Control Function 3 (Tests Fuel Injector & Idle Valve Circuits)

This function tests fuel injector and idle valve operation. It consists of a function cycle where the diagnostic system activates the components. You find out if the component is working by listening or putting a hand on it when it is activated.

Fig 1: Bosch & Rex-I Diagnostic Unit

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Counting Red LED Code Flashes

Courtesy of VOLVO CARS OF NORTH AMERICA.