Fault representation: A 2009 models FAW – Volkswagen Magotan sedan 1.8TSI, say users, speeding up the road in the car bad, EPC warning lamp lights up on the exterior. Failure analysis: The use of fault diagnosis instrument VAS 5051 testing, the engine control unit stores the fault code 08852 (fuel pressure regulating valve N276 open circuit), the fault code is a permanent failure, can not be eradicated. Fuel pressure reading data stream 01-08-140 Group 3 area, appeared at idle is 700kPa, and standardized value should be around 4MPa, the results illustrate the detection system can not establish a high-pressure fuel. Volkswagen PQ46 channel selection Magotan sedan equipped with electronic fuel injection engine, fuel is installed on the high pressure fuel pump through the pressure conditioner N276 to recuperate. In the injection process, based on the engine control unit calculates the starting point of supply to the fuel pressure control valve N276 to send commands to make it pull, at the moment the needle needle stretched spring force to overcome the forward movement, the inlet valve in the stretched spring is closed under the force. Followed by the upward movement of the piston pump, the hydraulic pump chamber to establish when the pump chamber is higher than the hydraulic oil in the fuel rail, forcing the valve open, the fuel will be pumped into the fuel rail. Constitute a stable high-pressure fuel pressure in the fuel rail pressure sensor and to identify the signal to the engine control unit, after reading the data stream 01-08-140 Group 3 zones show we can analyze the pressure hypertension is not a normal build. Based on the above analysis of the process of establishing high-pressure fuel, resulting in high-pressure fuel supply system can not establish a cause includes: camshaft drive equipment damage, high pressure booster pump failure, electronically controlled high pressure booster pump and engine control unit fault line fault. But contact pressure regulating valve fault code hints N276 circuit, it is necessary to fulfill the primary VAS5051 components through self-diagnosis function on the N276 line fuel pressure regulating valve quiz, find fulfillment in contact when measured from diagnosis N276 shell without any repercussions, but also not heard by the engine control unit according to a certain frequency manipulation pull the “click” sound, from the moment of diagnosis interface VAS5051 show closed loop system activation and fulfillment. So start the engine control unit to determine the presence of manipulation can not fault, the fault should be locked in the N276 fulfillment lines. N276 based conditioner control circuit, conditioner N276 total two terminals. Job control T2gz / 2 terminal to the terminal of the engine control unit T60ya/19, to withstand manipulation unit; T2gz / 1 SB17 fuse terminals through the high pressure pump control relay adapter J49 engine 87 feet from the power supply for the main relay signal. DTC then contact tips can analyze the reasons included: N276 internal circuit breaker; N276’s T2gz / 2 terminal to the engine control unit T60ya/19 circuit breaker between the terminals; N276’s T2gz / 1 terminal to the engine high-pressure pump control relays J49 87-pin circuit breaker between the terminals; J49 relay their own circuit breaker; J49 peripheral power supply circuit breaker.Buy cheap and quality vas 5054a on obd2works Unplug the wiring harness connector N276 to T2gz / 1 for the measurement point detection when burning conditions for the normal engine control waveform negative trigger waveform, which is between the N276 wireless clarify the T2gz / 2 terminal to the engine control unit T60ya/19 terminal road circuit representation. To N276 of T2gz / 1 terminal point of measurement, testing without burning conditions in the supply voltage, which can be inferred N276 power supply circuit presents a circuit failure. Measuring the high-pressure pump control relay J49 87 feet of the terminal to N276 T2gz / 2 foot line is normal, it is possible to conclude that the fault is internal or the external power relay J49 reason. In the middle of the detection relay J49, 30 measure the normal supply voltage terminal 85 by the pin from the main relay control SB23, measured normal to the power supply 15. Further manipulation of the coil resistance measurement J49 relay (85 feet and 86 feet) of 82Ω, cf norms resistance is normal, the normal start testing components, but the lack of electricity power lines. In order to pursue this issue, open relay housings, gear survey in the incineration of two relay contacts to fulfill client does not pull clarify the relay coil control when operating inside virtual connection can not supply the required performance of the loop pull closing force. Replace J49 relays, fault code 08852 can be eradicated. At the moment then use VAS5051 quiz function, into the engine system components to perform self-diagnosis N276, N276 can hear frequencies in accordance definitely pull of “clicks” to clarify the engine control unit to control the rehabilitation of the normal high-pressure booster pump, now reads fuel pressure at idle 140 jobs for the group appeared 4MPa, thorough treatment failure so far. Repair Summary: Needs to clarify that, with respect to Magotan sedan, the fuel can not establish a high-pressure high-pressure booster pump failures are basically caused by internal mechanical failure, which is usually the pump piston is catching only point I can not be quite camshaft cylinder through Useful trip lever drive, then not required to establish the appropriate hydraulic injection. Engine control unit monitors the operation of hydraulic scale values of tolerance, then summed for high pressure booster pump without electronic control circuit fault code identifying the logical analysis, and therefore will show fault code 08851 (fuel pressure regulating valve N276 mechanical failure) fault code storage . And in this case due to the associated control circuit breaker, resulting in a fault code stored in 08852, we can see the same appearance, but the causes of failure, but worlds apart, which prompted our failure in the maintenance of electrical control, we must abide by all the confirmed detection processes analysis, targeted to deal with failure to prevent the empirical errors.our shop obd2works.com supply VAS 5054A
VAS 5054A is a very common-used excellent vehicle diagnostic scanner, and the highlights of this one is that it has the OKI Chip and it can support UDS protocol, also it has added new car models Bentley and Lamborghini. Now let’s see what does the VAS 5054A support.
