2017年8月18日星期五

How to diagnose and solve Auto Cylinder Leak

Cylinder leak detection using the cylinder leak detector.The basic principle of the test is to use the compressed air filled into the cylinder, with a pressure gauge to detect the piston at the end of the compression at the end of the cylinder when the Yanhua DR-Key adapter pressure changes, to characterize the entire cylinder group of OBD2 sealing.That is, not only the seal of the piston piston friction, but also to characterize the intake and exhaust valve, cylinder liner, cylinder head and cylinder seal.

 (1) cylinder leak detector structure and working principleDomestic QLY-1 type cylinder leak detection Diagspeed MB Key device mainly by the pressure reducing valve, intake pressure gauge, measuring table, calibration orifice, rubber hose, quick change pipe fittings and inflatable mouth and other components, as shown in Figure 2-12 The In addition, there must be an external air supply, a pointer to the piston position and a piston positioning plate.The pressure of the external air supply should be equivalent to the cylinder compression pressure, generally should be 600 ~ 900kPa. Compressed air according to the direction of the arrow into the cylinder leak detector, the pressure from the intake pressure gauge display.

WithAfter which it enters the cylinder at the end of the compression end through the pressure reducing valve,Fcar FVCI Passthru tool the calibration orifice plate, the rubber hose, the quick change pipe fitting, and the inflatable nozzle. The pressure change in the cylinder is shown by the gauge. The pressure changesThe condition indicates the seal of the cylinder block.Cylinder Leakage Diagnostic Parameter StandardFor the cylinder leak, China has not developed a unified diagnostic parameters. Auto Repair

QLY-1 Cylinder Air Leakage Detector In the instruction manual, for the engine of the domestic truck, when the inlet, the exhaust valve and the cylinder liner are well sealed, the cylinder seal condition (mainly refers to the cylinder piston) Judgments can be dealt with in Table 2-6. When the meter reading is greater than 250kPa,Cylinder piston with sub-sealing conditions meet the requirements, the engine can continue to use; when the meter reading is less than 250kPa, the cylinder plug with the deputy seal does not meet the requirements of the engine cylinder to be ring or boring cylinder. Transportation industry standard JT / T201-1995 "vehicle maintenance process specifications" in the vehicle before the second maintenance of the use of the reference diagnostic parameters of the standard requirements of domestic Dongfeng EQ1090 and the liberation of CA1091 car cylinder leak, When the cylinder piston is placed in the static compression top dead center position, the measured gauge pressure should be ≥ 250kPa.

2017年7月26日星期三

What Is Auto Immobolizer System?

Car theft system refers to the system that prevents the car itself or the items on the car from being stolen. It consists of electronically controlled remote control or key, electronic control circuit,CGDI Prog alarm device and the implementation of institutions and other components.  


The earliest car door lock is a mechanical door lock, only for car driving to prevent the door automatically open and accident, only the safety of traffic, can not afford the anti-theft effect. With the progress of society, the development of science and technology  SKP1000 Programmer and the increasing number of cars, and later the manufacture of cars, trucks doors are equipped with a key lock. The door locks only one door, and the other door is opened or locked by the door lock on the door VVDI Key Tool

In order to better play the role of anti-theft, and some cars also equipped with a steering lock. The steering lock is used to lock the steering wheel of the car. The steering lock is locked with the ignition and is installed under the steering wheel, which is controlled by the key X431.

 That is, the ignition lock cut off the ignition circuit to turn off the engine, the ignition key and then left to the extreme position of the gear, the latch will be extended into the steering shaft slot, the car steering shaft mechanical lock. Even if someone will open the door and start the engine illegally, because the steering wheel is locked, the car can not be turned, it can not drive away, so played a car anti-theft effect Fcar F3-G

 Some cars are designed and manufactured without a steering lock, but with another so-called crutches lock the steering wheel, so that the steering wheel can not turn, but also can play an anti-theft effect. Some cars in the transmission with a mechanical lock, the transmission lever is locked, so that the theft can not be linked to the car can not move. Ignition switch is used to turn on or off the engine ignition system circuit, according to a key to open a lock of the truth, but also played a certain anti-theft effect. As the car technology continues to develop, most cars are installed on the central door locks, that is, the car door locks and luggage compartment lock to achieve centralized control.

