My toyota sienna 1998 speedometer is not reading and all the abs censors has been changed yet not resolved and its not allowing the gear select well,what can i do now?

first disconnect the battery from the side of the Earth... The second step is to disarm the tachometer and disconnect the three cables....then connect the tachometer again without the battery...then connect the battery ground wire and start the car... If your problem has not been fixed simple you have to put the scanner and the codes will be fine again