Abstract: A communication control apparatus and method for controlling communication between a plurality of electronic control units (ECUs) provided in a vehicle and a diagnostic apparatus. Each of the ECUs determines whether it is ready to send a positive response to the diagnostic apparatus within a predetermined response time after receiving a request signal from the diagnostic apparatus. A negative response signal is sent to the diagnostic apparatus by any ECU that is not ready. The negative response signal indicates that the sending ECU is not ready and allows the other ECUs to respond to the diagnostic apparatus. The diagnostic apparatus sends a further request signal directed specifically to an ECU that send a negative response signal.

Abstract: Grounding a PCB to an enclosure sub-assembly is accomplished using a specially designed spring. The spring contains a base portion, an inclined portion and a head portion. Holes are provided in the base portion of the spring to allow for soldering to make a much stronger bond, reducing the chance of separation. A tab is provided on the top portion to reduce snagging nearby objects during installation. Notches are placed between the head portion and flaps connected to he head portion in order to reduce tearing that may occur during manufacture. The spring may then be used with a specially designed enclosure sub-assembly having a drawn feature, the drawn feature engaging the spring and compressing it, allowing grounding to occur. The drawn feature allows for the single spring design to be used in a wide variety of products.