Презентация Diagnosis and troubleshooting of automotive electrical онлайн
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- Тип файла:ppt / pptx (powerpoint)
- Всего слайдов:65 слайдов
- Для класса:1,2,3,4,5,6,7,8,9,10,11
- Размер файла:1.51 MB
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Слайды и текст к этой презентации:
№2 слайд
![OBJECTIVES After studying](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img1.jpg)
Содержание слайда: OBJECTIVES
After studying Chapter 38, the reader will be able to:
Prepare for ASE computerized engine controls diagnosis (A8) certification test content area “E.”
List the steps of the diagnostic process.
Describe the simple preliminary tests that should be performed at the start of the diagnostic process.
List six items to check as part of a thorough visual inspection.
№3 слайд
![OBJECTIVES Explain the](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img2.jpg)
Содержание слайда: OBJECTIVES
Explain the troubleshooting procedures to follow if a diagnostic trouble code has been set.
Explain the troubleshooting procedures to follow if no diagnostic trouble code has been set.
Discuss the type of scan tools that are used to assess vehicle components.
Describe the methods that can be used to reprogram (reflash) a vehicle computer.
№4 слайд
![THE EIGHT-STEP DIAGNOSTIC](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img3.jpg)
Содержание слайда: THE EIGHT-STEP DIAGNOSTIC PROCEDURE
It is important that all automotive service technicians know how to diagnose and troubleshoot engine computer systems.
The diagnostic process is a strategy that eliminates known-good components or systems in order to find the root cause of automotive engine performance problems.
All vehicle manufacturers recommend a diagnostic procedure, and the plan suggested in this chapter combines most of the features of these plans plus additional steps developed over years of real-world problem solving.
№5 слайд
![THE EIGHT-STEP DIAGNOSTIC](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img4.jpg)
Содержание слайда: THE EIGHT-STEP DIAGNOSTIC PROCEDURE
Verify the Problem (Concern)
Perform a Thorough Visual Inspection and Basic Tests
Check for obvious problems (basics, basics, basics).
Check everything that does and does not work.
Look for evidence of previous repairs.
Check oil level and condition.
Check coolant level and condition.
Use the paper test
Ensure adequate fuel level.
Check the battery voltage.
Check the spark using a spark tester.
Check the fuel pump pressure
№6 слайд
![THE EIGHT-STEP DIAGNOSTIC](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img5.jpg)
Содержание слайда: THE EIGHT-STEP DIAGNOSTIC PROCEDURE
Retrieve the Diagnostic Trouble Codes (DTCs)
Check for Technical Service Bulletins (TSBs)
Look Carefully at Scan Tool Data
Narrow the Problem to a System or Cylinder
Repair the Problem and Determine the Root Cause
Verify the Repair and Clear Any Stored DTCs
№17 слайд
![RETRIEVAL OF DIAGNOSTIC](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img16.jpg)
Содержание слайда: RETRIEVAL OF DIAGNOSTIC INFORMATION
To retrieve diagnostic information from the PCM, use the following steps:
Locate and gain access to the data link connector (DLC).
Connect the scan tool to the DLC and establish communication.
Follow the on-screen instructions of the scan tool to correctly identify the vehicle.
Observe the scan data, as well as any diagnostic trouble codes.
Follow vehicle manufacturer’s instructions if any DTCs are stored. If no DTCs are stored, compare all sensor values with a factory acceptable range chart to see if any sensor values are out-of-range.
№18 слайд
![TROUBLESHOOTING USING](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img17.jpg)
Содержание слайда: TROUBLESHOOTING USING DIAGNOSTIC TROUBLE CODES
Pinning down causes of the actual problem can be accomplished by trying to set the opposite code.
For example, if a code indicates an open throttle position (TP) sensor (high resistance), clear the code and create a shorted (low-resistance) condition.
This can be accomplished by using a jumper wire and connecting the signal terminal to the 5-volt reference terminal.
