| 主权项 |
1. A system for controlling electrical devices in a vehicle engine compartment, the vehicle comprising a passenger compartment and a firewall separating the engine compartment and passenger compartment, the system comprising:
a plurality of relays located in the engine compartment, each relay being coupled to at least one load and controlling power provided to said at least one load responsive to signals, which each relay receives from a relay controller, each load being coupled to a diagnostic sense line, which carries signals indicating whether a relay coupled to a load is operational; a relay controller located in the engine compartment, the relay controller being coupled to and controlling operation of said relays, the relay controller having a plurality of outputs and a serial port, each output being coupled to a corresponding relay and configured to actuate the relay responsive to a corresponding input signal received by the relay controller at its serial port, the relay controller also having a plurality of inputs, the inputs being coupled to said diagnostic sense lines, the relay controller being configured to receive signals on the diagnostic sense line and format signals received from the diagnostic sense lines into serial signals that are output from the serial port; a body control module located in the passenger compartment, the body control module having a serial port, configured to send and receive signals between the serial port of the relay controller; a serial data link passing through the firewall and coupling the body control module to the relay controller; wherein the serial data link is configured to receive serial data from the body control module and provide serial data from the body control module to the relay control module; and wherein the serial data link is additionally configured to receive serial data from the relay control module and provide the serial data from the relay control module to the body control module. |
