90 Quattro 20V (Canada) L5-2309cc 2.3L DOHC (7A) (1989)
Throttle Full Close Switch: Description and Operation
The idle switch and throttle valve potentiometer are used to indicate the position of the throttle valve to the ECU. The ECU uses the signals from these
devices, compared with signals from other sensors, to calculate engine load and ignition timing, and to determine when to engage certain functions, such
as acceleration enrichment, full throttle enrichment, deceleration fuel cut-off, and idle speed control.
Idle Switch And Throttle Valve Potentiometer (Before March 1990)
Idle Switch And Throttle Valve Potentiometer (After March 1990)