汽车专业英语（第7章）.ppt

汽车专业英语Unit 7 Diagnostic Scan Tool and Oscilloscope第七单元 故障诊断仪和示波器7-1 Diagnostic Scan Tool(#1)故障诊断仪 v Kingtec Diagnostic System v 金德故障诊断仪，金德故障诊断系统 v Tech2=Tech2 Scan Tool#1 diagnostic tester TECH2 故障诊断仪 v Touch Panel Type Tester v 触摸屏式故障诊断仪，触摸屏式测试仪 v VAS 5051=Vehicle diagnostic,testing and information system 5051 v（大众公司）5051 型车辆诊断、测试和信息装置 What Is Hand-held Tester?v The DTCs that are stored in the ECU can be displayed on a handheld tester by establishing communication directly with the ECU.v In addition,the hand-held tester can clear the DTCs from the ECUs memory.v 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 故障诊断仪(#1)v soft key 软键v select key 选择键v action key 作用键v function key 功能键 v YES 是，可以v ENTER 进入，键入v EXIT 退出v NO 不v SHIFT 转换v PWR=power 电源What Is Diagnosis?v The on-board diagnostic system is the vehicles self-diagnosis function that is provided by the ECU(Electronic Control Unit).v 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.v The ECU receives signals from the sensors in the form of voltage.v 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.v 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.v The graph on the left shows the characteristics of a water temperature sensor.v 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.v 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触摸屏式故障诊断仪操作 v 一.设定菜单SETUP MENU（#1）1、CLOCK/CALENDAR2、PRINTER BAUD3、PRINTER SELECT4、UNIT CONVERSION5、BRAND SELECT6、DATA BASE SELECT7、BACKLIGHT SET8、ENH OBD HELP（#2）9、SELF TEST设定菜单1、时钟/日历2、打印机波特率3、打印机选择4、单位转换5、波特选择6、数据库选择7、后灯设定8、增强型OBD 帮助9、自我测试v 二.应用APPLICATION1、DIAGNOSIS2、CUSTOMIZE3、ECU PROGRAM应用1、诊断2、自定3、ECU 重编程v 三.诊断菜单DIAGNOSTIC MENU1、DATA ENGINE LIST2、DTC INFO3、ACTIVE TEST4、SNAPSHOT5、SYSTEM CHECK6、RESET MEMORY7、CHECK MODE诊断菜单（发动机）1、发动机数据菜单2、故障码信息3、主动测试4、快照(#1)5、系统检查6、重设存储器7、检查模式Interpret Scan Tool Data to Determine System Conditionv 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.v 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.v 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.v 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故障码检测项目v 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.v OBD diagnostic standards require a uniform library of diagnostic trouble codes(DTC)to be used by all carmakers.Additionally,all OBD systems 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诊断仪数据（一）#1Data Stream and Indication7-6 Scan Tool Data Table（二）故障诊断仪数据表（二）Outline of OBD/MOBDv 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.v 1.Characteristics of MOBD:v Destinations:Europe and General Countriesv 5 digits(P#),(B#),and(C#)*Each“#”indicates a number or an alphabet.v For some models with diesel EFI,only 2-digit Daces will be displayed even when the tester directly communicated.v However is it possible to read DTC in detail through using the sub-code(1)or(2)than MIL blinking pattern.v 2.Principal functions of MOBD:v Able to read Dacesv Able to read the ECU datav Able to perform active tests7-7 Other Abbreviations of Scan Tool故障诊断仪中其它缩略语v Acc accessory 附件v acc acceleration 