Manual shift test means to disconnect all the harness power plugs of all the shift solenoid valves of the motor controlled automatic transmission. At this time, ECU can not operate the shift according to the shift solenoid valve. The shift of the automatic transmission depends on the position of the shift lever. When the power plug of the whole vehicle harness of the shift solenoid valve is disconnected, the correlation between the gear and the shift lever of the motor controlled automatic transmission of different vehicle lines is inconsistent.

手動式換檔試驗的目地是明確常見故障存有的位置，區(qū)別常見故障是由機械設備、液壓傳動系統(tǒng)還是由電子器件自動控制系統(tǒng)造成的。手動式換檔試驗應在載入故障碼和進行自動變速器基礎查驗后開展。

The purpose of manual shift test is to identify the location of common faults and distinguish whether the common faults are caused by mechanical equipment, hydraulic transmission system or automatic control system of electronic devices. Manual shift test shall be carried out after loading fault code and basic inspection of automatic transmission.

自動變速箱維修

Automatic transmission maintenance

手動式換檔試驗的流程以下:

The process of manual shift test is as follows:

①脫開電子器件操縱自動變速器的全部換檔電磁閥整車線束電源插頭。

① Disconnect all shift solenoid valves of automatic transmission operated by electronic devices and the power plug of vehicle harness.

②啟動柴油發(fā)動機，將變速桿撥至不一樣部位，隨后做路面試驗(還可以將主動輪懸在空中，開展臺架試驗)。

② Start the diesel engine, shift the gear lever to different positions, and then do the road test (the driving wheel can also be suspended in the air to carry out the bench test).

③觀查汽車轉速和時速的對應關系，以分辨自動變速器所在的擋位。不一樣擋位時汽車轉速與時速的關聯(lián)可參照下面的圖。因為液力變矩器的降速功效與傳送的轉距相關，因而表格中時速只有做為參照，具體時速將伴隨著行車中節(jié)氣門油管壓力的不一樣而造成的轉變。

③ Observe the corresponding relationship between vehicle speed and speed per hour to distinguish the gear of automatic transmission. The relationship between vehicle speed and speed per hour in different gears can be seen in the following figure. Because the deceleration effect of the hydraulic torque converter is related to the transmitted torque, the speed per hour in the table can only be used as a reference, and the specific speed per hour will change with the different throttle oil pipe pressure during driving.

④若變速桿坐落于不一樣部位時，自動變速器所在的擋位與圖中中列出同樣，則表明電子器件操縱自動變速器的閥板及換檔實行元器件大部分工作中正常。不然，表明自動變速器的閥板或換檔實行元器件有常見故障。

④ If the shift lever is located in a different position and the gear of the automatic transmission is the same as that listed in the figure, it indicates that the electronic devices operate the valve plate and gear shift of the automatic transmission and most of the components work normally. Otherwise, it indicates that there is a common fault in the valve plate or shift actuator of automatic transmission.

⑤試驗完畢后，接好電磁閥整車線束電源插頭。

⑤ After the test, connect the harness power plug of solenoid valve.

⑥消除電腦上中的故障碼，避免因脫開電磁閥整車線束電源插頭而造成的故障碼儲存在電腦上中，危害自動變速器的常見故障自確診工作中。

⑥ Eliminate the fault code in the computer, avoid the fault code caused by disconnecting the power plug of the whole vehicle harness of the solenoid valve to be stored in the computer, and endanger the self diagnosis of common faults of the automatic transmission.