汽車(chē)專業(yè)英語(yǔ)(第7章)《汽車(chē)專業(yè)英語(yǔ)》王錦俞主編.ppt

汽車(chē)專業(yè)英語(yǔ),Unit 7 Diagnostic Scan Tool and Oscilloscope 第七單元 故障診斷儀和示波器,7-1 Diagnostic Scan Tool (#1) 故障診斷儀,Kingtec Diagnostic System 金德故障診斷儀，金德故障診斷系統(tǒng),Tech2=Tech2 Scan Tool#1 diagnostic tester TECH2故障診斷儀,Touch Panel Type Tester 觸摸屏式故障診斷儀，觸摸屏式測(cè)試儀,VAS 5051=Vehicle diagnostic, testing and information system 5051 （大眾公司）5051型車(chē)輛診斷、測(cè)試和信息裝置,What Is Hand-held Tester?,The DTCs that are stored in the ECU can be displayed on a handheld tester by establishing communication directly with the ECU. In addition, the hand-held tester can clear the DTCs from the ECUs memory. The hand-held tester provides other functions such as displaying the information data by communicating with the ECU by various sensors, or serving as a voltmeter or an oscilloscope.,7-2 Tech 2 Scan Tool Tech 2 故障診斷儀(#1),soft key 軟鍵 select key 選擇鍵 action key 作用鍵 function key 功能鍵,YES 是，可以 ENTER 進(jìn)入，鍵入 EXIT 退出 NO 不 SHIFT 轉(zhuǎn)換 PWR=power 電源,What Is Diagnosis?,The on-board diagnostic system is the vehicles self-diagnosis function that is provided by the ECU (Electronic Control Unit). Upon receiving the signals from the sensors that detect the conditions of the vehicle, the ECU transmits signals to the actuators optimally for the current conditions. The ECU receives signals from the sensors in the form of voltage. The ECU can determine the conditions of the system by detecting the changes in the voltage of the signals that are output by the sensors. Thus, the ECU constantly monitors the input signals (voltage), compares them to the standard values that are stored in the ECUs memory, and determines any abnormal conditions.,The graph on the left shows the characteristics of a water temperature sensor. Normally, the voltage of the water temperature sensor should vary between 0.1V and 4.8V, if a voltage within this range is input, the ECU determines that the condition is normal. If it is a short circuit (the input voltage is less than 0.1V) or an open circuit (the input voltage is more than 4.8V), the ECU determines that it is abnormal. If the ECU determines the input signal to be abnormal, the ECU illuminates the MIL (Malfunction Indicator Light) to alert the driver and stores a DTC (Diagnostic Trouble Code) in its memory.,7-3 Touch Panel Type Tester Operation 觸摸屏式故障診斷儀操作,一. 設(shè)定菜單,二. 應(yīng)用,三. 診斷菜單,Interpret Scan Tool Data to Determine System Condition,A scan tool is a test computer that communicates with the PCM and other on board computers of a vehicle .The scan tool reads and displays diagnostic information provided by the PCM such as DTCs and system operating data or parameters. Data transmitted to the scan tool from the PCM include both digital and analog values Digital parameters are often called switch parameters or signals and are either on or off high or low yes or no An analog parameter provides a signal value with a specific minimum-to-maximum range These kinds of data include analog voltage reading speed signal, temperature readings and frequency ranges.,Every item of data transmitted from the PCM to a scan tool has specific value of signal range described in the vehicle specifications. You must have access to or knowledge of these specifications and compare them to the scan tool readings to identify a system fault. Scan tool readings that identify an open or a short circuit are among the easiest to recognize If a resistive sensor displays a scan tool reading at or near the 5.0 volt reference voltage on which most such sensors operate the sensor circuit to the PCM is open If the scan tool voltage for such a sensor is at or near 0 volt the circuit is probably grounded.,7-4 DTCs Detection Item 故障碼檢測(cè)項(xiàng)目,Scan tool reading of PCM input and output signals reflect values as processed by the PCM. In some systems a sensor failure will cause the PCM to ignore the signal from the failed sensor and operate on backup values stored in its own memory. In this case，the PCM may transmit the backup values to the scan tool in place of