1994 e-320 no start but cranks over

[omar090]

I did some work on the coolent side of the engine took the radiator out and cleaned also cleaned the condenser coil. also put in new aux. heatpump and valve the one by the battery. put it back togather and now no start. It cranks but will not run.
I get a code 17(data exchange malfunction between individual control module)
and with the code reader I built on pin 8 the light is on with out pushing the button. It gets a little brighter when I do push the button.
Any thoughts would be helpfull Thanks