Idle Switch

With the throttle closed, the idle switch supplies the ECU inputs for the following.

• Idle Air Stabilizer
• Deceleration Fuel Shutoff
• Electronic Control Unit (ECU)

The idle switch supplies ECU with information to cut fuel during deceleration, and activate idle stabilizer to control idle speed.

Fig 1: Identifying CIS-E Motronic Components (Except Corrado 2.8L)

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Fig 2: Identifying CIS-E Motronic Components (Corrado 2.8L)

Courtesy of VOLKSWAGEN UNITED STATES, INC.