Subaru LEGACY 2006 Manual page 556

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Diagnostic Trouble Code (DTC) Detecting Criteria
Map 2
Add the following value every 512 milliseconds.
Intake amount of
0 (0)
air (g(oz)/s)
Total value for
–5
warm-up counter
4. GENERAL DRIVING CYCLE
Perform the diagnosis only once at a constant speed of 70 km/h (43 MPH).
5. DIAGNOSTIC METHOD
After establishing the execution conditions, calculate the front oxygen (A/F) sensor lambda deviation cumu-
lative value per 128 milliseconds (Σ |(sglmd
cumulative value (Σ |(ro2sad
mulative value (Σ |(sglmd
nostic value.
Judge as NG when the malfunction criteria below are met. Judge as OK if the criteria below are not met.
Judgment Value
Malfunction Criteria
Σ |(ro2sad )| / Σ |(sglmd
– ro2sad
n n-1
sglmd )|
n-1
Time Needed for Diagnosis: 30 — 55 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
6. DTC CLEAR CONDITION
• When the OK idling cycle is completed 40 times in a row
• When "Clear Memory" is performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
• When the OK driving cycle is completed 3 times in a row
• When "Clear Memory" is performed
8. FAIL SAFE
None
9. ECM OPERATION AT DTC SETTING
• Memorize the freeze frame data. (For test mode $02)
• Memorize the diagnostic value and trouble standard value. (For test mode $06)
3.2 6.4 9.6 12.8
(0.113) (0.226) (0.339) (0.451)
–5 15 31 46
– sglmd
n
– ro2sad )|), and when the front oxygen (A/F) sensor lambda deviation cu-
n n-1
– sglmd )|) becomes higher than the predetermined value, calculate the diag-
n n-1
Threshold Value
– > 1.0
n
GD(H4SO)-119
16 19.2 22.4 25.6
(0.564) (0.677) (0.790) (0.903)
62 77 92 108
)|) and rear oxygen sensor output voltage deviation
n-1
GENERAL DESCRIPTION
28.8 32 35.2
(1.016) (1.129) (1.242)
123 127 127