Are 2000 C2 Convertible top drive link tests stopped by the speed sensor?

[pricebill]

My convertible top has never worked so today I started testing all systems. I reset the lid potentiometer to 6.2k, manually opened the front latch and told the PIWIS to perform a calibration. The windows begin to lower but they stop moving after a second, triggering the dreaded "Function inactive, end position not reached" error. I tested all of the microswitches and got good results. I moved on to the "Drive links checks" and can move everything (except for the side flaps) but not for more than a second before receiving "Function inactive...etc" errors every time.

 

For some reason the convertible top ECU is receiving an actual speed value of "Speed >5km/h (3mph)". (Highlighted in yellow on the attached screen grab). Is that enough to halt every attempt to perform calibration or drive links checks? I found a DIY from Loren (see below) that said to cut the GREY/ PINK wire leading to the top ECU if you want to eliminate the speed check for top operation. I checked it against the 2000 wiring diagram and made sure it was pin 13 on connector 1. CUT! And there was no change in the Speed value. Still reading above 5km/h - 3mph with the car standing still, parking brake on.

 

Is there something else that will cause "drive link checks" or calibration to last only a moment before returning a "Function inactive, end position not reached" error?

 

Thanks!

 

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Edited March 19, 2022 by pricebill
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