Subaru Legacy IV (2008 year). Service manual — part 195
GD(H4SO)-82
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
180° Interval Difference Method
360° Interval Difference Method
Diagnostic value
domg 180 = (omg 1 – omg 0) – (omg 5 – omg 1)/4
Judge as a misfire in the following cases.
• domg 180 > judgment value of positive side
• domg 180
d judgment value of negative side
(Judgement value before 180° CA)
Diagnostic value
domg 360 = (omg 1 – omg 0) – (omg 3 – omg 2)
Misfire judgment
domg 360 > Judgement value
o Judge as misfire
Judged as misfire.
Threshold valve (positive number)
Threshold valve (negative number)
domg180
domg180
EN-02877
Judged as misfire.
Threshold valve
domg360
domg360
EN-03273
GD(H4SO)-83
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
720° Interval Difference Method
• FTP 1.5 times misfire (Misfire occurrence level which influences exhaust gas)
• Abnormality Judgement
Time Needed for Diagnosis: 1000 engine revs.
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
• Normality Judgement
Time Needed for Diagnosis: 1000 engine revs.
Diagnostic value
domg 720 = (omg 1 – omg 0) – (omg 5 – omg 4)
Misfire judgment
domg 720 > Judgement value
o Judge as misfire
Judgement Value (Judge that malfunction occurs when the misfire ratio is high in 1000 engine revs.)
Malfunction Criteria
Threshold Value
FTP emission judgment value
t 18 × 100/2000% in
1000 revs. (U5 model)
t 20 × 100/2000% in
1000 revs.
(Except for U5 model)
Judgement Value
Malfunction Criteria
Threshold Value
FTP emission judgment value
< 18 × 100/2000% in
1000 revs. (U5 model)
< 20 × 100/2000% in
1000 revs.
(Except for U5 model)
Judged as misfire.
Threshold valve
domg720
domg720
EN-03274
GD(H4SO)-84
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
• Catalyst damage misfire (Misfire occurrence level damaging catalyst)
• Abnormality Judgement
Map 3
Time Needed for Diagnosis: 200 engine revs.
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• Normality Judgement
Time Needed for Diagnosis: 200 engine revs.
Judgement Value
Malfunction Criteria
Threshold Value
Catalyst damage misfire judgment value
t Value of Map 3
U5 MODEL
Intake
air
(g(oz)/rev)
0.16 (0.01)
0.28 (0.01)
0.4 (0.01)
0.52 (0.02)
0.64 (0.02)
0.76 (0.03)
0.92 (0.03)
1.1 (0.04)
Engine
speed
(rpm)
700
100
100
100
100
90
80
64
48
1000
100
100
100
100
90
80
52
24
1500
100
100
90
80
69
57
39
22
2000
80
80
80
80
62
44
33
21
2500
67
67
58
50
40
31
25
20
3000
57
57
49
40
30
20
20
20
3500
44
44
34
24
20
20
20
20
4000
36
36
28
20
20
20
20
20
4500
27
27
20
20
20
20
20
20
5000
20
20
20
20
20
20
20
20
5500
20
20
20
20
20
20
20
20
6000
20
20
20
20
20
20
20
20
6300
20
20
20
20
20
20
20
20
EXCEPT FOR U5 MODEL
Intake
air
(g(oz)/rev)
0.16 (0.01)
0.28 (0.01)
0.4 (0.01)
0.52 (0.02)
0.64 (0.02)
0.76 (0.03)
0.92 (0.03)
1.1 (0.04)
Engine
speed
(rpm)
700
100
100
100
100
90
80
64
48
1000
100
100
100
100
90
80
63
44
1500
100
100
90
80
73
67
54
40
2000
80
80
80
80
68
57
51
44
2500
80
80
73
67
62
57
51
44
3000
67
67
62
57
51
44
44
44
3500
67
67
56
44
40
36
34
31
4000
57
57
44
31
24
20
20
20
4500
44
44
33
31
20
20
20
20
5000
44
44
38
31
20
20
20
20
5500
36
36
31
27
20
20
20
20
6000
20
20
20
20
20
20
20
20
6300
20
20
20
20
20
20
20
20
Judgement Value
Malfunction Criteria
Threshold Value
Catalyst damage misfire judgment value
< Value of Map 3
GD(H4SO)-85
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AU:DTC P0302 CYLINDER 2 MISFIRE DETECTED
1. OUTLINE OF DIAGNOSIS
NOTE:
For the detection standard, refer to DTC P0301. <Ref. to GD(H4SO)-79, DTC P0301 CYLINDER 1 MISFIRE
DETECTED, Diagnostic Trouble Code (DTC) Detecting Criteria.>
AV:DTC P0303 CYLINDER 3 MISFIRE DETECTED
1. OUTLINE OF DIAGNOSIS
NOTE:
For the detection standard, refer to DTC P0301. <Ref. to GD(H4SO)-79, DTC P0301 CYLINDER 1 MISFIRE
DETECTED, Diagnostic Trouble Code (DTC) Detecting Criteria.>
AW:DTC P0304 CYLINDER 4 MISFIRE DETECTED
1. OUTLINE OF DIAGNOSIS
NOTE:
For the detection standard, refer to DTC P0301. <Ref. to GD(H4SO)-79, DTC P0301 CYLINDER 1 MISFIRE
DETECTED, Diagnostic Trouble Code (DTC) Detecting Criteria.>
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