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Friday, October 10, 2014
Thursday, October 9, 2014
Toyota adventurer can no longer start after flameout
Production plant: Toyota Motor Corporation
License plate number: adventurer E-VCV10
Engine Grades: 3VZ-FE type
Year: 1992
Mileage: 77000km
Failure Symptoms: can not start the engine flameout.
Troubleshooting: the fact that the engine can not start from the basic checks begin. After basic checks, the results did not harvest. Remove the spark plug, the spark plug with a thin layer of the adhesive gasoline, like ignition systems. Are recognized when the installed vas 5054a lamp ignition spark timing light does blink, indicating that there is an ignition spark. So in the end there is no ignition spark it in the cylinder?
To confirm that there are no ignition spark inside the cylinder, the cylinder pressure conditions do simulation spark test, for which the central high voltage cable unplugged, the cable from the left and right cylinder head 10mm, 10mm air gap to do that to keep the spark test, the results of the spark is normal. Then pull each cylinder spark high voltage cable test results done in the air gap of 10mm only when there is no spark, but also "pop jack, black jack" sound leakage. Reduce the air gap, there sparks flying.
Remove the distributor cap and distributor rotor, where the side has come out of its hole burning due to leakage.
In order to track down the real cause of the failure, perform a variety of investigations. The results of high-voltage cables is high resistance value, the reference renault diagnostic tool value is generally a high voltage cable is 16kΩ / m, and this engine is the resistance value of the high voltage cable 30kΩ / m or more, some of which reach 32kΩ / m. After the secondary circuit resistance increased demands increased voltage ignition coil, resulting in insulation breakdown weaknesses leakage.
High voltage cable disconnection, high-voltage terminal of the ignition coil to the low-voltage terminal leakage, closed magnetic coils into open magnetic coil, without leakage to the outside, it is difficult to find.
http://www.obdnews.com/index.php/bmw-diagnostic-tool/
License plate number: adventurer E-VCV10
Engine Grades: 3VZ-FE type
Year: 1992
Mileage: 77000km
Failure Symptoms: can not start the engine flameout.
Troubleshooting: the fact that the engine can not start from the basic checks begin. After basic checks, the results did not harvest. Remove the spark plug, the spark plug with a thin layer of the adhesive gasoline, like ignition systems. Are recognized when the installed vas 5054a lamp ignition spark timing light does blink, indicating that there is an ignition spark. So in the end there is no ignition spark it in the cylinder?
To confirm that there are no ignition spark inside the cylinder, the cylinder pressure conditions do simulation spark test, for which the central high voltage cable unplugged, the cable from the left and right cylinder head 10mm, 10mm air gap to do that to keep the spark test, the results of the spark is normal. Then pull each cylinder spark high voltage cable test results done in the air gap of 10mm only when there is no spark, but also "pop jack, black jack" sound leakage. Reduce the air gap, there sparks flying.
Remove the distributor cap and distributor rotor, where the side has come out of its hole burning due to leakage.
In order to track down the real cause of the failure, perform a variety of investigations. The results of high-voltage cables is high resistance value, the reference renault diagnostic tool value is generally a high voltage cable is 16kΩ / m, and this engine is the resistance value of the high voltage cable 30kΩ / m or more, some of which reach 32kΩ / m. After the secondary circuit resistance increased demands increased voltage ignition coil, resulting in insulation breakdown weaknesses leakage.
High voltage cable disconnection, high-voltage terminal of the ignition coil to the low-voltage terminal leakage, closed magnetic coils into open magnetic coil, without leakage to the outside, it is difficult to find.
http://www.obdnews.com/index.php/bmw-diagnostic-tool/
Chery cars vain Failure Analysis and Troubleshooting
Symptom: Starter can work, but vain car. The car was in the car repair shop, Chery single point EFI.
Check: First, starter able to work without a car, you can follow the car a prerequisite to maintenance. The car's gasoline prerequisite is that a cylinder pressure enough; two, ignition and ignition timing normal; three-cylinder mixture concentration standards. After investigation, the car enough cylinder pressure, fuel injectors in starting work and will fuel injection, while sub-cylinder line does not flash. The reason is not vain car flash. So check the cause can not flash. Car Boshi WU-2000B obtain obd2 code scanner fault codes. There are three historical fault codes, namely: the battery voltage is too low, the fuel injector is not working, speed sensor failure. But after clearing the fault code system normal, no fault, and car components Boshi WU-2000B for action test, sub-cylinder line can flash, action testing other components are normal; That electronic control unit and the system is normal . The car should be to regroup.
The car vain because the sub-cylinder car line does not flash. The ignition control system for the electronic control unit (commonly known as the computer board), and then check the car Boshi WU-2000B no fault codes; component actuation test can flash over, it seems normal. Therefore can not blindly break a dead end. Technically trouble, leaving a shortfall of a link, that inquiry. Thus, the original repair shop maintenance personnel recruited, this car was originally entered the repair shop, and when changing the gearbox casing, the speed sensor wire dial off, get a new sensor. We also focus on checking the speed sensor. The sensor for electromagnetic induction sensors. When the search operation by the starter, there is an induced voltage. No fault code. When dialing this speed sensor, when the re-start, the fuel injection nozzle is not. Therefore, the speed sensor can determine the work. This also in trouble. Is the computer board is damaged. The car is moved Digimaster III into the factory to the computer board should not be damaged. So we carefully analyzed, Chery single point EFI works. The system is Marelli produced I, A, W, 6F single-point fuel injection system. The system has no camshaft sensor, only one speed sensor, the sensor is fixed to the front of the transmission housing. Provide speed signal for ECU, while providing sub-cylinder signal. Because of the hands-free oscilloscope, waveform failed to see the speed sensor. Thus, the replacement of a speed sensor, and sure enough, that is the car moving along. At this point the problem is solved.
