Steering Rack - Reprogramming ECU

[Uncle_Bob]

Question:
Can the ECU be reprogrammed to accept a standard steering racks angles rather than the Cupra R quick rack angles?

Explanation:
To elaborate on the above I have a Seat Leon Cupra R which come with a quick steering rack as many of you know. The rack has been replaced with a standard rack and the traction control light is on constantly, fault showing as steering angle incorrect. Can the ECU be reprogrammed to accept the new standard steering angles? OR possibly could I replace the angle sensor behind the steering wheel to resolve? Is the steering angle sensor the same in LCR and standard Cupra?

Background Story:
The steering rack started leaking on my LCR I found (what at the time seemed like a good deal) another quick steering rack had it replaced via a garage. The traction light came on and stayed on, garage said it'll go after after a few miles ... It didn't. So I connected the VCDS tool and kept getting the error msg about steering angle being off by 30° either way, leading me to believe that the steering rack I bought wasn't a quick rack and was just a standard rack. Now rather than having to spend a big whack on sourcing and replacing the rack again. I was thinking is there any other cheaper fix for the issue. The quickness of the steering doesn't really bother me, I'm quite happy driving without the extra sharpness so to say.

 

[Yellow fr]

Have you tried to reset the angle sensor I had a std rack in mine and replaced with a quick rack and set the angle sensor and light went out and stayed out


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[300bhpdaily]

Can’t you reprogram the steering angle sensors I’ve used the feature on the diagnostic machine. However I’ve never tried it on a part that wasn’t meant to be there.

 

[Thai-wronghorse]

Just wanted to point out that the steering angle sensors differ on the Cupra / FR and the Cupra R so if you're running a standard lock steering rack you may struggle with ditching the fault code until this swapped over.

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[Thai-wronghorse]

Also as this sensor is linked to the ESP / traction control it may even involve swapping the ABS pump to the Cupra one which has TCS.

Personally I'd source the correct steering rack before pulling the other bits out.
Used ones don't even cost much.

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[Uncle_Bob]

Can’t you reprogram the steering angle sensors I’ve used the feature on the diagnostic machine. However I’ve never tried it on a part that wasn’t meant to be there.

Thanks for the reply. I have the free version of VCDS, so this only allows me to clear the code (which returns straight after clearing) I'm based in Manchester, so if anyone knows someone local that has a diagnostic tool or full version of VCDS, enthusiast / garage that could take a look? If what you advise will definitely clear I would be tempted to buy full version of software myself

 

[Uncle_Bob]

Just wanted to point out that the steering angle sensors differ on the Cupra / FR and the Cupra R so if you're running a standard lock steering rack you may struggle with ditching the fault code until this swapped over.

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Thanks for confirming this, as mentioned I did contemplate just changing the angle sensor behind the steering wheel. So if I did would that clear the fault or would I still require some sort of ECU angle sensor reset or reprogramming to accept the new slower turning angles?

 

[Thai-wronghorse]

Thanks for confirming this, as mentioned I did contemplate just changing the angle sensor behind the steering wheel. So if I did would that clear the fault or would I still require some sort of ECU angle sensor reset or reprogramming to accept the new slower turning angles?

I'll be totally honest, I don't know as ive never come across anyone carrying out what essentially is a downgrade to the steering set up.

I have a couple of the angle sensors available here if you wanted to give it a go though?

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[Uncle_Bob]

I'll be totally honest, I don't know as ive never come across anyone carrying out what essentially is a downgrade to the steering set up.

I have a couple of the angle sensors available here if you wanted to give it a go though?

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I dont want to downgrade but after being quoted £450 for a remanufactured OEM steering rack (including fitting) I'm looking for a cheaper option. Sourcing a reliable steering rack is also a concern don't want to end up with another standard rack being advertised as the more expensive quick rack