| Description and Operation Expanded passive anti-theft system (PATS ) functionality The PATS functionality has been expanded to increase anti-theft security. The new system also uses new keys. NOTE:Only keys with a blue insert and the labelling "W1" can be used. After completion of the usual PATS communications between the transponder, transceiver and the powertrain control module (PCM ), the PCM also requests a code from the instrument cluster module via the CAN databus in order to increase the passive anti-theft security. As a result, a further component which is not easily removable is required to enable an engine start. All of the code requests must be completed successfully before the PCM will start the engine. NOTE:When renewing the instrument cluster or the PCM an initialisation with WDS is required. In order to ensure that the engine can be started as quickly as possible, the initial starting procedure is initiated provided the correct key has been detected and no communications errors to the instrument cluster have arisen. However, if the PCM determines within a maximum of three seconds that not all of the PATS conditions have been satisfied, then the engine is switched back off and cannot be restarted (no starter signal, no fuel injection signal, no ignition signal). | 
