Idle Tracking Switch

The Idle Tracking Switch (ITS), located on carburetor, is a mechanically operated electric switch held open by throttle linkage when throttle is closed. It is used on the Extended Idle Air By-Pass System.

When ITS is opened, EEC module is signaled to de-activate the normally closed solenoid. When this happens, vacuum is removed from the normally closed by-pass valve, and thermactor air is released into atmosphere.