nisscan.com

I haven't yet tried to trace the wires from the speed sensor but will do so. However, 2 days ago I bought a 1991 300ZX TT A/T in near mint condition. It also returns zero for the speed. The speedo is correct in both cases to 1% against GPS and that signal must come from the speed sensor. All other ...

On the "trip Computer" thread. Tom gives the link for the 1.63beta:
http://home.exetel.com.au/nds/NDSI/down ... 3Beta2.zip

On my 1990 300ZX TT auto, the speed sensor reads zero on road tests. However, the speedometer reads correctly to 1-2% againast a GPS calibration. The same speed sensor reading is obtained from Conzult-free so the problem is not with Datascan I. I'm using version 1.63beta but the result is the same ...