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6ES7431-1KF00-0AB0 國四后處理故障維修技巧及總結(jié)
1、所有影響后處理系統(tǒng)工作的故障,都會報出閃碼,區(qū)別就是:有些故障很明確(比如,尿素泵加熱電阻絲開路),有些故障范圍較廣(比如,尿素泵建壓錯誤,可能包括尿素管路、尿素泵等故障)。在深入了解后處理結(jié)構(gòu)的基礎(chǔ)上,通過讀取故障碼,都可以找到排查故障的方向; 2、有些故障并不立刻報出,需經(jīng)過一定的駕駛循環(huán)或時間才開始報故障。比如,整車廠生產(chǎn)安裝過程中,避免不了插、拔、安裝尿素噴嘴,為防止整車出廠前留下故障碼,車輛使用早期是不報尿素噴嘴相關(guān)故障的; 3、有些故障修復(fù)后,雖然閃碼燈、OBD 燈會立刻熄滅,但需要經(jīng)歷一定駕駛循環(huán)或時間,才可以清除歷史故障代碼(國家環(huán)保部要求); 4、有些故障,只有在后處理系統(tǒng)工作過程中才能夠檢測出來,一旦熄火后就成為歷史故障,下次后處理工作時又會報出。比如尿素管路堵塞的故障,剛啟動車輛時,由于后處理系統(tǒng)沒有工作,所以不做管路檢測;當(dāng)開始建立尿素壓力時,就開始檢查管路是否堵塞,才會報出故障,一旦熄火后此故障消失。 5、國四后處理系統(tǒng)的故障都屬于部件故障,只要對后處理的工作原理及各個結(jié)構(gòu)了解透徹,就很容易解決。 6ES7431-1KF00-0AB0
140CPU43412A 你值得擁有!!! 6ES7431-1KF00-0AB0
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