1993 Lexus LS 400 fuee pressure testing port

Does the voltage on the feul injector on a 1993 lesus LS 400 have to have a pulsing voltage as well as the constant voltage on the flel injector leads. And if so, where is the pulsing voltage comming form for there is a sonstant 12volt across the injectors. Problem is the vehicule is not getting fuel in side the engene, The pump has 40psi of pressure at the tank, Not exactly what it is at the injecotor railing but I have added fuel at the correct point and vehicule will run momentairly.

No there is no voltage on the camshaft sensor nor do I think that there is any voltage on the crankshaft sensor either. I have tried to unplug certain componets to see if it was pulling the voltage down but didn't have any results. Still no voltage. I have tried using a used ecm computer to see if this would work but the problem still consists. I think that the system has to be reset or I have another bad ecm computer. It has locked out the radio & it cannot be reset. That is why I think that it is the computer sysyem. Can it be reset with out having take it to a dealer. This is a 1993 Lexus LS 400. 4speed automatic transmission 4.0 litre V8 engene.