2017年7月13日星期四

Magenta Pump Leakage Coolant Failure Case

Vehicle Information
Model: MAGOTAN 1.8T
Symptom:

MAGOTAN 1.8T new car more than 4,000 kilometers of water pump leakage of coolant, replace the pump after driving more than 1,000 kilometers, the pump once again leak antifreeze.Launch X431 Tool


Fault analysis and maintenance process Vpecker E4
1. When the vehicle travels 4011km, the station checks the leakage antifreeze. After checking the water tank, it leaks the antifreeze, removes the water pump and finds that the temperature inside the side outlet of the thermostat is damaged.Fcar F502
2. Replace the pump after the vehicle and travel about 1000km, once again complained about the antifreeze and leakage, check or water leakage at the pump antifreeze. Remove the pump to find the pump or in the side of the thermostat side of the outlet is damaged, the damage is the same as the first, (as shown below)
Professional DPF+EGR Remover 3.0
3. Because this vehicle is a new car and the damage location of the two pumps is roughly the same, analysis and pump quality problems caused by the probability is not that there should be other aspects of the problem, resulting in a series of damage to the pump.OBDSTAR TP50


On the form of damage to the pump, there are several possibilities:


1, the quality of the pump itself is a problem
2, the installation location of the pump problem
3, the installation of the pump cylinder surface protruding
4, there are external forces lead
4 because the water has been continuously damaged two pumps, analysis of the pump itself is unlikely to cause the problem; the new pump smear sealant, check the location of the pump installation; the engine block and the pump surface of the flatness of the inspection, Check the flatness normal.

5. In the process of inspection SBB Key Programmer found in the 2-cylinder, 3-cylinder injector at the bottom of a large number of yellow gasoline residue traces (as shown below), combined with the customer response sometimes in the cab can smell the smell of gasoline. Analysis of the traces should be leaking out of the gasoline traces, but the leakage of gasoline and water pump damage is it?



6. Further inspection VVDI found that the pump seal some swelling (see below), originally thought that the pump shell damage after the shell elongated, and now look at the petrol bedroom seal, resulting in swelling, and thus bulging the shell Body, causing leakage.


7. From the oil point of view 2 cylinder 3 cylinder position traces of gasoline traces more serious, remove the 2 cylinder, 3 cylinder nozzle, can be observed in the 3-cylinder fuel injector plug with gasoline, the surface of the gasoline flow trace. To determine the fault is caused by the 2-cylinder, 3-cylinder injector oil spill. The results replaced the 2-cylinder, 3-cylinder injector, and replaced the 1-cylinder, 4-cylinder nozzle seal.

8. After the vehicle is shipped, it is tracked, the next day the customer feedback feels good. And after a few days of customer feedback, in the cab and smell the smell of gasoline. Immediately about customers to check.skp900 programmer

9. Vehicles came to the service station, open the engine compartment, you can smell the smell of gasoline. Because the car's fuel injector installed in the lower part of the inlet, the eyes can not look directly to, in order to be able to accurately find the leakage point, learn the first two training lessons, in no hurry to disassemble and repair. The engine was in a state of fire, carefully observed in the bottom of the 4-cylinder injector formed gasoline droplets, check found in the top of the 4-cylinder injector, from the rails to leaking gasoline.