№20 слайд
![FLASH CODE RETRIEVAL ON OBD-I](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img19.jpg)
Содержание слайда: FLASH CODE RETRIEVAL ON OBD-I GENERAL MOTORS VEHICLES
The GM system uses a “check engine” or “check engine soon” MIL to notify the driver of possible system failure. Under the dash (on most GM vehicles) is a data link connector (DLC) previously called an assembly line communications link (ALCL) or assembly line diagnostic link (ALDL).
Most General Motors diagnostic trouble codes can be retrieved by using a metal tool and contacting terminals A and B of the 12-pin DLC
№22 слайд
![RETRIEVING FORD DIAGNOSTIC](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img21.jpg)
Содержание слайда: RETRIEVING FORD DIAGNOSTIC CODES
The best tool to use during troubleshooting of a Ford vehicle is a self-test automatic readout (STAR) tester, new generation STAR (NGS), WDS (Worldwide Diagnostic System), or another scan tool with Ford capabilities.
If a STAR tester or scan tool is not available, a needle (analog) type of voltmeter can be used for all OBD-I (prior to 1996) systems.
№26 слайд
![FLASH CODE RETRIEVAL ON](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img25.jpg)
Содержание слайда: FLASH CODE RETRIEVAL ON CHRYSLER VEHICLES
To put the computer into the self-diagnostic mode, the ignition switch must be turned on and off twice within a 5-second period (on-off-on-off-on).
The computer will flash a series of fault codes.
Older Chrysler brand products flash the “check engine” lamp on the dash.
№35 слайд
![J REPROGRAMMING Legislation](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img34.jpg)
Содержание слайда: J2534 REPROGRAMMING
Legislation has mandated that vehicle manufacturers meet the SAE J2534 standards for all emissions-related systems on all new vehicles starting with model year 2004.
This standard enables independent service repair operators to program or reprogram emissions-related ECMs from a wide variety of vehicle manufacturers with a single tool.
№38 слайд
![MANUFACTURER S DIAGNOSTIC](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img37.jpg)
Содержание слайда: MANUFACTURER’S DIAGNOSTIC ROUTINES
Each vehicle manufacturer has established their own diagnostic routines and they should be followed. Most include the following steps:
Retrieve diagnostic trouble codes.
Check for all technical service bulletins that could be related to the stored DTC.
If there are multiple DTCs, the diagnostic routine may include checking different components or systems instead of when only one DTC was stored.
Perform system checks.
Perform a road test matching the parameters recorded in the freeze-frame to check that the repair has corrected the malfunction.
Repeat the road test to cause the MIL to be extinguished.
№39 слайд
![COMPLETING SYSTEM REPAIRS](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img38.jpg)
Содержание слайда: COMPLETING SYSTEM REPAIRS
After the repair has been successfully completed, the vehicle should be driven under similar conditions that caused the original concern.
Verify that the problem has been corrected.
To perform this test drive, it is helpful to have a copy of the freezeframe parameters that were present when the DTC was set.
By driving under similar conditions, the PCM may perform a test of the system and automatically extinguish the MIL.
№41 слайд
![ROAD TEST DRIVE TRACE Use the](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img40.jpg)
Содержание слайда: ROAD TEST (DRIVE TRACE)
Use the freeze-frame data and test-drive the vehicle so that the vehicle is driven to match the conditions displayed on the freezeframe.
If the battery has been disconnected, then the vehicle may have to be driven under conditions that allow the PCM to conduct monitor tests
Universal Drive Cycle
№42 слайд
![EUROPEAN BOSCH DIAGNOSIS](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img41.jpg)
Содержание слайда: EUROPEAN BOSCH DIAGNOSIS
Diagnosing a European brand vehicle, such as a Volkswagen, Audi, Mercedes, or BMW, can be a challenge.
One of the challenges is that global (generic) scan tools, while capable of supplying the specified data, do not allow access to many diagnostic trouble codes that might be set and stored.
Using factory-level scan tools, such as VAG-COM, launch X431, or Baum iscan, results in some terms that are not familiar such as:
Address word.