First please remember the Requirements of VAS 5054A V2.0 Computer Windows System :
Windows System Language: American English;
System C:// have to be NTFS format;
C:// need to have at least 40GB space for installing VAS5054A.
This VAS 5054A supports Bluetooth + USB versions:
1.If you wanna access via Bluetooth: After you set up a connection to the VAS 5054A,the Bluetooth software will provide a virtual serial COM port (Bluetooth Serial Port Profile). The Diagnostic Base System uses this COM port to communicate with the VAS 5054A. You need to specify this port when you install the diagnostic application.
2.You can also connect the VAS 5054A to the application PC by using the supplied USB cable.If you wanna access via USB: Windows detects the VAS 5054A through Plug and Play, and automatically installs the drivers copied when you installed the diagnostic application. Setup of the VAS 5054A is then complete and the device is ready for use by the diagnostic application.
VAS 5054A supports following vehicle bus systems:
K line (ISO9141-2);
High-speed CAN (ISO 11898-2);
Low-speed CAN (ISO 11898-3);
J1850 (SAE J1850);
Last,what I wanna notice you is that VAS 5054A hardware supports online coding, but the software doesn’t support online coding, it needs to use VW dealer’s software.
VAS 5054A is a commonly used diagnostic interface for all vehicles of the VW Group and all OBD vehicle systems from other manufacturers. Now the newest version has came out–ODIS V2.0,Bluetooth version.It supports multi-language,such as:English, Chinese, Japanese, Portuguese, Romanian, Korean, Dutch, Polish, Turkish, Spanish, French, Italian, Croatian, Danish, German, Swedish, Finnish, Slovenian, Czech, Russian, Greek and Polish.
When using the VAS 5054A,users don’t need to use cables for vehicle diagnostics.The integrated Bluetooth interface connects the vehicle with a notebook, PC or test system. And the wireless Bluetooth connection can range from 2 to 5 meters without interference or blocked, so, to some extent, the exact result depends on the environment and the type of Bluetooth adapter that used on the PC side. Besides,the Serial Port Profile (SPP) is used for data transfer via Bluetooth, it supports different Bluetooth security levels.
About the Specifications of the VAS 5054A, the vehicle protocols are handled directly in the VAS 5054A so that it can make sure fast response times and a reliable real-time behavior independently of the PC operating system. Each time there establishes a connection, the VAS 5054A software will be identified with the version installed on the application PC. The VAS 5054A thus automatically employs all new features that provided after a new software version has been installed on the application PC.The diagnostic application and the associated Diagnostic Base System are all installed on the application PC. And the diagnostic base system can access to the VAS 5054A via Bluetooth or USB.
VAS 5054A is a universal diagnostic interface lines, mainly for Volkswagen Group vehicles and automotive OBD systems from other functions.
The integrated Bluetooth interface connects the vehicle to a laptop, desktop PC or test system. When using the VAS 5054A diagnostic vehicle, you need to use another cable to connect it!
Wireless connection depends on the surrounding environment as well as the specific distance plugged into the computer’s Bluetooth adapter. Serial Port (SPP) is used for data transfer via Bluetooth. Bluetooth can support different security levels.
Communication protocols can support the following vehicles:
… K-line (ISO9141-2)
… High-speed CAN (IS0 11898-2)
… Low-speed CAN (ISO 11898-3)
… J1850 (SAE J1850)
Which can be handled directly in the VAS 5054A vehicles protocols. This ensures fast response and reliable real-time performance, rather than rely on computer systems. Each time a connection, VAS 5054A software applications are installed with the version of the program on your computer to synchronize updates. Therefore, when a new version of the software installed on the computer applications, VAS 5054A can automatically adapt to any new features.
Diagnostic application and the associated Diagnostic Base System applications installed on your computer, the diagnostic base system can access VAS 5054A via Bluetooth or USB.
Access via Bluetooth:
When a connection is established with the VAS 5054A Bluetooth software provides a virtual serial port, diagnostic base system through this serial connection to the VAS 5054A. When you install the diagnostic application, you need to make special note of this serial.
Access via USB:
Via a USB cable to connect the VAS 5054A to the application PC serial port through joint detection VAS 5054A, and you install the diagnostic application is automatically installed drive.