Erratic speedometer and tach help.
My speedometer and tachometer have started to have a mind of there own. Sometimes the speedometer will not read correctly, then the tach will do the same. Sometimes both, other times just the speedo. Checked the archives and only found info relating to speedometer and the speed sensor. Could this be related to a capacitor on the board?
Any suggestions or help appreciated.
Kurt
95 525ia 165k
Don't know, why the tach issue? ...
speed sensor signal is received by the dash board, processed and sent to all speed dependent devices, including the OBC. Is the OBC working fine? When you get a weird behavior, set the speed limit to the actual speed (set speed limit mode and press S/R). If OBC shows proper speed, there should be no issues with the speed sensor. Vice-versa is not necessarily true.
Javier
Check this link on OBC hidden functions.