Whirlpool dishwasher wash pump not engaging

Whirlpool dishwasher wash pump not engaging

I have a Whirlpool ADP4601 dishwasher that, when you start a cycle, momentarily operates the drain pump, fills up with water and then after a few minutes, drains all of the water back out regardless of wash cycle. I have ran the Whirlpool diagnostics test. The test runs fine other than the wash motor does not engage.