The engine immobiliser is armed automatically a short time after you have switched the ignition off.
The indicator in the instrument cluster will flash to confirm that the system is operating.
Coded keys
Disarming the engine immobiliserFord Focus Accessory Drive Belt Idler Pulley
Removal and Installation
With the vehicle in NEUTRAL, position it on a hoist. For additional information,
refer to Section 100-02.
Remove the 2 bolts and accessory drive belt splash shield.
To install, tighten to 9 Nm (80 lb-in).
Using the hex feature, rotate ...