88B-5
V1
MR-453-X79-88B000$010.mif
MULTIPLEXING
Fault finding – Introduction
88B
Interpreting test result charts
On the Faults tab, the computers are organised into the following groups:
– Not detected if the computer failed to respond to the tool's identification request.
– Not recognised if the computer is detected but cannot be identified from its response.
On the Information tab, the computers are organised and listed as follows:
– Cannot support fault finding, if the computer cannot support fault finding with the tool and therefore was not
queried.
– Valid if the computer responded correctly to the tool's request.
If the Proceed icon in the bottom right-hand corner is selected, a new screen will appear with the following tab:
Under the Results tab the computers are organised into the following groups:
– Faulty if the computer is known and has a non-zero number of faults.
– OK if the computer was detected, recognised and has no faults.
– Not recognised if the computer was detected but could not be identified from its response.
– Not detected if the computer can support fault finding but failed to respond.
FUNCTION TESTING
The function test can be accessed by clicking on the List of functions icon.
– The vehicle function tests screen resembles the multiplex network test screen with a diagram of the network layout
if this is known and displayed.
– The Function tab displays the different computers involved in the functions whether distributed or not over the
various computers.
Examples:
•Air conditioning: UCH, INJ, and CLIM.
• Access - Safety: UCH and INJ
•Wiping: UCH
•Lighting: UCH
– The Info tab displays the other possible functions found on the vehicle concerned.
– Selecting a function from the list of functions enables computers not involved in this function to be shaded,
thus indicating the computers involved in this function.
– The Fault finding button runs fault finding on the function selected from the list.
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