I have a 1996 ES 300 lexus and it won't stay started tired ignition coil cam/crank coils still wont start.

SOURCE: 1996 1500 ram wont start

there is also a crank sensor that can keep it from sparking. are you getting voltage to the coil

SOURCE: no start, no spark, no signal to the coil

there is a fuse that works the battery try checking if it is still good

SOURCE: 1992 dodge 318 engine turns over, but no start. No

if truck has a ceramic ballist resistor near and connected to coil this could be problem or the crk posistion sensor could be too, i would change ballast first if you have on your truck appx cost $10

SOURCE: engine died & wont start no spark ignition coil tested good

try your ignition module in the distributor much more likely. just install rebuilt distributor if that is the problem , if you just replace module the main distributor assem will **** out shortly after.
Make sure you check for broken timing belt also it is one of those two!

SOURCE: 1996 Jeep Grand Cherokee No Start

I would be thinking that there is a good chance that you need to be checking out replacing the computer, if you aren't getting any communication with the proper scan tool then the computer isn't communicating with anything in the vehicle...... I would have guessed first off that the ignition control module might be bad but that is obviously part of the computer also, I would be looking in that direction.