10. After removing the rails, observe that the guide rail has a vertical groove at the installation of the 4-cylinder injector. Sealed the place, put the rails up, into the gasoline, after a period of time, can be observed from the vertical at the vertical leakage of gasoline. (Pictured)


Failure analysis:

Because the 4-cylinder fuel rails have cracks, resulting in gasoline leakage, leaking out of the gasoline gradually immersed in the pump seal, the ring erosion swelling, resulting in damage to the pump, leakage antifreeze,


Troubleshooting:

Replacement of oil rails and pumps


Special tools / equipment: T10133 torque wrench VAS6150B OBD2


Maintenance Summary:

Water pump leakage is a more common fault, but the new car in the short term continuous damage we first met. The second maintenance, although checked out of the gasoline leak, led to the pump seal inflated, but did not find the root cause of the problem. On the one hand is the main location of the fuel injector installed in the lower part of the inlet, the naked eye can not be observed; the other hand, our inspection work is not enough detail. Need to sum up lessons learned. Do a good job of technical work, to study the investigation, root cause.

2017年6月28日星期三

Automobile Power System Key working principle

The electrical power used in automotive electrical equipment is a DC power source, which comes from batteries or generators. The electrical system, which is connected by batteries, generators, regulators, charging status indicating devices, switches and wires, is called a power supply system (referred to as a power supply system).UCANDAS VDM2

The work of the automotive power systemThe battery and the generator in the MB SD Connect C4 power supply system are working in parallel. When the engine is in normal operation, the generator is powered by the generator and charged to the battery. At the time of starting, the battery supplies power to the starter. As the generator is driven by the engine through the drive rotation, when the engine speed changes, the generator output voltage will change. To meet the requirements of automotive electrical VAS5054A equipment and battery charging constant voltage, the power system are set within the voltage regulator to ensure that the generator output voltage stability in a certain range, to prevent the voltage fluctuation is too large and burn the electrical equipment. The charging state indicating means indicates the charge / discharge condition of the battery.

The layout of automotive power systems   VVDI2
At present, the power system on the car can be divided into 12V power system and 24V power system, and the general use of alternator and electronic regulator.Key Programmer
According to the electronic regulator installed in different ways, the power system layout can be divided into separate and integral two.key cutting machine
The distinctive features of the integral alternator power supply system are:
There is no longer a wire connection between the alternator and the voltage regulator. The system line is greatly simplified and the failure rate is greatly reduced. But the system failure can not quickly diagnose the failure of the car parts
CK100 Key Programmer
In recent years, with the people riding comfort, fuel economy, environmental protection requirements of the increasing, new electrical installations in the car has been widely used, the proportion of automotive electronic accessories increased significantly, such as a variety of Electronic control system (electronic control jet, electronic control automatic transmission, electronic control suspension), cruise control, car computer network.Diatronik OBD Tool

Some electromagnetic or electric actuators have also gradually replaced the hydraulic drive and pneumatic actuator, which greatly increases the load on the electrical system, which requires the car's power system to provide higher power.
http://www.car-auto-repair.com/

2017年6月22日星期四

Launch X431 iCarScan and Vepcker Easydiag Test Report



Launch iScan accept a lot added options on that car again vpecker, for archetype on engine it can alone Launch X431 Diagun IV apprehend few ambit and it can apprehend and bright agitation codes thats it annihilation abroad on engine not even dpf regeneration, idiag accept added to action for that car, i activated on few added cars. I anticipate what it can do added with appropriate functions is for Toyota,Honda,Scion. But back it is aboriginal interface and software amount is ok for it (cost $210).Launch X431 Pro3
So for now vpecker OBD2 scanner is acceptable because it is even abundant faster than barrage and aboriginal for acceptable amount ($159), but not even abutting to Delphi or Barrage because of the functions that it cannot do.Launch X431 Pro3
Update
VPECKER Esaydiag and iScan accountability cipher clairvoyant are adapted online via Win XP~Win 10 system. Actual actual simple to update. So they can plan for all cars until 2015.Launch X431 Pad2
Language
Vpecker does bigger in accent compatibility, accoutrement 25 capital languages worldwide; while Barrage seems less, with 9 languages only. So if languages depend on customers, Vpecker will awning more.Launch X431 PAD 2