Analysis of reasons: a single point Marelli EFI system. Provided by the speed sensor and the speed signal while the signal point of the sub-cylinder top dead center, due to poor sensor performance, to provide a speed signal (the signal estimated to have bad), and therefore, fuel injectors to work, the system is no fault code. But it can not determine the dead, the ECU does not cause ignition, but not the car. A gotcha shoddy sensor.
http://www.obdnews.com/index.php/benz-diagnostic-tool/
Wednesday, October 8, 2014
Creader VII+ (CRP123) and Creader VIII (CRP129) Update and Registration Instruction
Step 1: visit
http://mycar.x431.com/pad/landingPageIndexCrv.action and click
icon "Update Tool Download".
Step 2: Download and install "Launch Creader Update Tool ",
after installation is complete, run it.
Step 3: in the following picture, select Language (English, Chinese,
French and Spanish available) and input product Serial Number
(the serial number is in the back of Creader VII+ /Creader VIII)
Step 4: click "Update" to enter the registration page, input Email
and Register Code, click "Submit".
http://mycar.x431.com/pad/landingPageIndexCrv.action and click
icon "Update Tool Download".
Step 2: Download and install "Launch Creader Update Tool ",
after installation is complete, run it.
Step 3: in the following picture, select Language (English, Chinese,
French and Spanish available) and input product Serial Number
(the serial number is in the back of Creader VII+ /Creader VIII)
Step 4: click "Update" to enter the registration page, input Email
and Register Code, click "Submit".
(Note: if you need Register Code, please refer to step 5 to step 8; if
you already have Register Code, after submit, skip to step 9. )
Step 5: the register code can be found in the Creader VII+ /
Creader VIII, how to find? Connect one end of the USB cable to
Creader VII+ / Creader VIII, and another end to the computer.
Step 6: Wait until Launch Creader enter the main menu, then Move
the mouse pointer to the "Help" icon, finally press the "OK button.
Step 7: select "Tool Information", then press button "OK".
Step 8: the register code shown below is the one needed to enter in
the step 4.
(Back to step 4 to input register code and continue)
Step 9: insert TF card into TF card reader, then insert the TF card
into the computer.
Step 10: restart the "Launch Creader Update Tool ", select the file
you need or click "All", then click "Download" to start the download.
Step 11: After complete download, take out TF card from TF card reader and insert it into the slot of Creader VII+ / Creader VIII, then
supply power for Creader VII+ / Creader VIII by the USB cable (one
end of the USB cable connect to Creader VII+ / Creader VIII and
another end to the computer) or by the vehicle diagnostic socket
(connect the OBDII connector of Creader VII+ / Creader VIII to
vehicle diagnostic socket ), after the Creader starts, it popup a
window prompting " System Upgrade- Sure Upgrade?", select "
OK" to upgrade.
Step 12: update complete!
Tuesday, October 7, 2014
Buick underpowered when driving and poor acceleration
Symptom: a Shanghai Buick sedan (fitted with electronically controlled V6 engine), when traveling always underpowered and poor acceleration. Check the engine and found serious shake when idling, the intake manifold has tempered the phenomenon hard acceleration.
Troubleshooting: First, clean the air filter, spark plugs and fuel filter replacement, but the fault obd2 code scanner remains. And the use of cleaner fuel injection system, with special equipment delivered to the intake manifold, when starting the engine, to the point of self-cleaning spray device, but did not work, remove the injector, using special equipment cleaning effect is not obvious. Then remove the air cleaner, hand to block the air intake throttle valve to reduce the filter inlet area of the main channel, the mixed gas concentration, the result becomes stable idling, acceleration no tempering, indicating that the fault direct cause is too lean mixture. So to test the fuel pressure, the fuel pressure gauge connected with a tee fitting the fuel pressure regulator and fuel injectors oil on the road between, start the engine and change the speed, the measured pressure values within the normal range. Later, they consider air flow mb star software sensor is an important factor affecting air-fuel ratio, they unplug the test. After unplug able to stabilize the engine idling, acceleration is also improved. Then remove it from the throttle body air flow sensor checks hotline is not broken, but there is fouling the hotline. Use spray cleaner directly after cleaning refitted test, troubleshooting.
Analysis of the causes, since long-term driving the car, did not carry out maintenance on the air flow sensor dust removal, resulting in the failure.
http://www.obdnews.com/index.php/benz-diagnostic-tool/
Troubleshooting: First, clean the air filter, spark plugs and fuel filter replacement, but the fault obd2 code scanner remains. And the use of cleaner fuel injection system, with special equipment delivered to the intake manifold, when starting the engine, to the point of self-cleaning spray device, but did not work, remove the injector, using special equipment cleaning effect is not obvious. Then remove the air cleaner, hand to block the air intake throttle valve to reduce the filter inlet area of the main channel, the mixed gas concentration, the result becomes stable idling, acceleration no tempering, indicating that the fault direct cause is too lean mixture. So to test the fuel pressure, the fuel pressure gauge connected with a tee fitting the fuel pressure regulator and fuel injectors oil on the road between, start the engine and change the speed, the measured pressure values within the normal range. Later, they consider air flow mb star software sensor is an important factor affecting air-fuel ratio, they unplug the test. After unplug able to stabilize the engine idling, acceleration is also improved. Then remove it from the throttle body air flow sensor checks hotline is not broken, but there is fouling the hotline. Use spray cleaner directly after cleaning refitted test, troubleshooting.
Analysis of the causes, since long-term driving the car, did not carry out maintenance on the air flow sensor dust removal, resulting in the failure.
http://www.obdnews.com/index.php/benz-diagnostic-tool/
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