incorrect VSS over 160kph(100mph)

[Gacky]

I have a problem about incorrect VSS over 160kph(100mph).

Please see attached fpdl file.
I took this log file at Fuji Speedway, Japan. Actual max speed was 216kph(134mph) but FlashPro calcurated same value over 160kph(100mph).

I confirmed 180kph on genuine speedometer. It's limited until 180kph on JDM S2K so it can't indicate over 180kph on speedometer.

Thanks.

[Hondata]

Does the cluster speed show correctly over 100 mph?

[Gacky]

Yes, the cluster speed show correctly until 180kph(111.9mph).
I checked the vehicle speed by GPS logger (Driftbox).

I attached .fpcal data for further information.

[Spunkster]

Is anything connected to the wiring of the car that might interfere with the VSS signal?

[Hondata]

We've tested the JDM code in a US ECU and that works to 255 kph, so it probably is the JDM ECU itself.

[Gacky]

Probably nothing is connected to the wiring of the VSS signal (transmission pick-up sensor to ECU wiring). I bought secondhand S2K and I don't know everything of my car.

The gear position is also incorrect, so I think ECU actually calculate this VSS value. But it's very strange that ECU work only up to 160kph...

[Spunkster]

You probably have a speed limit removal device installed on the car that is interferring with the the proper speed signal.

https://www.google.com/#q=jdm+s2000+speed+limit+removal

[Gacky]

I took off the upholstery near ECU and looked around. I found speed limit removal unit!

Thank you very much!!!

[Hondata]

Glad it is fixed; thanks for the follow up.