Land Rover Discovery: Autonomous Emergency Braking (AEB)
The Autonomous Emergency Braking (AEB) system can be operated by
enabling and disabling the system via the Insrument Cluster (IC) menu. The
AEB system also becomes operational when the vehicle is in the forward
motion at speeds between 5 kph (3 mph) and 80 kph (50 mph).
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 Control Module (IPCM) - Collision risk detection.
- Anti-lock Brake System (ABS) control module - Braking control and
vehicle
speed.
- Engine Control Module (ECM) - Accelerator Pedal Position (APP) and
torque control.
- Head Up Display (HUD) - Warning message.
- Instrument Cluster (IC) - Warning message.
This information is exchanged using the High Speed (HS) Controller Area
Network (CAN) powertrain and chassis bus and will also use the Gateway
Module (GWM) and Medium Speed (MS) CAN comfort 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 instrument cluster
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
travelling in the same direction, the function will apply the brakes,
mitigating the collision. The operational speed range is between 5 and
80 km/h (3mph and 50mph).
- Message on Instrument Cluster Post Braking - The instrument cluster
displays a message to confirm that the Intelligent Emergency Braking
(IEB) function has been activated.
The AEB system will not be operationable if any the followlng are present:
- Fog, heavy precipitation, soiled windscreen, etc.
- System fault detected.
- Forward collision warning velocity outside range: 30-80 km/h (18-50
mph).
- IEB velocity outside range: 5-80 km/h (3-50 mph).
- Dynamic Stability Control (DSC) is switched off.
- The vehicle is cornering sharply
CONTROL DIAGRAM
BLINDSPOT MONITORING - CONTROL DIAGRAM
A = HARDWIRED; U = PRIVATE CONTROLLER AREA NETWORK (CAN)
BUS; AM = HIGH SPEED (HS) CAN CHASSIS BUS; AP = MEDIUM SPEED
(MS) CAN COMFORT BUS.
- Left Side Blindspot Monitoring Control Module (BMCM)
- Right Side Blindspot Monitoring Control Module (BMCM)
- Instrument Cluster (IC)
- Anti-lock Braking System (ABS) Control Module
- Gateway Module (GWM)
- Right Side Door Mirror Warning Alert Icon
- Right Side Door Mirror System Status Warning Indicator
- Ground on Right Side BMCM
- Ground on Left Side BMCM
- Power Supply
- Left Side Door Mirror System Status Warning Indicator
- Left Side Door Mirror Warning Alert Icon
IMAGE PROCESSOR CONTROL MODULE (IPCM) - CONTROL DIAGRAM
A = HARDWIRED; AM = HIGH SPEED (HS) CONTROLLER AREA
NETWORK (CAN) CHASSIS BUS; AP = MEDIUM SPEED (MS) CAN
COMFORT BUS.
- Image Processor Control Module (IPCM)
- Anti-lock Braking System (ABS) Control Module
- Gateway Module (GWM)
- Instrument Cluster (IC)
- Head Up Display Control Module (HUDCM)
- Ground
- Power Supply
READ NEXT:
PRINCIPLES OF OPERATION
For a detailed description of the Blindspot Monitoring system, refer to the
relevant Description and Operation section in the workshop manual. REFER
to: Warning Devices (413-09
PRINCIPLES OF OPERATION
For a detailed description of the Autolamps, refer to the relevant
Description and Operation section in the workshop manual. REFER to:
Exterior Lighting (417-01 Exterior Lighti
SEE MORE:
The Instrument panel can be used to
display the vehicle's tyre pressures. The
tyre pressure figures can be accessed via
the Vehicle Info menu.
For more information
Note: The tyre pressure units can be
configured to display as either bar, psi, or
kPa via the Vehicle Info and the Tyre
Information men
REMOVAL
CAUTION:
Make sure to protect the paintwork.
INSTALLATION
Body closures fuel filler door assembly (G1393672)
removal and installation
REMOVAL
WARNING:
Avoid flames, sparks or lighted substances.
CAUTIONS:
Extreme cleanliness must be exercised when handling these
components.
Before d