當液壓油溫度傳感器連接線路發生斷、短路故障時,控制單元將無法獲得液壓油溫度信息控制自動變速器換擋,使控制系統出現故障。當故障指示燈點亮時,通過人工方法或使用專用儀表(器)可以讀取故障碼。變速器油溫度傳感器的檢測方法與前面所介紹的幾種溫度傳感器相似。
具(ju)體的檢測方法如下。
(1) 直觀(guan)檢查檢查變(bian)速器油(you)溫(wen)度傳感(gan)器連接器有無松動(dong),線路有無破損(sun)或燒焦等,若有,則應予(yu)以修復(fu)。
(2) 檢測變速器(qi)油溫(wen)度傳(chuan)(chuan)感(gan)器(qi)的電(dian)源電(dian)壓拔下變速器(qi)油溫(wen)度傳(chuan)(chuan)感(gan)器(qi)連接器(qi),測量變速器(qi)油溫(wen)度傳(chuan)(chuan)感(gan)器(qi)插頭(線束側)電(dian)源端子與搭鐵之(zhi)間的電(dian)壓,應為5V左右。 如果(guo) 電(dian)壓低或無(wu)電(dian)壓,則檢修變速器(qi)油溫(wen)度傳(chuan)(chuan)感(gan)器(qi)與ECU之(zhi)間的線路,若線路良好,則需 更換ECU。
(3) 檢測變速器(qi)(qi)(qi)油(you)溫(wen)(wen)度(du)傳(chuan)感器(qi)(qi)(qi)的電阻拔下變速器(qi)(qi)(qi)油(you)溫(wen)(wen)度(du)傳(chuan)感器(qi)(qi)(qi)連接器(qi)(qi)(qi)后(hou),可拆(chai)下傳(chuan)感 器(qi)(qi)(qi),放在有水的熱杯(bei)中(zhong),加熱杯(bei)中(zhong)的水,測量各種不(bu)同(tong)溫(wen)(wen)度(du)下的電阻值(zhi), 若(ruo)檢測的電阻值(zhi)與標準值(zhi)相差較(jiao)大(da),則(ze)應更換液壓油(you)溫(wen)(wen)度(du)傳(chuan)感器(qi)(qi)(qi)。
(4) 檢測變(bian)速(su)(su)器(qi)(qi)油(you)(you)溫(wen)(wen)(wen)(wen)(wen)(wen)度傳感(gan)器(qi)(qi)的信(xin)號電(dian)(dian)(dian)壓(ya)需(xu)要(yao)時,還可進(jin)行變(bian)速(su)(su)器(qi)(qi)油(you)(you)溫(wen)(wen)(wen)(wen)(wen)(wen)度傳感(gan)器(qi)(qi)信(xin)號 電(dian)(dian)(dian)壓(ya)的檢測。接(jie)好變(bian)速(su)(su)器(qi)(qi)油(you)(you)溫(wen)(wen)(wen)(wen)(wen)(wen)度傳感(gan)器(qi)(qi)連(lian)接(jie)器(qi)(qi)后,用直流電(dian)(dian)(dian)壓(ya)表測量變(bian)速(su)(su)器(qi)(qi)油(you)(you)溫(wen)(wen)(wen)(wen)(wen)(wen)度傳感(gan)器(qi)(qi)兩(liang) 端子(zi),或ECU的變(bian)速(su)(su)器(qi)(qi)油(you)(you)溫(wen)(wen)(wen)(wen)(wen)(wen)度傳感(gan)器(qi)(qi)信(xin)號輸(shu)入端子(zi)的電(dian)(dian)(dian)壓(ya),檢查在不同溫(wen)(wen)(wen)(wen)(wen)(wen)度下的變(bian)速(su)(su)器(qi)(qi)油(you)(you) 溫(wen)(wen)(wen)(wen)(wen)(wen)度傳感(gan)器(qi)(qi)信(xin)號電(dian)(dian)(dian)壓(ya)是否在規定的范(fan)圍(wei)之內。幫(bang)手汽配平臺提(ti)供各個車型變(bian)速(su)(su)器(qi)(qi)油(you)(you)溫(wen)(wen)(wen)(wen)(wen)(wen)度傳感(gan)器(qi)(qi)原(yuan)車配件(jian)的訂購(gou)服務
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