Passive Start

WARNING: This page is about a different car, the 2020 Jaguar XE and 2019 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.

The passive start system relies on the detection of a uniquely coded smart key via LF (Low Frequency) antennas strategically situated within the vehicle. The antennas ensure the smart key is always within the active transmission zone of the antennas wherever the smart key is placed inside the vehicle. For this reason the orientation and positioning of the antennas is critical to the correct functioning of the system. The smart key also operates the passive entry system.

For additional information, Refer to: HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS

The system provides a secure interface between the BCM/GWM (Body Control Module/Gateway Module) and the ECM (Engine Control Module) to prevent unauthorized starting of the engine. This is achieved by immobilization of the engine crank system and the fuel system, using encoded data exchange between the smart key and multiple control modules.

Engine starting is initiated when the encoded data exchange between the smart key and the control modules is verified. The engine management system will then allow engine crank and fueling when an authorization data message is received from the BCM/GWM.

The engine can be started by pressing the start/stop switch, and depending on the type of transmission;

Automatic: when the drive selector is in the 'Park' position and the brake pedal is pressed.
Manual: when the gear selector is in 'Neutral' and the clutch pedal is pressed.