恰當?shù)脑\斷和處理過程

1、RBCD/QMM | Jan 15 2008 | Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties.Diesel Systems無錫博世售后現(xiàn)場技術(shù)支持小組（RBCD-FCT）1無錫博世售后現(xiàn)場技術(shù)支持小組（RBCD-FCT）RBCD/QMM | Jan 15 2008 | Robert Bosch GmbH

2、reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties.Diesel Systems目前售后診斷、維修存在問題:2RBCD/QMM | Jan 15 2008 | Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reser

3、ve all rights of disposal such as copying and passing on to third parties.Diesel Systems一般恰當?shù)脑\斷和處理過程：1.根據(jù)故障現(xiàn)象、車輛反應，初步判斷是什么方面的問題 機械，電或者零部件，但不能一開始就更換部件！除非確認，如蓄電池沒電等等。2.察看發(fā)動機故障，讀取故障代碼 電控系統(tǒng)與老的機械系統(tǒng)有較大差別，電控方面的大部分故障，包括傳感器 、線束以及執(zhí)行器的故障很多都會記錄在ECU里面，通過診斷設(shè)備可以讀取故障代碼及其解釋。3.根據(jù)故障代碼及其解釋，進行處理 一步步排查，具體問題具體分析，不確認之前，不要更

4、換任何零部件！無錫博世售后現(xiàn)場技術(shù)支持小組（RBCD-FCT）3RBCD/QMM | Jan 15 2008 | Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties.Diesel Systems很多故障碼表示某個局部有問題，而不能精確到某個部件或者傳感器，如P1011-表示軌壓偏差超上限，這表示的是壓力不夠，可能

5、涉及到低壓部分(油箱沒有、管路漏氣、濾清堵塞等)，也有可能是高壓部分(高壓零部件磨損等)引起，具體問題具體分析油路方面的故障碼，請檢查油箱、管路、燃油濾清器、高壓泵、噴油器等電氣方面，請檢查線束、接插件、傳感器本身等等，具體問題具體分析其它，參看錯誤描述，進行針對處理無錫博世售后現(xiàn)場技術(shù)支持小組（RBCD-FCT）4RBCD/QMM | Jan 15 2008 | Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disp

6、osal such as copying and passing on to third parties.Diesel Systems4.如果無法讀取故障代碼，請檢查： A.診斷設(shè)備是否正常？ 包括：數(shù)據(jù)是否更新、設(shè)備硬件等 B.診斷口到ECU的通訊線束是否正常？ C.ECU是否正常工作？包括：ECU供電、ECU本身等5.如果沒有故障碼 根據(jù)經(jīng)驗以及數(shù)據(jù)流進行分析判斷無錫博世售后現(xiàn)場技術(shù)支持小組（RBCD-FCT）5RBCD/QMM | Jan 15 2008 | Robert Bosch GmbH reserves all rights even in the event of indust

7、rial property rights. We reserve all rights of disposal such as copying and passing on to third parties.Diesel Systems電控柴油機系統(tǒng)故障診斷原則只有經(jīng)過該系統(tǒng)專業(yè)知識培訓的技師方能從事新型電控柴油系統(tǒng)的故障診斷應用合適的診斷設(shè)備、專用工具進行電控柴油系統(tǒng)的故障診斷故障診斷前需詳細閱讀發(fā)動機制造廠的操作指南和技術(shù)說明電控柴油機系統(tǒng)故障診斷多采用逆源診斷法，先使用診斷設(shè)備找出故障的可能原因，然后從外圍設(shè)備到控制單元逐步尋找故障所在的部位，最后加以解決無錫博世售后現(xiàn)場技術(shù)支持小組（R

8、BCD-FCT）6RBCD/QMM | Jan 15 2008 | Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties.Diesel Systems典型故障分析：1.發(fā)動機不能起動/起動困難電瓶電壓、啟動電機保險絲，繼電器，線索及接口防盜控制器、ECU問題等軌壓無法建立(如無供油、油路堵塞、油路漏氣、噴油器磨損回

9、油量過大等)同步不好(曲軸、相位傳感器及線索，機械上如飛輪安裝等)預熱不好(冬天常見，包括冷卻液傳感器等)發(fā)動機機械部分無錫博世售后現(xiàn)場技術(shù)支持小組（RBCD-FCT）7RBCD/QMM | Jan 15 2008 | Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties.Diesel Systems典型故障分析：

10、2.發(fā)動機冒黑煙進氣系統(tǒng)問題，如空濾堵塞渦輪增壓器噴油器相關(guān)(噴油不精確)冷卻液溫度傳感器發(fā)動機機械系統(tǒng)（如節(jié)氣門等）無錫博世售后現(xiàn)場技術(shù)支持小組（RBCD-FCT）8RBCD/QMM | Jan 15 2008 | Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties.Diesel Systems典型故障分析：3

11、.發(fā)動機冒白煙冷卻液溫度傳感器預熱系統(tǒng)油里含水過多發(fā)動機機械系統(tǒng)（如節(jié)氣門漏氣等）無錫博世售后現(xiàn)場技術(shù)支持小組（RBCD-FCT）9RBCD/QMM | Jan 15 2008 | Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties.Diesel Systems典型故障分析：4.發(fā)動機冒藍煙機油過多，來自渦輪增壓

12、器潤滑、曲軸通風管、節(jié)氣門潤滑、活塞潤滑等無錫博世售后現(xiàn)場技術(shù)支持小組（RBCD-FCT）10RBCD/QMM | Jan 15 2008 | Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties.Diesel Systems典型故障分析：5.發(fā)動機動力不足空濾或者進氣管路堵塞、管路漏氣(增壓器后)渦輪增壓器問題廢

13、氣再循環(huán)問題油門踏板輸入信號不對冷卻液溫度傳感器、進氣流量傳感器等燃油問題軌壓不夠(高壓泵等)，油路堵塞，油路漏氣噴油器積炭等控制功能方面，過熱保護、降級(如燃油含水位過高)等發(fā)動機機械問題無錫博世售后現(xiàn)場技術(shù)支持小組（RBCD-FCT）11RBCD/QMM | Jan 15 2008 | Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to

14、 third parties.Diesel Systems舉例：1.發(fā)動機不能起動時間：2008年8月 地點：北京福田公司車輛：風景 發(fā)動機：4JB1 里程數(shù)：30KM故障碼：P0251(油量計量閥開路)，P0404(沒有EGR信號) ，P0193(軌壓傳感器電壓超上限)等故障描述：車輛下線后就不能起動，開始福田工程師更換ECU能起動，但后來又不能起動，工程師對線索及傳感器檢查，確認正常。FCT排查：根據(jù)錯誤代碼逐個排除，測量傳感器發(fā)現(xiàn)都正常，檢查線索時，發(fā)現(xiàn)對傳感器供電不正常，逐步確認下去，發(fā)現(xiàn)ECU供電不正常，最后檢查ECU線索，發(fā)現(xiàn)主繼電器有問題，更換主繼電器問題解決。無錫博世售后現(xiàn)場技術(shù)支持小組（RBCD-FCT）12RBCD/QMM | Jan 15 2008 | Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties.Diesel Systems舉例：2.發(fā)動機不能起動、黑煙、抖動時間：2008年4月 地點：馬鞍山車輛：皮卡 發(fā)動機：4JB1 里程數(shù)：15,000Km故障碼：P1011-軌