Hood Hinge Actuators

The pedestrian hood actuators deploy only when a valid signal whose energy is capable of triggering deployment of the hood is present. The pedestrian hood actuators only deploys in those events where the activation of the hood is expected. The hood actuator is not expected to deploy in low severity event where the risk of injury is low or in a high severity event like car to car crash. During a frontal pedestrian impact of sufficient force, the PIDS module will allow current to flow through the deployment loops in order to deploy the hood hinge actuators. The pedestrian impact module also performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, shorts to ground and shorts voltage. In order to prevent unwanted deployment of the actuator during service, the hood hinge actuator contains 2 shorting bars that will short both high and low circuit pins when disconnected. The PIDS module only issues a deployment command when a valid safing signal or confirmation has been generated. No inadvertent deployments will occur in any deployment loop due to a single point fault.