Idle Switch - Volkswagen GLI/GTI
- Connect Test Harness (VW 1501 ) between vehicle harness and throttle switch lead. Turn ignition on. Connect voltmeter between terminal No. 1 of test harness and ground. If battery voltage is NOT present, check voltage supply between terminal No. 2 of test harness and ground.
- If battery voltage is NOT present, check and repair wiring. See WIRING DIAGRAMS for wiring color and terminal numbers. Recheck voltage between terminal No. 1 and ground if wiring is repaired. If battery voltage is present, open and slowly close throttle valve.
- Check switch-on point of idle switch, using feeler gauge between throttle lever and idle stop. Switch-on point gap should be .006-.002" (.15-.05 mm) before idle stop. If switch-on point is incorrect, loosen and adjust idle switch position. Idle switch is on underside of throttle valve housing, opposite idle stop.