PROBLEM TO BE SOLVED: To decrease man-hour and cost for developing updating software of an ECU to be updated.SOLUTION: G/WECU2 has an updating service function 251a, MCU updating functions 253a and 253b, an updating function transferring function 251e, and an update request transferring function 251f. When receiving an update request from an updating tool, the updating service function 251a is transmitted to an ECU3 to be updated by using the update request transferring function 251f, and the updating functions 253a and 253b are transmitted to the ECU3 to be updated by using the updating function transferring function 251e. The ECU3 to be updated writes updating data received from the updating tool via the G/WECU2 by using the updating functions 253a and 253b, so as to update the program.SELECTED DRAWING: Figure 5
【課題】書き換え対象ECUの書き換えソフトの開発に要する工数及び費用を低減する。【解決手段】G/WECU2は、書き換えサービス機能251aと、MCU書き換え機能253a,253bと、書き換え機能転送機能251eと、書き換え要求転送機能251fとを保持し、書き換えツールから書き換え要求を受信すると、書き換えサービス機能251aを、書き換え要求転送機能251eを用いて書き換え対象ECU3に送信し、書き換え機能253a,253bを、書き換え機能転送機能251fを用いて書き換え対象ECU3に送信する。書き換え対象ECU3は、G/WECUから受信した書き換え機能253a,253bを用い、書き換えツールからG/WECU2を経由して受信した書き換えデータを書き込んでプログラムを書き換える。【選択図】図5
VEHICLE DATA COMMUNICATING SYSTEM
車両用データ通信システム
2017-08-24
Patent
Electronic Resource
Japanese
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