| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce excessive costs for addressing noise issues by preventing communication to a plurality of sensor parts bus-connected to an ECU concerned from another ECU from giving adverse effect on a radio AM band. Ž<P>SOLUTION: By making a plurality of time widths Ta, Tb, Tc with different time widths associate with each of sensor parts 15a-1 to 15c-1, an ECU 18-1 performs a control to charge capacitors 26a-26c of the respective sensor parts 15a-1 to 15c-1 according to each of time widths Ta-Tc, and makes a control such that nothing is transmitted during a signal phase time width. Each of the sensor parts 15a-1 to 15c-1 detects each time width Ta from a charging time to its own capacitors 26a-26c, and responds to the ECU 18-1 during the signal phase time width when each detected time width Ta corresponds to its own each pre-stored time width Ta. The ECU 18-1 recognizes the sensor part in receiving the response. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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