Auto wipers don’t work
 

2012 Mazda CX9. I already looked for the answer but cannot find it. My wipers work fine on all settings except auto. They don’t work in auto at all. I checked the module and it’s affixed to the windshield just fine. I cleaned the windshield and checked for chips/cracks. I plugged in an OBD2 reader and found no issues. Could it be the rain sensing module or that section of the wiper motor? Is there a way to test either?