Diagnostic Method
Calculate faf difference and the k value difference every 32ms x 4. Calculate the diagnosis value after calculating 820 time.
- Abnormality Judgment
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgment Value
MALFUNCTION CRITERIA AND THRESHOLD VALUE REFERENCEMalfunction Criteria Threshold Value parafca = td2faf/td2lmd
where,
td2faf (N) = td2faf (n-1) + |d2faf (n)|
td2lmd (N) = td2lmd (n-1) + |d2lmd (n)|
add up to 32 ms x 4 x 820 time.
d2faf (n) = (faf (n) - faf (n-1)) - (faf (n-1) - faf (n-2))
d2lmd (n) = (lmd (n) - lmd (n-1)) - (lmd (n-1) - lmd (n-2))
faf = main feedback compensation coefficient every 128 milliseconds
lmd = output lambda every 128 milliseconds> 0.2 Time Needed for Diagnosis: 32 ms x 4 x 820 time
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgment
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Judgment Value
MALFUNCTION CRITERIA AND THRESHOLD VALUE REFERENCEMalfunction Criteria Threshold Value parafca = td2faf/td2lmd
where,
td2faf (N) = td2faf (n-1) + |d2faf (n)|
td2lmd (N) = td2lmd (n-1) + |d2lmd (n)|
add up to 32 ms x 4 x 820 time.
d2faf (n) = (faf (n) - faf (n-1)) - (faf (n-1) - faf (n-2))
d2lmd (n) = (lmd (n) - lmd (n-1)) - (lmd (n-1) - lmd (n-2))
faf = main feedback compensation coefficient every 128 milliseconds
lmd = output lambda every 128 milliseconds≤ 0.2 Time Needed for Diagnosis: 32 ms x 4 x 820 time