Subaru Legacy IV (2008 year). Service manual — part 412
GD(H4DOTC)-98
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
• Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more
than the predetermined time.
Time Needed for Diagnosis: 4000 ms + 992 ms + 992 ms + 992 ms
Overflow diagnosis
Perform secondary air system flow abnormality diagnosis using both sides of combination valves secondary
air amount when both are closed.
Judge as secondary air system flow abnormality either if there is excessive secondary air flow amount with
the RH combination valve closed, or if there is excessive secondary air flow amount with the LH combination
valve closed.
• Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
PORL: Both banks all closed pressure
POR: Right bank all closed pressure
POL: Left bank all closed pressure
Time Needed for Diagnosis: 4000 ms + 992 ms + 992 ms + 992 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
• Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more
than the predetermined time.
PORL: Both banks all closed pressure
POR: Right bank all closed pressure
POL: Left bank all closed pressure
Time Needed for Diagnosis: 4000 ms + 992 ms + 992 ms + 992 ms
Judgement Value
Malfunction Criteria
Threshold Value
DTC
Pressure variation value when the LH
combination valve is switched
t Value of Map 5
P2443
Judgement Value
Malfunction Criteria
Threshold Value
DTC
Air flow amount when the right bank is
closed (value from Map 2)
> Value of Map 6
P0411
or
Air flow amount when the left bank is
closed (value from Map 3)
> Value of Map 7
Voltage at PORL measurement – Volt-
age at POR measurement
d 4 V
Voltage at PORL measurement – Volt-
age at POL measurement
d 4 V
Judgement Value
Malfunction Criteria
Threshold Value
DTC
Air flow amount when the right bank is
closed (value from Map 2)
d Value of Map 6
P0411
or
Air flow amount when the left bank is
closed (value from Map 3)
d Value of Map 7
Voltage at PORL measurement – Volt-
age at POR measurement
d 4 V
Voltage at PORL measurement – Volt-
age at POL measurement
d 4 V
GD(H4DOTC)-99
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Map1
Intake air (g (oz)/rev)
0.1
(0)
0.25
(0.01)
0.3
(0.01)
1
(0.04)
Threshold value (V)
13
13
3.25
3.25
Map2
Secondary air
pressure in
the pipe when
both comb.
valve is clos-
ing kPa
(mmHg, inHg)
Secondary air
pressure in
the pipe when
LH comb.
valve is clos-
ing kPa
(mmHg, inHg)
69.3
(520,
20.5)
74.6
(560,
22)
80
(600,
23.6)
85.3
(640,
25.2)
90.6
(680,
26.8)
96
(720,
28.3)
101.3
(760,
29.9)
106.6
(800,
31.5)
112
(840,
33.1)
117.3
(880,
34.6)
122.6
(920,
36.2)
128
(960,
37.8)
133.3
(1000,
39.4)
138.6
(1040,
40.9)
144
(1080,
42.5)
149.3
(1120,
44.1)
69.3
(520, 20.5)
0
200
400
600
800
1000
1200
1400 1600 1800
2000 2200
2400 2400
2400 2400
74.6
(560, 22)
–200
0
200
400
600
800
1000
1200 1400 1600
1800 2000
2200 2400
2400 2400
80
(600, 23.6)
–400
–200
0
200
400
600
800
1000 1200 1400
1600 1800
2000 2200
2400 2400
85.3
(640, 25.2)
–600
–400 –200
0
200
400
600
800
1000 1200
1400 1600
1800 2000
2200 2400
90.6
(680, 26.8)
–800
–600 –400
–200
0
200
400
600
800
1000
1200 1400
1600 1800
2000 2200
96
(720, 28.3)
–1000 –800 –600
–400
–200
0
200
400
600
800
1000 1200
1400 1600
1800 2000
101.3
(760, 29.9)
–1200 –1000 –800
–600
–400
–200
0
200
400
600
800
1000
1200 1400
1600 1800
106.6
(800, 31.5)
–1400 –1200 –1000 –800
–600
–400
–200
0
200
400
600
800
1000 1200
1400 1600
112
(840, 33.1)
–1600 –1400 –1200 –1000 –800
–600
–400
–200
0
200
400
600
800
1000
1200 1400
117.3
(880, 34.6)
–1800 –1600 –1400 –1200 –1000 –800
–600
–400 –200
0
200
400
600
800
1000 1200
122.6
(920, 36.2)
–2000 –1800 –1600 –1400 –1200 –1000 –800
–600 –400 –200
0
200
400
600
800
1000
128
(960, 37.8)
–2200 –2000 –1800 –1600 –1400 –1200 –1000 –800 –600 –400
–200
0
200
400
600
800
133.3
(1000, 39.4)
–2400 –2200 –2000 –1800 –1600 –1400 –1200 –1000 –800 –600
–400 –200
0
200
400
600
138.6
(1040, 40.9)
–2400 –2400 –2200 –2000 –1800 –1600 –1400 –1200 –1000 –800
–600 –400
–200
0
200
400
144
(1080, 42.5)
–2400 –2400 –2400 –2200 –2000 –1800 –1600 –1400 –1200 –1000 –800 –600
–400 –200
0
200
149.3
(1120, 44.1)
–2400 –2400 –2400 –2400 –2200 –2000 –1800 –1600 –1400 –1200 –1000 –800
–600 –400
–200
0
(L/min)
GD(H4DOTC)-100
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Map 3
Secondary air
pressure in
the pipe when
both comb.