加速度，加速v A/C WOT=A/C Clutch Cut Wide-open-throttle 节气门全开时空调离合器断开v ACV=alternating current voltage 交流电压v A/F air fuel ratio 空燃比v ASR=anti-slip regulation 牵引力控制，防滑调节v A/T 或AT automatic transmission 自动变速器v AVR=average 平均，平均的v B=battery(positive)voltage 蓄电池电压v BA brake assist 制动辅助装置v CKP crankshaft position 曲轴位置v CMP camshaft position 凸轮轴位置v VSC=vehicle stability control”v DCV=direct current voltage 直流电压v DLC=data link connector 故障诊断插座v ELD electrical load detect 电气负荷检测v EPS=electronic power steering 电子动力转向v ESP electronic stability program 电子稳定程序（德系车用法，相当于“车辆稳定性控制装置v FREQ=frequency 频率v FT fuel trim 燃油修正v IDidentification 标识，标识符v I/M inspection and maintenance 检查/维护(常指排放控制方面的检查/维护)v IPC instrument panel cluster 组合仪表v ISC=idle speed control 怠速控制，怠速空气控制v ISS input shaft speed 输入轴转速v max=maximum 最大的v min=minimum 最小的v OSS output shaft speed 输出轴转速v PSP=power steering pressure 动力转向油压v PWM=pulse width modulation 脉冲宽度调制，脉宽调制v PROMprogrammable read only memory 可编程只读存储器v SIR supplemental inflatable restraint 辅助充气约束装置v SRS supplemental restraint system 辅助约束装置v SW=switch 开关v TFR transmission fluid pressure 变速器油压v TWC three way catalytic converter 三效催化转化器v VSC=vehicle stability control 车辆稳定性控制装置OBD/EURO STAGE OBD MONITOR INFORMATION 欧洲阶段排放标淮OBD 监测器信息 7-8 VAG5051 Display VAG5051 显示屏 v Vehicle self-diagnosis 车辆自诊断v Select vehicle system 选择车辆系统v 01-Engine electronics 01-发动机电子设备v 41-Diesel pump electronics 41-柴油泵电子设备v 02-Gearbox electronics 02-变速器电子设备v 12-Clutch electronics 12-离合器电子设备v 22-All-wheel drive electronics 22-全轮驱动电子设备v 03-Brake system electronics 03-制动系统设备v 14-Suspension electronics 14-悬架系统设备v 24-Traction control system 24-牵引力控制系统设备v 34-Self-leveling suspension 34-自调平悬架v 15-Air bag 15-安全气囊v 25-Immobilizer 25-防盗器，阻断器v 35-Central locking 35-中控门锁v 45-Interior monitoring 45-舱内监控装置v 55-Headlight range control 55-前照灯照明范围控制装置v Test Instruments 测试设备v Go to 转到，到，去v Print 打印v Help 帮助v Vehicle Self-diagnosis 车辆自诊断v Select diagnostic function 选择诊断功能v 02-Interrogate fault memory 02-查询故障存储v 03-Final control diagnosis 03-最终控制诊断v 04-Basic setting 04-基本设定v 05-Erase fault memory 05-擦除故障存储v 06-End output 06-结束输出v 07-Code control unit 07-控制模块编码v 08-Read data block 08-读取数据块v 09-Read individual measured value 09-读取单个测量值v 10-Adaptation 10-匹配v 11-Login procedure 11-进入编程v Update programming 重新编程7-9 DSO Display=Date Storage Oscillograph Display 数字式存储示波器显示屏v Test instruments 测试设备v DSO=Data Storage Oscillograph 数字式存储示波器v Auto mode 自动模式v V/DIV.=volt/division 伏/格v Ms/DIV.=millisecond/division 毫秒/格v Freeze frame 1 保持帧，冻结帧 1v Channel A 通道Av Channel B 通道Bv Trigger mode 触发模式v Measuring mode 测量模式v Millimeter 毫米，mmv Default measurement 系统默认测量v Coupling(电子学)耦合 v Go to 转到，到，去v Print 打印v Help 帮助Information of Multi Function Displayv v 1.Trip Information OUTSIDE TEMPv Consumptionv After Refueling MPG v Cruising Range miles v Cruisev Average Speed MPH v Distance miles v Menu Map DVD v Suspend Guidance Volume Select User v My Places Setupv 2.Diagnosis Check Menu v EMV OK v NAVI OK v AUDIO H/U OK v G/W OK v CAMERA OK v DSP-AMP OK v Next Page Memory CLR Recheck