What is the OBD readiness test

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What is the OBD readiness test

In contemporary practice of OBD 2 and car use, the question of car readiness test is usually a sour subject. Since the introduction of the first scan process, the on board diagnostic (OBD 2) scan tool use has been growing in leaps and bounds.

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What is the OBD readiness testThe discovery that the car engine system needed something that could help with the ease of repairs was the brain child of the Car Diagnostic Tool innovators. It has in the process brought in several issues which usually baffle its users. one is the question of whether the car is ready, for what?

To unravel the readiness query, the clear understanding of the OBD 2 scanners and readers. In the use of the on board diagnostics, there are various parameters which are important in the course of the whole data transmission process.

However, the most important parameter is usually the OBD readiness test. In the second generation on board diagnostics OBD 2 readiness is the standard measure through which the car engine computer and OBD screen are best to communicate.

This communication comes in two areas which may signal the yet to begin process or the completion of the whole scan process. In that regard, the OBD 2 readiness test has been found to comprise of some of the following processes;

The motor vehicle fault codes
The readiness status
The malfunction indicator light warnings

The vehicle fault codes

Since the introduction of the use of the OBD 2, use of special codes known as the vehicle fault codes has been the order of the day. These fault codes are usually categorized into two parts which are the vehicle manufacturer specific and the generic fault codes.

The vehicle fault codes

Vehicle manufacturer specific fault codes are usually found on the specific car model, these codes are read by the OBD 2 scan tools made by the specific car brands and may in most cases be limiting. The codes, which are in most cases called the trouble codes or just the diagnostic trouble codes (DTC) are merely data.

When the scan tool is connected and a scan process is initiated, the vehicle computer will send this data. With any detection of the trouble code as the vehicle fault inspection takes place; the vehicle is regarded to be faulty and fails to pass the car engine readiness texts.

When the DTC codes are detected, the vehicle is declared not fit for road use and the faults need to be corrected before the vehicle resumes operating or stops operating altogether.
The malfunction indicator light (MIL)

This is the most notorious of all the vehicle tests. The malfunction indicator light (MIL) as it is called is a special lighting system in the car diagnostic system. For its convenience, it is located somewhere on the vehicle dashboard for the driver to be able see it.

The malfunction indicator lightIf the vehicle develops any form of fault, the OBD 2 scan tool will turn on the lights thereby warning the driver of the existence of an eminent issue. The overall vehicle readiness status is only perfect when the MIL indicator light is found to be in perfect order.

The turning on of the malfunction engine light is not the only reason for the driver to stop driving the MIL is usually just a warning that something is amiss and may not be something which may endanger the driver’s life and enjoyment of the car use.

It is worth noting that with the light on, taking time to get the possible solution may help in taking back the car status back to its fit status, which is the dream of any modern motorist.
The car readiness status inspection results

This is the key area in car OBD scan use.  The status is usually a measure which is determined by the car inspectors by using the data from the on board diagnostic scan tool. Because of the manner in which the tools are connected, the inspection results are usually in the positive and the negative.

The car readiness statusThe positive test –OBD 2 scanners have some off as the most holistic systems which will go through all the vehicle faculties. The result is usually given when all the fault codes are run and the scan declares the car as ready and fit for use on the display.

When the car is declared ready, it means that the car is fit for use and can be allowed to be driven around. All the status readings for the car are usually readily seen on the car OBD 2 display screen, which are LED in nature for better display, on some of the modern OBD 2 scan tools

The negative test– this result on the car readiness will be assign that the car diagnostic scanner had not even checked the car engine and its various areas of function. Such a car may not be fit for use on the road.

According to the environmental protection agency regulations, any car which is not OBD 2 check ready is not fit to be allowed on the road. In spite of all these, the vehicle may still be on the road with certain special riders determined by the vehicle inspectors.
The non continuous monitors

When the car is declared to be not ready, there are several reasons which may cause it. One of the most common is when the non continuous car engine monitors are reading as not ready. This is usually allowed when the monitors in question are few. But when the number goes up, the vehicle readiness must be ascertained before being allowed on the road.

In some instances, it may take the effort of the one using the car to be able to claw back the car system into readiness by just following certain car use steps like driving the car to switch on the engine and let the OBD 2 scanner get the engine fault codes.

However, the most common remedy for most of the vehicle users is simply to check on the car battery and ensuring that it is in its perfect order. Some of the interior car accessories may also make the car to fail the test which is the more reason why the car has to be in top notch condition.
Instances for non readiness

There are instances when the OBD 2 doesn’t need to be used and the vehicle may be passed across as fit for use.  But this is not common and the car needs to just pass the OBD 2 readiness test to be able to give the user the exemplary service while also complying with the aim of the OBD use in the first place.

The OBD2 Scanner is simply the modern measure through which the vehicle gets to be passed as fit for use on the road. The passage is usually in most cases a process in itself and needs to be taken seriously.

The major reason is because the fact that the OBD 2 use is a legally binding process which may cause the driver to be charged for driving un-roadworthy vehicles.

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KESSV2 5.017 &KTAG 7.020

KESS V2 is a ECU programming tool that is perfect for OBD use,while KTag is perfect for Jtag, BDM and all the Boot application (tricore and ST10).

With KESS V2 you programming directly through the OBD port of the vehicle, while with Ktag you need to take apart the ECU and open it, after you can make the read/write operation.

Many ECU has the advantage that can be read and write from OBD port (so KESS V2 is perfect), but there are lot ECU that need to disassemble from the car and open and this is the case for all the ECU that need to be programmed with Jtag, BDM and Boot protocols, so KTAG is needed.


KTAG firmware 7.020:

Works better, faster and more stable than old versions

1.Adds 100+ ECU types & supports new car models e.g. Toyota 76FXXX, PSA 17.4.4, Ford E83, VW 17.5.5 (1766), Mercedes-Benz 276 ECU, Toyota 76F, etc.

2.More languages available:English, Italian, Portuguese, French, Deutsch, Spanish)

3.Better wiring description (in words not pictures).


KESS V2 firmware 5.017:

Compared to KESS V4.036, the KESS 5.017 has been improved a lot:

  1. 100% working
  2. No tokens limited
  3. With original database
  4. Windows 7 & Windows 8supporting, not only Windows XP
  5. Supports more cars & bikes & trucks unlimited tokens, fully activated

So, with Ktag v7.020 + Kess V2 v5.017, you can read and write ECU without token limitation for OBD, Jtag, BDM and Boot use for the new models and protocols.


KESS V2 V5.017 Software Display:












K-TAG 7.020 Software Display: