User manual

Generic OBD2 cont. - Section 23-B

Interfaces: Our HEX+CAN and HEX-NET interfaces support ISO 9141-2 ("CARB"), ISO

14230 ("KWP-2000") and ISO-15765 ("CAN") protocols. Our non-CAN HEX-, KEY-, and

KII- series interfaces support ISO 9141-2 ("CARB"), ISO 14230 ("KWP-2000"), but do not

support ISO-15765 ("CAN"). Our Micro-CAN interface supports ISO-15765 ("CAN"), but

do not support ISO 9141-2 ("CARB") or ISO 14230 ("KWP-2000") for generic OBD-II. The

ISO-15765 ("CAN") protocol was introduced in a few cars in model year 2004 and became

universally required in all cars sold in the US market for model year 2008.

Each Generic OBD-II mode is defined by SAE J1979 - the specification paper is available

from: www.sae.org

Below is a brief overview of what each Mode does, refer to a Factory Repair Manual for

specific information and testing steps.

Mode

Meaning

Read Data allows you to view real-time emissions-related sensor and status data

reported by the ECU. The sample rate can be sped up considerably by using the

[Turbo] button and by checking No wait for 2nd controller. Since Generic OBD-2

can request the same information from both the Engine and Auto Trans, it may

cause unnecessary delay for Engine readings if you aren't concerned about data

from the Auto Trans.

1-01

Readiness shows the status of each of the emissions systems monitored by the

ECU.

Freeze Frame shows the conditions present when an emissions-related fault last

occurred.

Current DTCs shows the present emissions-related fault(s). VCDS gives you a

checkbox to convert the code description into VW/Audi-specific ones.

Clear DTCs erases the Current and Pending DTCs. It does not repair the condition

that caused them. It will reset Readiness as well, meaning the ECU will have to test

monitored systems again before the corresponding bits read "Pass".

O2 Sensors shows the data associated with each O2 sensor, chosen from a drop-

down menu.

Non cont. tests will run a pre-defined set of tests for various emissions-related

components, for example O2 sensor aging tests.

Pending DTCs are fault codes that have been identified by the ECU but are

deemed not yet critical enough to trigger the MIL.

Vehicle Info can store information including the VIN, calibration versions, and

tracking information. The quantity of info varies wildly between cars.

Permanent DTCs are faults so severe that they cannot be erased with a scan tool,

only by the ECU itself when it has tested and confirmed that the problem has been

repaired.

VC-Scope is able to graph generic OBD-2 Mode 1 data. See the VC-Scope section in

Section 32 for more information.

What's the difference between VCDS and an OBD-II Scan-Tool?

Please see FAQ question 1.10 on our website:

http://www.ross-tech.com/vag-com/vag-com-faq.html

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