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Monday, August 11, 2014

Toyota Corolla car can not be a cold start

     A mileage of about 138,000 km, assembly 1ZZ engine 2005 Toyota Corolla sedan. Customer reflect: the car stalled vehicles placed for some time, for the first time does MST-9001D not start, repeat start after two or three times to be successful.
     Failure Analysis: According to the customer said the vehicle is placed over 20min, and she was unable to start the vehicle again, two consecutive times to start the vehicle. The reason for this failure is probably generated by poor fuel oil or ignition system. First check the vehicle fuel pressure, fuel pressure test gauge installed gasoline, start the engine oil pressure is 320kPa, normal. After a slow flame fuel pressure drops to 0kPa, leak quickly, without keeping oil. Hydraulic test after suspected petrol pressure regulator valve failure, replace the fuel pressure regulator. After fgtech galletto 4 v 54 starting the engine stops when the fuel pressure is 320kPa, after the flame fuel pressure dropped to about 200kPa not move normally.
     Troubleshooting: Replace the problem resolved petrol pressure regulator valve.
     Failure revelation: the rational use tool that can quickly solve the problem.
     Failure Comments: This is a very simple fault, but if the idea is not clear, check, determine it is not necessarily able to quickly find the root of the problem. So we need to have a correct diagnosis of ideas, while rational use of equipment, so as to do more with less.

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Wednesday, August 6, 2014

Subaru Outback not start after flameout

  A mileage of about 56,000 km of the 2011 Subaru Outback. Customer reflect: the car has traveled 55213km, suddenly appeared a few days ago with the way the fault lamp is lit, the flame can not be started again after step aside, stop check request.
     Troubleshooting: Customer stop after an appointment, arrange for service technicians to check on the car, using SM3 diagnostic check engine diagnostic system, found fault code display P0890 AT self-closing relay failure. In order to determine whether the obd2 scanner occasional failure, so maintenance technicians will remove the fault code, then open the key, the vehicle a smooth start.
     Repair phenomenon seems different now, and then accompany clients road test also found no abnormalities, are occasional unexplained fault really? Unexpectedly, when the pit by a deceleration zone, bumped observed AT OIL flash on the instrument, and then turn off the vehicle into the shop, connected to diagnostic trouble code check, or initial fault code.
     When trying to start the vehicle again and found that the vehicle has been unable to start, just to hear the starter there, "da da da" sound. Erupted fault though reproduction, but the technician thought it might be battery power loss or power generator is not caused. Borrowing a new battery from the warehouse, but still can not start after installed.
     Honestly in accordance with DTC, it was discovered that the fault code relay is actually referring to TCM's power supply.
     Check the relay lines are good, also found no loose phenomenon, taken down to check on the relay itself, static testing and dynamic testing were also normal. At this point we doubt whether there is poor contact TCM itself inside the phenomenon exists, but did not because of the site which models TCM, so had to relay and TCM loading, try a hand car diagnsotic tool to shake these two components were tested, shaking and tapping TCM, failure did not occur, but beat the relay when, AT OIL suddenly lit on the instrument, then immediately turn off the engine while the vehicle can not be started again.
     Then you can say to the failed component was finally determined, that is the relay inside the TCM has a loose place, when after a bumpy road this failure phenomenon will occur. Replacing a relay troubleshooting.
       Failure Summary: regular maintenance in the mouth, when faced some failure, failure to follow judge's logic, especially when there has been relatively clear diagnostic trouble codes do reference, do not be ignored.
     In this case because of maintenance technicians with experience from start machine "da da" sound, derived battery failure, so take a detour.
       After three packs of policies for our maintenance work is also a test of the vehicle to be repaired in a short time, then determine the fault is particularly important.
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Tuesday, July 22, 2014

Adverse Skoda Octavia car air conditioning systems work

Symptom: a 2008 factory Skoda Octavia 1.6 L sedan, manual air-conditioning system, the tuirel s777 cumulative traveling about 80,000 km, reflecting the open air with the owner after ten minutes, the natural air conditioning vent blowing wind, and only after the engine flameout re-start, the air conditioning system to return to normal work. The fault has lasted one week.

Inspection and analysis: Connect VAS 5052 test, the vehicle traveling about 10min air conditioning vent natural wind began to blow. Read conditioning system data block group 1, shown as onboard power supply control unit (J519) issued a shutdown signal conditioned by CAN. Gateway into the list, are not the fault code stored in each control unit.

