Subaru 2006 Legacy, Manual

Page: 1321 / 4302

GD(H4SO U5)-95
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AT:DTC P0301 CYLINDER 1 MISFIRE DETECTED
1. OUTLINE OF DIAGNOSIS
Detect the presence of misfire occurrence. (Revolution fluctuation method)
Monitoring Misfire which influences exhaust deterioration (1.5 times of FTP) and catalyst damage is made
obligatory by the law. Misfire affecting these two has three patterns below.
• Intermittent misfire (The same cylinder misfires in random, or different cylinders misfire in random.): FTP
1.5 times misfire
• Every time misfire (The same cylinder misfires every time.): FTP 1.5 times misfire, Catalyst damage misfire
The following detecting methods are adopted for these detection.
1) Intermittent misfire: FTP 1.5 times misfire
• 180° Interval Difference Method (MT: 1,800 rpm or less; AT: None)
• 360° Interval Difference Method (whole range)
• 720° Interval Difference Method (3,000 rpm or less)
2) Misfire every time: FTP 1.5 times misfire, Catalyst damage misfire
• 360° Interval Difference Method
2. ENABLE CONDITION
Map 3
Secondary Parameters Enable Conditions
All secondary parameters enable condi-
tions 1 second or more
Intake manifold pressure change during
0.5 engine revs. < 13.3 kPa (100
mmHg, 3.94 inHg)
Throttle position change during 16 milli-
seconds < 21°
Fuel shut-off function Not in operation
Atmospheric pressure
≥
75.0 kPa (563
mmHg, 22.2 inHg)
Fuel level
≥
9.6
2
(2.54 US gal,
2.11 Imp gal)
AT torque control Not in operation
Evaporative system leak check Not in operation
Engine speed 460 — 6400 rpm
Intake manifold pressure > Value of Map 3
Battery voltage
≥
8 V
Fuel parameter determination Not extremely low vol-
atility
MT (Vehicle speed < 64.4km/h (40 MPH))
rpm 650 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6400
kPa
(mmHg,
inHg)
25.6
(192,
7.56)
23.1
(173,
6.82)
20.0
(150,
5.91)
20.0
(150,
5.91)
20.0
(150,
5.91)
21.6
(162,
6.38)
26.4
(198.,
7.80)
28.0
(210,
8.27)
29.5
(221,
8.71)
32.4
(243,
9.57)
36.4
(273,
10.75)
39.9
(299,
11.78)
44.5
(324,
13.14)
MT (Vehicle speed
≥
64.4km/h (40 MPH))
rpm 650 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6400
kPa
(mmHg,
inHg)
31.6
(237,
9.33)
31.6
(237,
9.33)
31.6
(237,
9.33)
31.1
(233,
9.19)
31.3
(235,
9.24)
33.1
(248,
9.78)
33.9
(254,
10.01)
28.8
(216,
8.51)
30.1
(226,
8.89)
33.3
(250,
9.84)
36.9
(277,
10.90)
40.1
(301,
11.84)
44.5
(324,
13.14)
AT
rpm 700 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6400
kPa
(mmHg,
inHg)
25.6
(192,
7.56)
24.4
(183,
7.21)
22.0
(165,
6.50)
22.4
(168,
6.62)
22.8
(171,
6.73)
23.9
(179,
7.06)
29.9
(224,
8.83)
31.3
(235,
9.24)
29.9
(244,
8.83)
35.6
(267,
10.51)
39.3
(295,
11.61)
43.3
(325,
12.79)
44.5
(334,
13.14)
asieps_tobira.book 95 ページ ２００９年１０月２６日 月曜日 午前９時１６分