2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 167Get this manual
500 EFI FUEL SYSTEM Using TPS Test Adapter Harness 2201519 Set up the TPS Test Harness 2201519 according to the instructionsVerify that the volt battery is newFigure Tester 2201519
TPS TesterCorrect Reference Voltage
A volt reference voltage signal from the test harness is required for the TPS test to be accurateRefer to the instructions provided with the TPS Test Adapter Harness (2201519) or follow these steps to check reference voltage Harness Test: Insert black voltmeter probe into the "Bk" test port Connect the red meter probe into the "R" port and verify the voltage is 4.99-5.01 vdcIf this reading is low, verify the volt battery is good or try new volt battery