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Mattracks has added a 4wd system and a custom set of EZ-Tracks to a 2013 Smart ForTwo. Intially the car wouls only roll a few feet before the transmission would default to neutral as a result of no wheel speed indicator input . After adding reluctors to the rear, and fabrication of a magnet rings for the front axles, the vehicle will drive, but it shifts into 2nd gear and stays there, and this is with the traction control defeated using the two dash button press and keyswitch to defeat the traction control and ABS. I believe the problem is with the ESP control system, as the reduced diameter of the drive sprockets lead the computer to think the vehicle speed is higher, resulting in a conflict for acceleration.
If anyone has a lead on a ECU that bypasses external sensors for straight throttle control, or suggestions to resolve the operation, please don't be shy....
 

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Mattracks has added a 4wd system and a custom set of EZ-Tracks to a 2013 Smart ForTwo. Intially the car wouls only roll a few feet before the transmission would default to neutral as a result of no wheel speed indicator input . After adding reluctors to the rear, and fabrication of a magnet rings for the front axles, the vehicle will drive, but it shifts into 2nd gear and stays there, and this is with the traction control defeated using the two dash button press and keyswitch to defeat the traction control and ABS. I believe the problem is with the ESP control system, as the reduced diameter of the drive sprockets lead the computer to think the vehicle speed is higher, resulting in a conflict for acceleration.
If anyone has a lead on a ECU that bypasses external sensors for straight throttle control, or suggestions to resolve the operation, please don't be shy....
In a pinch, you can pull the ESP fuse, #11 . This should disable all of the ESP systems, and at least give you an idea if that is an issue.
 
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