an RXC Spyder.

I honestly can't tell the difference between the 0 setting and maximum at +5. Should there be a notable difference? Does it work when the car is stationary or must it be in motion? Ignition need to be on, engine running or just power? I see the electric steering assist motor attached to the steering column but not sure how to check it.

Not sure if mine is working, not sure how to check it. Any feedback would be great.

Thank you!


   
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Nikki Schumann
(@nick02)
Estimable Member
Joined: 4 years ago
Posts: 82
 

I don't have specific experience with a Spyder but I believe the power steering is identical in the RXC Coupé...

If so there should be a substantial difference between the 0 and +5 settings. Power steeing should work with Power ON, even with engine turned off but it is quite energy hungry, therefore better to have the engine running when using it. It should also work when car is stationary.

See if the Battery voltage changes (on your dash) when you toggle the switch out of the "0" position... This should be an indicator that the system is wired and using power...


   
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Bill Snead
(@bill-snead)
Eminent Member
Joined: 7 months ago
Posts: 23
Topic starter  

Thanks Nikki for the insight! Not getting any voltage differences with the switch turned on to +5. Feel no real difference so appears this needs to be sorted. Will update here when I find a resolution.

 


   
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Bill Snead
(@bill-snead)
Eminent Member
Joined: 7 months ago
Posts: 23
Topic starter  

Issue sorted!

Reached out to Radical and they advised to check the EPAS ECU 31 pin plug. I found 12V at pin 1-2 as required and the harness was fine. There was no power going from the ECU to the Motor. Fortunately on the EPAS harness I found the manufacturer...DCE Motorsport Electronics (DCEMotorsport.com). They are based in the UK however have another facility in N. Carolina. I reached out and they immediately responded and requested I send in the ECU for evaluation. They found that an overvoltage situation had occurred (malfunctioning alternator replaced just prior) and the ECU was repaired for a very reasonable charge...1/10 of a new ECU!

Reinstallation with calibration was simple. Connect the ECU, raise the wheels off the ground, then cycle power on and off 7 times. You must power off BEFORE the EPAS LED turn off on the dash. The LED will flash several times showing calibration has been completed. Works perfect now.


   
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CharleyH
(@charleyhradicalsportscarregistry-com)
Noble Member Admin
Joined: 4 years ago
Posts: 1656
 

@bill-snead, Great job!  That was some great detective work.


   
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