Iyunithi yamandla etailgate yiyunithi yamandla esetyenziselwa ukulawula i-tailgate yelori yebhokisi. Isebenzisa ivalve ye-solenoid eneendlela-ezimbini kunye nevalve yokujonga i-electromagnetic ukuqonda izinto ezinje ngokuphakamisa, ukuvala, ukwehla, kunye nokuvula i-tailgate ukugqibezela umthwalo. Ukulayisha kunye nokukhulula umsebenzi. Isantya esihlayo sinokulungiswa ngevalve ye-throttle. Ekubeni iyunithi yamandla ye-tailgate yemoto yenzelwe yona ngokwayo, ineempawu zofakelo olufanelekileyo kunye nokugcinwa, kunye nokusebenza okulula, ngoko ke ifanelekile ukufakwa okuthe tye.