 1. Full Diagnose Function:Launch X431 Diagun IV
X431 diagun iv can diagnose the electronic control system of prevailing vehicle models covering Asian, European, American and China. Full range car models and full car system diagnose make it a professional automotive diagnostic tool.
Diagnosis functions include: Read DTCs, Clear DTCs, Read datastream, Special functions etc;
 
Ps. Vpecker language:
Italian, Chinese (Simplified), English, Chinese (Traditional), Japanese, German, Russian, French, Spanish, Portuguese, Polish,Turkish,
Dutch, Hungarian, Korean, Czech, Arabic, Indonesian, Persian, Thai, Vietnamese, Finnish, Swedish, Romanian, Bosnian, etc.
Launch language:
English, French, Russian, Japanese, German, Spanish, Italian, Portuguese, Chinese
That’s it. I should say, anniversary one has its own claim and demerits, but both VPECKER Esaydiag and Barrage X431 iCarScan plan ok until now. A acknowledged acquirement from China.

How to detect Auto GND badness?

01 starter operation, if the battery grounding wire temperature is too high, even at the end of the phenomenon of red on the ground, indicating that the battery grounding wire contact bad.X431 Tool

02 in the case of non-charged measurement of the resistance value of the ground point, that is, with a multimeter of a table pen reliably connected to the wire, Yanhua Digimaster 3 another pen and metal parts of the body connected to measure the resistance between them, if there is resistance, The VXSCAN EL-50588

03 using simulated vibration method. For the suspected parts, you can in the vertical direction and horizontal direction gently shaking the line, to simulate the state of TOYO KEY OBD II vibration when driving the car, while observing the reaction of the relevant parts to determine whether the ground with Weld, loose, poor contact or wire break phenomenon.Autel MS906  If you shake a ground line when the fault reproduction or failure disappeared, indicating that the bad place where the ground here.

04 When the circuit is energized, the voltage drop of the tapping point is measured with a multimeter. The reading should be as low as possible (close to 0). The method is to start the engine,Xhorse Condor XC-002 the use of multimeter DC voltage block, the red pen touch the generator output, black pen touch the engine body, measured a voltage value; and then the red pen touch the output of the generator, black pen contact The metal part of the frame, and then measured a voltage value. Under normal circumstances, these two voltage values ​​should be consistent. If the Autel MS908P former value is large, the latter value is small, a difference of 0.5V or more, indicating the existence of more than 0.5V voltage drop, it is by the engine body and the frame caused by bad grounding.

Detection of a point of the situation, it should be measured at the point of the power supply voltage, try not to measure the point of the negative resistance of the power supply, this is because the multimeter itself has a certain internal resistance, measured the resistance value of the larger error.

2017年6月19日星期一

Toyota Land Cruiser 4700 service light reset

Toyota Land Cruiser 4700 sedan with a warning light, every 50000km will be lit, which means that the timing brought to the time,SKP 900  the replacement of the timing belt after the service light reset.x431 tool


(1) The first maintenance lamp zeroing method is as follows.XTUNER X500
1) Turn off the ignition switch when the odometer displays the "ODO" total mileage.
2) Press the short stroke button "trip" to turn on the ignition switch and keep it for 5s.
3) release the short distance mileage button "trip", in 5s and then press the short mileage button, the instrument displays "ODOXXXX".OBDSTAR X300 Pro3
4) Press the short distance button and keep it for more than 5s.
5) The warning light goes off when the check display becomes "ODO".
6) If the warning light goes out, restart the engine warning light off.
7) If unsuccessful, re-operate again.

(2) The second maintenance lamp zeroing method is as follows.Autel PS100

Press the mileage zero button, and then turn on the ignition switch 0 or 1, with the button to adjust it to 8, press the button again, wait for the screen to display mileage, turn off the ignition switch.obd

To zero, remove the rubber stopper beneath the dashboard, use a small tool through the dashboard hole, press the dashboard key to zero, re-set, and then check whether the warning light is still bright With