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2.23.2. OBD mode
With OBD selected, the following settings and parameters can be configured and viewed:
Fig. 53 Configuration of OBD adaptation
The map of OBD target corrections
– Press the Open button to display the configuration
window, in which the resulting OBD corrections for each bank are displayed as a map with rpm
and negative pressure axes. Map content is also automatically refreshed during controller
autocalibration.
The minimum engine temperature
– Engine temperature threshold (read through OBD2/EOBD
or emulated by the controller), above which it is allowed to correct the gas dose.
Fig. 54 OBD target correction map
Próg włączenia
– Wartość poszerzająca zakres akceptowanej docelowej korekcji
Switch on threshold
– A value that extends the range of acceptable resultant target correction.
For example, a threshold of 4% with target correction of 0% (on the map) means the range of -
4% +4% of the OBD resulting correction, within which the adaptation procedure will not correct
gas doses.
LTFT max.
– a limit, maximum trim value that the OBD autoadaptation can make.
Acquire OBD correction map
– Activation results in automatic filling of target correction maps
when driving on petrol.
Reversed STFT
– In conventional fuel dose control systems, OBD correction values are positive
for the lean mixture and negative for the rich mixture. The option should be active in vehicles, in
which the relation between the mixture and OBD correction positive/negative status is reversed.