What is the reason for the air conditioning ktag turned off Nick defender J519 engine flameout after re-launch, the starter engine start feeling the moment seems to have a brief pause, the engine can smoothly start the machine, though, it feels as if the battery power is low. Suddenly thought would not be onboard power supply control unit (J519) detects the battery voltage is too low and closed the air conditioning system? Then open the engine compartment lid to check the battery and found that the car had to replace the battery, the negative terminal oxidation serious, measuring battery voltage of 12.2 V, the air conditioning is turned on to start the engine, and then measuring the battery voltage is only 12 V or so. Measuring the generator output voltage is normal. It seems that the problem is out on the negative battery terminal.

J519 original car's power management function, when the engine is running, J519 detects the battery voltage kess v2 drops below 12.2 V will close the air, due to the negative terminal of the car battery severe oxidation, leading to poor charging system charging, when air conditioning is turned on and after the headlamp high-power electrical equipment, battery voltage is low, thus automatically cut off the air conditioning system to work.

Troubleshooting: Clean the battery negative terminal.
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Monday, July 21, 2014

When Honda rhyme can not start the car cooler

When Honda models rhyme (Stream) vehicles, model JHMRN3, 2002 model year, the cumulative traveling 190,000 km.
Symptom: the engine is cold (in the morning) does not start.
Troubleshooting: The car is the first time I was dragged to plant maintenance.
Test found that the SVDI VAG engine is indeed difficult to start, but the starter is operating normally. First, check with HDS, trouble-free code. Then check the ignition system, disconnect the ignition coil wire side of the three-pin connector cable, turn the ignition switch, measure the voltage of the power supply terminals for the battery voltage is normal. Then remove an ignition coil, spark plug mounted on the standby flashover test, spark plug arcing normal operation of the starter, then remove the spark plug to check the car, found four spark plugs have been soaked in petrol head, when it replaced the 4 only the spark plugs, and then test found that the engine can be started immediately with the machine, check with HDS, no abnormalities, the car factory.

On the third day they can not start the car engine, drag to plant dismantling and found gasoline spark plug has been flooded wet, so regular checks. Measurement of cylinder pressure, were about 1.1 MPa, normal. After cummins insite measuring the fuel system pressure is 320 kPa, the pressure to keep the flame 30 min at about 150 kPa, fuel system pressure is normal.

Check the engine with the HDS data stream, also found no abnormal data. Remove the injector testing, each injector fuel injection quantity and atomization well without fouling and leakage phenomenon. Because when the spark plug engine can be started with the drying machine, indicating that the car has an engine start conditions, so the car will be parked in the shop and so the next morning to check again.

The next morning before starting the engine remove the spark plug first observed no petrol head attached to ktag observe the interior of the cylinder through the spark plug mounting hole, with a strong flashlight visible liquid piston crown seems to have the presence of a thin wire with a fixed period of approximately 20mm long White touches top of the piston to obtain the top of the liquid. From the point of view of the liquid sample is not gasoline, antifreeze should be to check the remaining three cylinder piston top, but also have the presence of liquid, thus analysis of phenomena, suspected cylinder head gasket is damaged, but the owners reflect the engine temperature has been normal, check the tank and found antifreeze less about 1.5 L, add enough liquid to cool the machine after starting the engine, can be seen from the mouth of a small amount of added liquid bubbles emerge, accelerating the bubble increases, thus conclude that indeed cylinder head gasket is damaged.

Decided to replace the cylinder head gasket. Remove the cylinder head inspection, the cylinder Transponder Chip head flatness error in 0.15 mm or less, you can continue to use. After replacing the cylinder head gasket test, the engine start-time success. The next morning and then start the test, the engine smoothly with one-time machine, the failure to completely eliminate.
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Friday, July 18, 2014

BMW engine temperature is too high

    BMW Mini (MINI) sedan, the cumulative traveling 20,000 km, the engine temperature is too high, sustained high-speed electronic fan running phenomenon in motion.

    It reflects the owner, the ktag car appeared yesterday afternoon indicating high coolant temperature phenomenon, the next day will be just a few minutes after starting the engine with the engine coolant temperature gauge will display the engine temperature is too high, and then touch the radiator the upper and lower tube, the feeling is slightly hot, but did not feel the engine reaches normal operating temperature. After the car for repair, first with GT1 fault detector test, the engine electronic control unit (DME) is no fault code stored, read data stream found that the temperature of the engine coolant is 81 ℃ (car radiator fluid outlet does not coolant temperature sensor, it is impossible to determine the work through the thermostat temperature difference); because the fan is in high speed electronic state, read the refrigerant pressure within the air-conditioning control unit for 0.6 MPa, normal. According maintenance experience, after a long HK201 J2534 VCI period of operation of the engine coolant temperature indicator is too high, but on the radiator, liquid pipe temperature is very low, usually caused by faulty coolant pump, then did not give much thought to the cooling temperature and coolant temperature indicator gauge indicates the temperature difference between the fluid temperature sensor indicates, it is removed to check the coolant pump, coolant pump impeller found no skid marks or broken.

