Diagnostic Method

WARNING: This page is about a different variant/trim than selected.

Fuel system is diagnosed by comparing the target air fuel ratio calculated by ECM with the actual air fuel ratio measured by sensor.

Abnormality Judgment

Compare the diagnostic value (fsobd) with the threshold value, and if a condition meeting the malfunction criteria below continues for 10 s x 5 time(s) or more, judge that there is a fault in the fuel system.

JUDGMENT VALUE

Malfunction Criteria	Threshold Value
fsobd = (sglmd - tglmda) + faf + flaf	< Value of Map 2
In this case: sglmd = measured lambda
tglmda = target lambda
faf = main feedback compensation coefficient (every 64 milliseconds)
flaf = main feedback learning compensation coefficient

MAP 2

Amount of air (g (oz)/s)	0 (0)	3.2 (0.11)	6.4 (0.23)	9.6 (0.34)	12.8 (0.45)	16 (0.56)	19.2 (0.68)
fsobdL1 (%)	0.6	0.6	0.668	0.735	0.735	0.735	0.735

Time Needed for Diagnosis: 10 s x 5 time(s)

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

Normality Judgment

Judge as OK if the status that the criteria below are met continues for 10 seconds.

JUDGMENT VALUE

Malfunction Criteria	Threshold Value
fsobd = (sglmd - tglmda) + faf + flaf	≤ 0.85

Time Needed for Diagnosis: 10 s