D439E Service Manual 5. Service Tool
304
In-USE Performance Tracking
This data is used to support possible regulatory requirements for In-use Performance Tracking. Manufacturers
are required to implement software algorithms that track in-use performance for each of the flowing
component:
z Catalyst bank 1
z Catalyst bank 2
z Primary oxygen sensor bank 1
z Primary oxygen sensor bank 2
z Evaporative 0.020” leak detecting system
z EGR system
z Secondary air system
The numerator for each component or system shall track the number of time that all conditions necessary for
a specific monitor to detect a malfunction have been encountered. The denominator for each component or
system shall track the number of times that the vehicle has been operated in the specified conditions. These
conditions are specified for each monitored component or system.
The ignition counter shall track the number of times that the engine has been started. All data items of the In-
use Performance Tracking record have to be reported in the order as shown.
<Figure 10: In-USE Performance Tracking >
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