Normal would be 500 to 1500 ohms on each valve, yes all should have the same reading.
Yours are a bit low, also the water inlet valve can fail physically, watch this video:
Refrigerator not making ice or not dispensing water? This video demonstrates how to test a water inlet valve on a refrigerator. Learn more from the experts at Repair Clinic.
So before you replace the water inlet valve you will want to follow the video and take the water supply line off and put it in a bucket and test the water pressure, it should be a good strong stream coming out.
Here's the water inlet valve for your model:
242252702 Water Valve
Let us know what you find.