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This article describes a technique which allows a vehicle technician terminal to retrieve data that is NOT EQUAL or OUT OF RANGE of given data while being checked for a fault.
English (United States)
This text was extracted from a PDF file.
This is the abbreviated version, containing approximately
53% of the total text.
Page 1 of 2
DATA Retrieval From a Vehicle Attached to a Technician Terminal
This article describes a technique which allows a vehicle technician terminal
to retrieve data that is NOT EQUAL or OUT OF RANGE of given data while
being checked for a fault.
Typically when a vehicle is being diagnosed by a technician terminal, it can
request data from the vehicle via the assembly line diagnostic link (ALDL). The
data that is returned from the vehicle can be all the data available which then
must be sifted through for the desired data. Alternatively, the data may also be
requested and returned only if it is equal to a given value.
The technique disclosed herein allows the data to be returned if it is NOT
EQUAL to a given value or the data will be returned if it is OUT OF RANGE of
the given value. With the decision being made in the ALDL attachment, the host
processor would not have to perform this operation.
In the first example, if the given value is 38, all data streams would be
returned when the specified location was not equal to 38. The NOT EQUAL
command could have the second and third set of parameters and then all
parameters must be NOT EQUAL in order to return data. The BC and SB
parameters would increase to show the additional parameters.
The second example would return the data stream if a specified location(s)
was lower than 36 or higher than 40. These two values being checked are within
tolerance and no data would be returned if the value was within this range. The
first set of parameters check for the data being lower than 'DO' and if that is true,
the data will be returned. The second s...