October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Closed Throttle Position Switch

Closed TP switch is part of the TP sensor. Switch is closed at idle and open during off-idle throttle position. ECM only uses this signal to open or close EVAP canister purge control valve when throttle position sensor is malfunctioning. Switch also has a full throttle position used only for A/T control.