    So what is the cause of the engine temperature indication is too high, sustained high-speed electronic fan running it? By analyzing the vehicle cooling system control components, under normal pressure of the air conditioning system, the DME engine rely on two-wire negative temperature coefficient of coolant a temperature sensor to sense the temperature of the engine, only when the coolant temperature sensor fails, only the Transponder Chip actual temperature of the engine may cause a low, but the meter indicates engine temperature phenomenon. Remove the rear cylinder head coolant temperature sensor to measure its resistance to 510n. Because they do not know the standard range of the sensor, desperation can only replace the coolant temperature sensor, and then test found that the above symptoms disappeared.

    Analysts believe that the real reason for the above phenomenon is due to the coolant temperature sensor failure, causing coolant temperature signal response is too slow, making the engine warm-up time exceeds the maximum limit specified, then the engine entered CN900 Key Programmer the pre-set emergency operation mode, so that the actual engine temperature has not increased. In the actual troubleshooting process, ignoring the difference between the temperature of the coolant temperature coolant temperature sensor and instrument display indication of the details, take a lot of detours lead.

Thursday, July 17, 2014

A Professional Auto Diagnostic Tool-Tuirel S777

     You know Tuirel S777? what is it? What features does it have? Maybe you are not very clear, okay, let's take a look at some of the things about it.
     Tuirel S777 is a hand-held auto scanner that can help you trouble-shoots all the electronic systems of your vehicle efficiently, it’s much more than an OBDII scanner with multifunction, it approaches and competes with professional auto diagnostic tools. It integrates the needs of DIY users and professionals with selectable vehicle software and high frequency of update.
     So why should we get Tuirel S777? The first,Tuirel S777 With total 46 car software which you can download here.secondly,It can update online and dealer code is F000001. Finally,It Support Multi-Languages: English/ Spanish/ Portuguese/ Serbian/ Farsi/ German/ Italian/ Arabic/ French/ Greek/ Korean/ Czech/  Russian/ Turkish/ Japanese/Polish.You may also want to ask, that if it can do it in my car, do not worry, it supports many models, the models presented here supports it, you can know that it is not suitable for your car slightly!(Tuirel S777 Vehicle List: Austford, Audi, Benz, BMW, Chrysler, Daewoo, Daihatsu, Euroford, Fiat, GM, Holden, Honda, Hyundai,Jpisuzu, Kia, Lancia, LandRover, Mahindra, Maruti, Suzuki, Mazda, Mitsubishi, Nissan, OPEL, Perodua, Peugeot, Porsche, Proton, Renault, Vauxhall, Romeo, Rover, Saab, Skoda, Smart, Toyota, USAFord, Volvo, VW, Jaguar,Citroen,OBDII,Seat, Sprinter, Ssangyong,Subaru,Demo)
     Tuirel S777 as a professional automotive diagnostic tools, but also has its own characteristics and powerful features, The most basic features include: Read ECU information, read faults, clear DTCs, read data stream, component testing.It can also communicate with CAN-BUS bus and K communication cable testing, supports the following protocols: PWM, VPW, KWP2000, ISO9141, CAN-BUS.More attractive is the nine features:①Can read and clear codes on ALL electronic systems,②Supports all OBD II protocols, Can (Controller Area Network) and all test modes including Read Codes, Erase Codes, Freeze Frame, I/M Readiness, O2 Mon.Test, On-Board Mon.Test, Component Test and Vehicle Information.③Vehicles before 1996 can be diagnosed.④Faster and stable diagnostic speed with unique new platform.⑤High frequency of update up to professional auto diagnostic tools⑥High definition touch display provides high sensitivity with screen locking/unlocking function.⑦Capture, save and print screenshots for convenient troubleshooting.⑧Support mass storage SD card.⑨Compact and attractive housing with protective rubber case makes it more durable and impact-free.
     This is Tuirel S777, a professional car diagnostic tool, is not it have a deeper understanding of it!
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