Function
Display group
Using Function 04
№43 слайд
![SUMMARY Funnel diagnostics](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img42.jpg)
Содержание слайда: SUMMARY
Funnel diagnostics—Visual approach to a diagnostic procedure:
Verify the problem (concern)
Perform a thorough visual inspection and basic tests
Retrieve the diagnostic trouble codes (DTCs)
Check for technical service bulletins (TSBs)
Look carefully at scan tool data
Narrow the problem to a system or cylinder
Repair the problem and determine the root cause
Verify the repair and check for any stored DTCs
Care should be taken to not induce high voltage or current around any computer or computer-controlled circuit or sensor.
A thorough visual inspection is important during the diagnosis and troubleshooting of any engine performance problem or electrical malfunction.
If the MIL is on, retrieve the DTC and follow the manufacturer’s recommended procedure to find the root cause of the problem.
OBD-II vehicles use a 16-pin DLC and common DTCs.
№44 слайд
![REVIEW QUESTIONS Explain the](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img43.jpg)
Содержание слайда: REVIEW QUESTIONS
Explain the procedure to follow when diagnosing a vehicle without any stored DTCs using a scan tool.
Discuss what the PCM does during a drive cycle to test emission-related components.
Explain the difference between a type A and type B OBD-II diagnostic trouble code.
List three things that should be checked as part of a thorough visual inspection.
List the eight-step funnel diagnostic procedure.
Explain why a bulletin search should be performed after stored DTCs are retrieved.
List the three methods that can be used to reprogram a PCM.
№45 слайд
![CHAPTER QUIZ Technician A](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img44.jpg)
Содержание слайда: CHAPTER QUIZ
Technician A says that the first step in the diagnostic process is to verify the problem (concern). Technician B says the second step is to perform a thorough visual inspection. Which technician is correct?
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B
№46 слайд
![CHAPTER QUIZ Technician A](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img45.jpg)
Содержание слайда: CHAPTER QUIZ
Technician A says that the first step in the diagnostic process is to verify the problem (concern). Technician B says the second step is to perform a thorough visual inspection. Which technician is correct?
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B
№53 слайд
![CHAPTER QUIZ .Technician A](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img52.jpg)
Содержание слайда: CHAPTER QUIZ
5. Technician A says that if the opposite DTC can be set, the problem is the component itself. Technician B says if the opposite DTC cannot be set, the problem is with the wiring or grounds. Which technician is correct?
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B
№54 слайд
![CHAPTER QUIZ .Technician A](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img53.jpg)
Содержание слайда: CHAPTER QUIZ
5. Technician A says that if the opposite DTC can be set, the problem is the component itself. Technician B says if the opposite DTC cannot be set, the problem is with the wiring or grounds. Which technician is correct?
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B
№59 слайд
![CHAPTER QUIZ .Technician A](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img58.jpg)
Содержание слайда: CHAPTER QUIZ
8. Technician A says that reprogramming a PCM using the J2534 system requires a factory scan tool. Technician B says that reprogramming a PCM using the J2534 system required Internet access. Which technician is correct?
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B
№60 слайд
![CHAPTER QUIZ .Technician A](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img59.jpg)
Содержание слайда: CHAPTER QUIZ
8. Technician A says that reprogramming a PCM using the J2534 system requires a factory scan tool. Technician B says that reprogramming a PCM using the J2534 system required Internet access. Which technician is correct?
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B
№61 слайд
![CHAPTER QUIZ .Technician A](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img60.jpg)
Содержание слайда: CHAPTER QUIZ
9. Technician A says that knowing if there are any stored diagnostic trouble codes (DTCs) may be helpful when checking for related technical service bulletins (TSBs). Technician B says that only a factory scan tool should be used to retrieve DTCs. Which technician is correct?
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B
№62 слайд
![CHAPTER QUIZ .Technician A](/documents_6/b874303175d3bbc84e6bbb0e70a92203/img61.jpg)
Содержание слайда: CHAPTER QUIZ
9. Technician A says that knowing if there are any stored diagnostic trouble codes (DTCs) may be helpful when checking for related technical service bulletins (TSBs). Technician B says that only a factory scan tool should be used to retrieve DTCs. Which technician is correct?
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B
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