Imagine starting your day early and you are bright, the car inspection 278 day is here and the family is accompanying you. Your daughter had informed you of the occurrence of the check engine light and you feel some sense of worry. The worry is partly due to the fact that your daughter has informed you of the state of gas in the car cylinder which has quite a little amount of gas.
The fact that the engine light warning is not caused by the gas situation is one thing you make sure of. However, the gas is to be filled before going into the line for inspection. Sadly as it is, your car does not get to pass the inspection test with a full tank!
Though this comes with just the basic knowledge in OBD II scan tool use, which you are bound to learn from this write up, you can definitely use your tools to diagnose the trouble code on your car. So you can explore more and find out the step by step method.
Step 1: OBD II scan tool use
Since 1994, the second generation onboard diagnostic system OBD II has been used to replace the OBD I. It is the modern model which is mandated through the widespread industry regulation .the inability of this method to give trouble code scan results through blinks on the malfunction indicator light as it used to be in the former method of do it yourself (DIY) methodology, has been noted to be its greatest undoing.
Initially, the minimum you could spend when you visited a mechanic shop could be estimated to hundreds of dollars. However, learning to do it yourself could save a lot of money and time. An OBD II scan tool is definitely what you will need despite most people not having it on their vehicles.
The failure of the vehicle to pass an emission scan test should not be surprising, especially when the check the engine light persists. The significant effect to the vehicle emission is likely one of the reasons which may be causing the reappearance of the check engine light. Because of its ability to be able to detect other problems which may not be related to the check engine light is one reason why the OBD I is very important.
For some number of drive cycles, there is usually a likelihood that the trouble code remains within the engine computer memory, thus causing the check engine light to come on and off even after the performance of the trouble codes repair. The problem could have been even the signal for evaporative emission caused by the failure by your daughter to tighten the gas cap. When you switch on your car the next time, the code may go off probably after the system erases the trouble code from its memory. However, immediate erasing is possible by using a scan tool.
The scan tool is the best way to help erase the trouble codes, especially taking into account the several trouble codes likely to be coded with the many problems noted. The computer monitoring system is also usually erased when the scan tool is used or a battery is disconnected. The cause of car inspection failure is likely caused by taking the car before the driver achieves enough drive cycles necessary for one scan session.
The work of an OBD 2 tester is not only working to show you where the most complicated problems are found but also the simplest issues to do with your engine. What the technician could be looking for therefore will be within your knowledge.
Step 2: Code deciphering process
There are signals like the switch position, calculated load value, air flow sensors, throttle position, barometer readings, mass air flow, the fuel injection calibrations, ignition timings typical RPM, and the several engine operating data which are usually read using an OBD II scan tool. In some cases, when a trouble hiccup occurs during the drive, the capture mode within the OBD II allows for snapshot picture taking of the sensors for precision.
Step 3: Perform a sensor scan
The check engine light does not need to be triggered by certain trouble code that you are likely to detect with an improved scan process. The presence on the modern car model of the generic code PO713 can be an example of such codes recently discovered. It is usually called the high input or the transmission fluid temperature sensor circuit. The quick and complete failure of the transmission could be caused by the state of the transmission fluid running hot.
With enhanced diagnostics, a scan tool can save you a lot of worry and effort. As we did, you can also troubleshoot from the driver’s seat. With a simple push on the tester button, we managed to clear the trouble codes. However, on recheck, the code was quickly back. With a reading of 131 Fahrenheit, a rather normal transmission temperature reading, we cleared looking at it again.
Sadly, a bad connection in the sensor circuit was the problem. A defective error was what we discovered arising from the physical damage to wiring despite the wiring being good, was what we discovered on further pocking around.
Step 4: Choices of the scan tools
An OBD 2 is what you have if you have the latest car model. Though it may be generic and having several wires to connect, it does not mean it has to work with your car. The ones which may require software upgrade are usually the European latest models made in 1998 onwards. A case by case investigation can help unravel how the problematic Korean cars work.
The newest European models are hard to use with the upgraded OTC mind reader with chip for OBD I despite working well with Japanese and other older European cars in helping read generic OBD II domestic codes.
If buying a new OBD II model, the Actron scan tool for OBD I has a plug-in cartridge that is easily upgradable to work like the OTC mind reader.
A programmable scan tool is produced by the Auto X-ray. With more tools on the way, the Chrysler command tests are one of the tools among several we have tested that cover generic OBD II models which is also inclusive of the European codes. The internet will be the point of the software sale. Then you connect a cable during the online purchase and save the scan tool software on your personal computer and download it onto your scanner to use.
Through the latest scan tool models, upgrading Auto X-ray scan tool coverage of the OBD I from one version to the next can be done electronically.
With read codes and code erase function, the simple Actron CP9087 is the best scanner among the numerous OBD II scan tools from the Actron line. With this, you either get other code readings or nothing. A back probe adapter with a thinly curved metal terminal is one of the buying points that come with this low-cost device. For a test connection, a wiring terminal is what is used to make the probe to slip through a water sealed connector.
OBD II has had an off warranty system through the several years running to six full years when vehicles have been using this system. This is only a basic introduction because OBD II is a complex system. Logging codes and getting trouble codes has never gotten better with the OBD powertrain computer.
Step 5: The data transmission system by the OBD II
With safety systems, suspension, transmission, air conditioning antilock brakes controls which are usually connected to other computers, sensors, and switches which then circulate information. This is all a part of the heart of the modern vehicle’s communication network within the modern powertrain computer system.
The technician has to evaluate the available information coming from the computer powertrain system given the fact that this is what is in charge of the whole system affecting the engine emissions. Though fewer live terminals, ranging to half a dozen are available, a 16 terminal diagnostic connector is the wire channel through which the information travels.
The protocol’s use call on the manufacturers to program scan tool to be able to read the given codes. This is because of the lack of uniformity in the coding process. The problem arising with the modern European cars arise from the lack of standardization, though efforts are being made to have one transmission protocol.
The four different types of data transmission enhance the versions including other pins made with manufacturer specific data readings like the vehicle diagnostic system are some of the known stand and data pins in a standard connector.
Compatibility issues of the OBD II scan tools are however not sorted by the plug and play notion as witnessed by those who have this household PC based system. It is sad that when expected to, some of the European and Korean cars usually don’t always work when needed to. You should check with the manufacturer websites to know how to tell that you have the most current version of your scan tool.