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)