Home >> Volkswagen >> 2017 >> Jetta SEL >> Repair and Diagnosis (Single Page) >> Engine Performance >> Fuel Delivery >> Engine System (Diagnostics & General Information - CPRA - 2 Of 2) >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Modes 01 - 09 >> Diagnostic Mode 08 - Request Control Of On- Board System, Test Or Component >> Test Requirements