valve is clos-
ing kPa
(mmHg, inHg)
Secondary air
pressure in
the pipe when
RH comb.
valve is clos-
ing kPa
(mmHg, inHg)
69.3
(520,
20.5)
74.6
(560,
22)
80
(600,
23.6)
85.3
(640,
25.2)
90.6
(680,
26.8)
96
(720,
28.3)
101.3
(760,
29.9)
106.6
(800,
31.5)
112
(840,
33.1)
117.3
(880,
34.6)
122.6
(920,
36.2)
128
(960,
37.8)
133.3
(1000,
39.4)
138.6
(1040,
40.9)
144
(1080,
42.5)
149.3
(1120,
44.1)
69.3
(520, 20.5)
0
200
400
600
800
1000
1200
1400 1600 1800
2000 2200
2400 2400
2400 2400
74.6
(560, 22)
–200
0
200
400
600
800
1000
1200 1400 1600
1800 2000
2200 2400
2400 2400
80
(600, 23.6)
–400
–200
0
200
400
600
800
1000 1200 1400
1600 1800
2000 2200
2400 2400
85.3
(640, 25.2)
–600
–400 –200
0
200
400
600
800
1000 1200
1400 1600
1800 2000
2200 2400
90.6
(680, 26.8)
–800
–600 –400
–200
0
200
400
600
800
1000
1200 1400
1600 1800
2000 2200
96
(720, 28.3)
–1000 –800 –600
–400
–200
0
200
400
600
800
1000 1200
1400 1600
1800 2000
101.3
(760, 29.9)
–1200 –1000 –800
–600
–400
–200
0
200
400
600
800
1000
1200 1400
1600 1800
106.6
(800, 31.5)
–1400 –1200 –1000 –800
–600
–400
–200
0
200
400
600
800
1000 1200
1400 1600
112
(840, 33.1)
–1600 –1400 –1200 –1000 –800
–600
–400
–200
0
200
400
600
800
1000
1200 1400
117.3
(880, 34.6)
–1800 –1600 –1400 –1200 –1000 –800
–600
–400 –200
0
200
400
600
800
1000 1200
122.6
(920, 36.2)
–2000 –1800 –1600 –1400 –1200 –1000 –800
–600 –400 –200
0
200
400
600
800
1000
128
(960, 37.8)
–2200 –2000 –1800 –1600 –1400 –1200 –1000 –800 –600 –400
–200
0
200
400
600
800
133.3
(1000, 39.4)
–2400 –2200 –2000 –1800 –1600 –1400 –1200 –1000 –800 –600
–400 –200
0
200
400
600
138.6
(1040, 40.9)
–2400 –2400 –2200 –2000 –1800 –1600 –1400 –1200 –1000 –800
–600 –400
–200
0
200
400
144
(1080, 42.5)
–2400 –2400 –2400 –2200 –2000 –1800 –1600 –1400 –1200 –1000 –800 –600
–400 –200
0
200
149.3
(1120, 44.1)
–2400 –2400 –2400 –2400 –2200 –2000 –1800 –1600 –1400 –1200 –1000 –800
–600 –400
–200
0
(L/min)
GD(H4DOTC)-101
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BD:DTC P0411 SECONDARY AIR INJECTION SYSTEM INCORRECT FLOW
DETECTED
1. OUTLINE OF DIAGNOSIS
NOTE:
For the detection standard, refer to DTC P0410. <Ref. to GD(H4DOTC)-94, DTC P0410 SECONDARY AIR
INJECTION SYSTEM, Diagnostic Trouble Code (DTC) Detecting Criteria.>
Map4
Amount of intake air when RH comb.
valve switches (g (oz)/s)
Battery voltage when RH comb. valve
switches (V)
10
(0.35)
15
(0.53)
20
(0.71)
25
(0.88)
26
(0.92)
11
0.025
0.025
0.025
0.005
0
12
0.035
0.035
0.035
0.015
0
13
0.05
0.05
0.05
0.025
0
14
0.05
0.05
0.05
0.025
0
(V)
Map 5
Amount of intake air when LH comb.
valve switches (g (oz)/s)
Battery voltage when LH comb. valve
switches (V)
10
(0.35)
15
(0.53)
20
(0.71)
25
(0.88)
26
(0.92)
11
0.025
0.025
0.025
0.005
0
12
0.035
0.035
0.035
0.015
0
13
0.05
0.05
0.05
0.025
0
14
0.05
0.05
0.05
0.025
0
(V)
Map6
Amount of intake air when P0R is mea-
suring (g (oz)/s)
Battery voltage when P0R measuring (V)
2
(0.07)
25
(0.88)
11.5
345
345
12.5
345
345
13.5
345
345
14.5
390
390
15.5
420
420
(L/min)
Map7
Amount of intake air when P0L is mea-
suring (g (oz)/s)
Battery voltage when P0L measuring (V)
2
(0.07)
25
(0.88)
11.5
345
345
12.5
345
345
13.5
345
345
14.5
390
390
15.5
420
420
(L/min)
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