the failed sensor signal. If any particular scan tool data reading does not make sense in relation to particular problem or symptom, you should test the system component directly with a voltmeter, ohmmeter, oscilloscope, frequency counter, or other test equipment. OBD diagnostic standards require a uniform library of diagnostic trouble codes (DTC) to be used by all carmakers. Additionally, all OBDsystems must transmit a basic list of 16 data items to a scan tool. Carmakers are free, however to “enhance” the onboard diagnostic capabilities of their control systems. Many systems provide much more than the minimum OBD diagnostic data requirements.,7-5 Scan Tool Data Table（一）#1 診斷儀數(shù)據(jù)（一）#1,Data Stream and Indication,7-6 Scan Tool Data Table（二） 故障診斷儀數(shù)據(jù)表（二）,Outline of OBD/MOBD,The MOBD (Multiples On-Board Diagnostic) system enables a hand-held tester to directly communicate with the ECU when the tester is connected to the DLC3 on the vehicle, in order to read Daces and data. 1. Characteristics of MOBD: Destinations: Europe and General Countries 5 digits (P#),(B#), and (C#) *Each “#” indicates a number or an alphabet. For some models with diesel EFI, only 2-digit Daces will be displayed even when the tester directly communicated. However is it possible to read DTC in detail through using the sub-code (1) or (2) than MIL blinking pattern. 2. Principal functions of MOBD: Able to read Daces Able to read the ECU data Able to perform active tests,7-7 Other Abbreviations of Scan Tool 故障診斷儀中其它縮略語(yǔ),Accaccessory 附件 accacceleration 加速度，加速 A/C WOT=A/C Clutch Cut Wide-open-throttle 節(jié)氣門(mén)全開(kāi)時(shí)空調(diào)離合器斷開(kāi) ACV=alternating current voltage 交流電壓 A/Fair fuel ratio 空燃比 ASR=anti-slip regulation 牽引力控制，防滑調(diào)節(jié) A/T或ATautomatic transmission 自動(dòng)變速器 AVR=average 平均，平均的 B=battery (positive) voltage 蓄電池電壓 BAbrake assist 制動(dòng)輔助裝置 CKPcrankshaft position 曲軸位置 CMPcamshaft position 凸輪軸位置 VSC=vehicle stability control ”,DCV=direct current voltage 直流電壓 DLC=data link connector 故障診斷插座 ELDelectrical load detect 電氣負(fù)荷檢測(cè) EPS=electronic power steering 電子動(dòng)力轉(zhuǎn)向 ESPelectronic stability program 電子穩(wěn)定程序（德系車(chē)用法，相當(dāng)于“車(chē)輛穩(wěn)定性控制裝置 FREQ=frequency 頻率 FTfuel trim 燃油修正 IDidentification 標(biāo)識(shí)， 標(biāo)識(shí)符 I/Minspection and maintenance 檢查/維護(hù)(常指排放控制方面的檢查/維護(hù)) IPCinstrument panel cluster 組合儀表 ISC=idle speed control 怠速控制，怠速空氣控制 ISSinput shaft speed 輸入軸轉(zhuǎn)速,max=maximum 最大的 min=minimum 最小的 OSSoutput shaft speed 輸出軸轉(zhuǎn)速 PSP=power steering pressure 動(dòng)力轉(zhuǎn)向油壓 PWM=pulse width modulation 脈沖寬度調(diào)制，脈寬調(diào)制 PROMprogrammable read only memory 可編程只讀存儲(chǔ)器 SIRsupplemental inflatable restraint 輔助充氣約束裝置 SRSsupplemental restraint system 輔助約束裝置 SW=switch 開(kāi)關(guān) TFRtransmission fluid pressure 變速器油壓 TWCthree way catalytic converter 三效催化轉(zhuǎn)化器 VSC=vehicle stability control 車(chē)輛穩(wěn)定性控制裝置,OBD /EURO STAGE OBD MONITOR INFORMATION,歐洲階段排放標(biāo)淮OBD監(jiān)測(cè)器信息,7-8 VAG5051 Display VAG5051顯示屏,Vehicle self-diagnosis 車(chē)輛自診斷 Select vehicle system 選擇車(chē)輛系統(tǒng) 01-Engine electronics 01-發(fā)動(dòng)機(jī)電子設(shè)備 41-Diesel pump electronics 41-柴油泵電子設(shè)備 02-Gearbox electronics 02-變速器電子設(shè)備 12-Clutch electronics 12-離合器電子設(shè)備 22-All-wheel drive electronics 22-全輪驅(qū)動(dòng)電子設(shè)備 03-Brake system electronics 03-制動(dòng)系統(tǒng)設(shè)備 14-Suspension electronics 14-懸架系統(tǒng)設(shè)備 24-Traction control system 24-牽引力控制系統(tǒng)設(shè)備 34-Self-leveling suspension 34-自調(diào)平懸架 15-Air bag 15-安全氣囊 25-Immobilizer 25-防盜器，阻斷器 35-Central locking 35-中控門(mén)鎖 45-Interior monitoring 45-艙內(nèi)監(jiān)控裝置 55-Headlight range control 55-前照燈照明范圍控制裝置 Test Instruments 測(cè)試設(shè)備 Go to 轉(zhuǎn)到，到，去 Print 打印 Help 幫助,Vehicle Self-diagnosis 車(chē)輛自診斷 Select diagnostic function 選擇診斷功能 02-Interrogate fault memory 02-查詢故障存儲(chǔ) 03-Final control diagnosis 03-最終控制診斷 04-Basic setting 04-基本設(shè)定 05-Erase fault memory 05-擦除故障存儲(chǔ) 06-End output 06-結(jié)束輸出 07-Code control unit 07-控制模塊編碼 08-Read data block 08-讀取數(shù)