Remove the wiring connector from the power stage and connect an LED test light between terminals 2 and 3 of the connector. See Fig. 3-17 above. With the Hall sender wiring connector connected and fuel injector connector still disconnected, actuate the starter. The test light should flicker. If it doesn't then either the wiring between terminal 2 of the power stage connector and terminal 11 of the control unit connector is faulty, or the control unit is faulty.