I have seen this on my unit. There was water in the drip pan under the dishwasher. Water in the drip pan comes from a leak. In my case, the water valve was getting so old that it was letting too much water into the unit when it was trying to fill. This cause the filling station to over flow into the drip pan.
A quick fix - I removed the water from the drip pan under the unit and I was able to turn down on the supply valve in the basement to limit how much water could come in. This allowed the unit to run without overflowing. I will replace the water valve soon.
Other possibilities, the float device used to detect too much water in the drip pan or too much water in the unit is stuck in the too full position. Or the pump out pump is stuck and not moving water.
It is possible that the machine does not start off the cycle because there are errors due to feedback from the inputs. For the program to start up the main program controller must initiate the INLET/MOTOR/DRAIN pump/ valve to open up and allow each function to be driven starting from the flow of water into the drum as also the drain valve to open to exit the water at the point of the program cycle. If this does not happen then the voltage at the valve/motor/pump must be checked or the fault relates to no voltage from the controller. This means the controller is a suspect.
The fault relates to a suspected program controller unit as it seems to skip the program but it also points out to a drain pump that does not work even with power from the controller. If there is intermittent power to the drain valve/pump then the program controller unit is a suspect.
Cleaning a pump: http://www.youtube.com/watch?v=zKjKi50YBpI&NR=1&feature=fvwp
Replacing the pump on a Bosch machine, please check this link for tips:
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