System Operation

The pedestrian protection system is operational when the vehicle is traveling at speeds between approximately 20 km/h (12.4 mph) and 45 km/h (28 mph). A vehicle speed signal is received by the restraints system control module over the high speed CAN bus.

The system is able to determine if contact is made with a pedestrian or another object, such as a traffic cone, using signals from accelerometers mounted behind the front bumper. When the system determines contact is made with a pedestrian it fires the actuators to lift the rear of the hood approximately 130 mm within 35 ms of the 'fire' signal.

When an impact condition is registered, the restraints system control module outputs an impact signal on the high speed CAN bus. This signal is used by the RJB to initiate the hazard warning lamps. If this occurs, the hazard warning lamp switch is disabled for the remainder of the current ignition cycle.

If the restraints system control module detects a fault with the system, it outputs a message on the high speed CAN bus to the instrument cluster message center. On receipt of this, the message center will display the message 'CHECK PEDESTRIAN SYSTEM'.

The restraints system control module also stores the VIN (vehicle identification number). If a new control module is fitted to the vehicle the Jaguar approved diagnostic tool must be used to program the unit with the vehicles VIN.

When the vehicle is delivered from the factory the pedestrian protection system is in a 'safe' plant mode. Normal operating mode should be activated using the Jaguar approved diagnostic tool during the Pre-Delivery Inspection (PDI) prior to delivery to the customer. For additional information, refer to the PDI manual.

If any damage is caused to the front of the vehicle, be it cosmetic or structural, repairs must be carried out in line with the processes contained in the service information. Failure to carry out the correct repair process could compromise operation of the pedestrian protection system. Refer to TOPIx for the latest information.

The vehicle must be left for 1 minute after disconnecting the battery before any work can be carried out on the pedestrian protection system.