Autonomous Emergency Braking (AEB)

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 Autonomous Emergency Braking (AEB) system can be operated by enabling and disabling the system via the Instrument Cluster (IC) message center menu. The AEB system also becomes operational when the vehicle is in the forward motion at speeds between 3 mph (5 km/h) and 50 mph (80 km/h).

The AEB system interacts with other vehicle systems for key data and functionality, relying on data communication exchanges between the following modules:

Steering Angle Sensor Module (SASM) - Steering angle and rate of change.
Restraints Control Module (RCM) - Lateral acceleration and yaw rate.
Image Processing Module (IPMA) - Collision risk detection.
Anti-lock Brake System (ABS) control module - Braking control and vehicle speed.
Powertrain Control Module (PCM) - Accelerator Pedal Position (APP) and torque control.
Instrument Cluster (IC) - Warning message.
Head Up Display (HUD) - Warning message.

This information is exchanged using the High Speed (HS) Controller Area Network (CAN) powertrain and chassis systems buses and will also use the Body Control Module/Gateway Module (BCM/GWM) assembly and the HS CAN comfort systems bus.

The AEB system uses a four stage sequence of which it operates:

Driver Warning - Before braking is engaged, an audible warning is sounded and a visual warning is displayed in the IC indicating that a collision risk has been identified, but is still avoidable by the driver. The visual warning message is also displayed in the Head Up Display (HUD) if fitted.
Brake Precharge - If the time until collision becomes shorter, but still avoidable, the system applies a small amount of pressure on the brakes to fill the gap between the pads and discs, ensuring the best braking performance if the driver reacts to the warning.
Collision Mitigation - Having identified a collision risk, either static or traveling in the same direction, the function will apply the brakes, mitigating the collision. The operational speed range is between 3 mph and 50 mph (5 and 80 km/h).
Message on Instrument Cluster Post Braking - The IC displays a message to confirm that the Intelligent Emergency Braking (IEB) function has been activated.

The AEB system will not be operational if any the following are present:

Poor camera visibility: Fog, heavy precipitation, soiled windshield, etc.
System fault detected.
Forward collision warning velocity outside range: 318-50 mph (0-80 km/h).
IEB velocity outside range: 3-50 mph (5-80 km/h).
Dynamic Stability Control (DSC) is switched off.
The vehicle is cornering sharply.