1. Shift the selector lever to the N position.
2. Disconnect the negative battery cable.
3. Remove the battery and battery tray. (See BATTERY REMOVAL/INSTALLATION [YF (2.0L Zetec)].) (See BATTERY REMOVAL/INSTALLATION [L3, AJ (3.0L Duratec)].)
4. Disconnect the crankcase vent hose and MAF sensor connector.
5. Remove the air hose and air cleaner cover.
6. Remove the air cleaner component.
7. Remove the thermostat housing. (See THERMOSTAT REMOVAL/INSTALLATION [YF (2.0L Zetec)].) (See THERMOSTAT REMOVAL/INSTALLATION [AJ (3.0L Duratec)].)
8. Disconnect the TR switch connector.
9. Remove the bolts.
10. Remove the TR switch.