OPERATION N° D. IE - 144-0 a: Checking the electronic fuel injection system Op. D.1E-144-0q 1 (BOSCH EFAW 228 - S 10 Test Unit) | D. IE VEHICLES ALL TYPES CHECKING THE ELECTRONIC CONTROL UNIT USING BOSCH EFAW 228 - S 10 TEST UNIT EFAW 228 - S11: Markings in French EFAW 228 - S$ 10 : Markings in English EFAW 218 : Markings in German NOTE: The test unit can be used to check every component of the electronic fuel injection except the electronic control unit itself.