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List of contents of this article:

• 1, What are the troubleshooting methods of the ignition system
• 2、Common faults and diagnosis methods of Audi A8 engine control system
• 3、How to turn on the diagnostic mode of Win7 to detect system failure
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What are the troubleshooting methods of the ignition system

1. Check the spark plug:There are many reasons why the spark plug has no fire, mainly the high and low voltage loop of the ignition coil is broken, and the circuit breaker cannot be closed or disconnected; the inspection method is to check whether the "+" junction pole of the ignition coil is charged with a multimeter or test lamp.

2. Next, we will briefly introduce the inspection methods of these two faults. Spark plug inspection: There are many reasons why the spark plug is on fire, mainly because the high and low voltage circuit of the ignition coil is disconnected, and the circuit breaker cannot be turned off or broken.

3. Ask the user: the time, phenomenon, situation at that time of the failure, the cause of the failure, and whether it has been overhauled, dismantled, etc. Preliminary determination of the scope and part of the fault. Call out the fault code and find out the content of the fault.

4. Central high-voltage line jumping method. This judgment method is suitable forThe specific method of the ignition system of the distributor is as follows: pull out the central high-voltage wire from the distributor cover and start the engine after making it 5 to 9mm away from the cylinder block to observe the jump at the end of the line.



Common Faults and Diagnostic Methods of Audi A8 Engine Control System

1. Aging of the generator belt: the surface is carbonized or the tension is too loose, causing the transmission belt to slip and make a strange sound, so that the generator turns and the fault light turns on. Generator bearing damage: In case of idling, the rotor and stator of the generator will also contact friction, resulting in overheating.

2. Improper daily maintenance: If the foot valve of the Audi a8 engine is not maintained for a long time or improperly maintained, such as not replacing oil, filter and other spare parts in time, or using unqualified parts, etc., it may lead to the failure of the foot valve.

3. The failure of the Audi a8 startup system is caused by the failure of the computer board. Causes of start-stop failure: Most automatic start-stop failures are based on the control unit detecting that the vehicle cannot start normally after turning off. There are many reasons, such as insufficient battery power (high battery requirements for automatic start and stop vehicles), throttle valve failure, etc.

4. Is the Audi a8 engine fault light on? Questioner: Huang Lei's best answer 1. Generally speaking, most of the fault lights of vehicles are caused by the fuel emission system. Start and stop the vehicle when the fault light is on. Start and stop the vehicle three times before starting the vehicle. Observe whether the fault light is still on.

How to turn on the diagnostic mode in Win7 to detect system failure problems

Click the network connection icon, click "Troubleshooting" to connect to start the "Windows Network Diagnostics" Carry out comprehensive testing. There is no need for manual participation in the testing process. After the test is completed, you will be told the cause of the error and the repair measures.

Diagnose by replacing hardware. Not every hardware problem is easy to diagnose.If you have a bad motherboard or power supply, their problem may only be detected by matching with other components. It is difficult to directly distinguish which parts are, unless you completely replace them.

Start → Run → Enter: services.msc Click OK (or press Enter) to open the service.

In the win7 system, you can refer to the following steps: click "Start" in the lower left corner of the desktop to enter "Control Panel". Enter the "Network and Sharing Center" in the "Control Panel". Enter "Change Adapter Settings" in "Network and Sharing Center".

The test mode allows the Windows system to be allowed in the test state, in which unofficial or unsigned drives can be run.Dynamic program, but many win7 system users do not know how to turn on the test mode. In fact, the method is very simple. Now I will share with you the method of turning on the test mode of win7 for your reference.

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