check voltage values for tps many are slightly adjustible. see service manual for voltage specs and adjustment. tps is typicaly 0-5v range with a perticular voltage at closed throttle (hot engine) use digital meter type only!! test incoming voltage supply and output voltage returning to cpu. If all incoming and outgoing voltages are correct carefully check all wiring and connectors for that circuit, test retur voltage at cpu if everything else checks out could be cpu (not likely!!).