Content .. 339 340 341 342 ..

Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 341

GD(H4DOTC)-116

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

• Idling ignition

Barometric pressure (kPa (mmHg, inHg))

66.7

(500.0 , 19.7)

76.6

(575.0 , 22.6)

(600.0 , 23.6)

(630.0 , 24.8)

86.6

(650.0 , 25.6)

(690.0 , 27.2)

100.2

(752.0 , 29.6)

Engine
speed
(rpm)

700

(172.4 , 6.8)

23.7

(177.5 , 7)

25.4

(190.2 , 7.5)

26.7

(200.2 , 7.9)

26.5

(198.6 , 7.8)

27.9

(208.9 , 8.2)

1000

22.3

(167.3 , 6.6)

22.3

(167.3 , 6.6)

(172.6 , 6.8)

24.5

(184.2 , 7.3)

25.7

(192.8 , 7.6)

26.8

(201.0 , 7.9)

(202.3 , 8)

1500

22.3

(167.6 , 6.6)

22.3

(167.6 , 6.6)

24.2

(181.9 , 7.2)

24.8

(185.7 , 7.3)

26.2

(196.7 , 7.7)

26.7

(200.0 , 7.9)

28.2

(211.8 , 8.3)

2000

(164.8 , 6.5)

22.8

(170.9 , 6.7)

23.7

(177.8 , 7)

24.6

(184.7 , 7.3)

25.5

(191.6 , 7.5)

26.5

(198.4 , 7.8)

2500

21.2

(158.9 , 6.3)

21.2

(158.9 , 6.3)

21.9

(164.3 , 6.5)

22.9

(171.7 , 6.8)

23.6

(177.2 , 7)

25.5

(191.6 , 7.5)

25.4

(190.3 , 7.5)

3000

20.9

(156.4 , 6.2)

20.9

(156.4 , 6.2)

26.3

(197.6 , 7.8)

22.6

(169.7 , 6.7)

27.5

(206.2 , 8.1)

24.4

(183.1 , 7.2)

25.3

(189.5 , 7.5)

3500

(225.3 , 8.9)

30.9

(231.8 , 9.1)

(240.4 , 9.5)

32.8

(246.0 , 9.7)

33.7

(252.5 , 9.9)

33.8

(253.7 , 10)

4000

30.7

(230.0 , 9.1)

30.7

(230.0 , 9.1)

31.1

(233.6 , 9.2)

32.3

(242.7 , 9.6)

33.9

(254.5 , 10)

34.7

(260.6 , 10.3)

33.9

(254.4 , 10)

4500

28.4

(213.4 , 8.4)

28.4

(213.4 , 8.4)

(217.2 , 8.6)

29.7

(222.9 , 8.8)

31.7

(237.5 , 9.3)

32.2

(241.8 , 9.5)

31.2

(234.1 , 9.2)

5000

34.4

(257.9 , 10.2)

34.4

(257.9 , 10.2)

34.4

(257.7 , 10.1)

34.9

(261.8 , 10.3)

35.7

(268.1 , 10.6)

36.4

(272.8 , 10.7)

(277.6 , 10.9)

5500

38.2

(286.5 , 11.3)

38.2

(286.5 , 11.3)

38.6

(289.8 , 11.4)

39.8

(298.3 , 11.7)

40.7

(305.1 , 12)

41.4

(310.8 , 12.2)

41.1

(308.3 , 12.1)

6000

40.7

(305.0 , 12)

40.7

(305.0 , 12)

41.1

(308.6 , 12.2)

42.2

(316.8 , 12.5)

44.2

(331.3 , 13)

44.3

(332.3 , 13.1)

44.2

(331.3 , 13)

6500

46.3

(347.3 , 13.7)

46.3

(347.3 , 13.7)

46.6

(349.9 , 13.8)

47.8

(358.4 , 14.1)

48.9

(366.5 , 14.4)

49.7

(372.9 , 14.7)

50.4

(377.9 , 14.9)

6700

(352.7 , 13.9)

47.4

(355.3 , 14)

48.5

(363.8 , 14.3)

49.6

(371.9 , 14.6)

50.4

(378.3 , 14.9)

51.1

(383.3 , 15.1)

kPa (mmHg, inHg)

GD(H4DOTC)-117

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

Map 2 (Models with SI-DRIVE)

• Normal ignition

Barometric pressure (kPa (mmHg, inHg))

66.7

(500, 19.7)

76.6

(575, 22.6)

(600, 23.6)

(630, 24.8)

86.6

(650, 25.6)

(690, 27.2)

100.2

(752, 29.6)

Engine
speed
(rpm)

700

26.7

(200.0 , 7.9)

26.7

(200.0 , 7.9)

27.3

(205.0 , 8.1)

28.4

(213.0 , 8.4)

29.3

(220.0 , 8.7)

29.9

(224.0 , 8.8)

28.8

(216.0 , 8.5)

1000

23.9

(179.0 , 7)

23.9

(179.0 , 7)

24.9

(187.0 , 7.4)

25.5

(191.0 , 7.5)

25.9

(194.0 , 7.6)

27.5

(206.0 , 8.1)

28.6

(214.7 , 8.5)

1500

22.4

(168.0 , 6.6)

22.4

(168.0 , 6.6)

23.3

(175.0 , 6.9)

24.1

(181.0 , 7.1)

24.7

(185.0 , 7.3)

24.8

(186.0 , 7.3)

24.9

(186.9 , 7.4)

2000

23.2

(174.0 , 6.9)

23.2

(174.0 , 6.9)

(180.0 , 7.1)

25.5

(191.0 , 7.5)

26.1

(196.0 , 7.7)

25.6

(192.0 , 7.6)

25.3

(189.5 , 7.5)

2500

23.9

(179.0 , 7)

23.9

(179.0 , 7)

24.5

(184.0 , 7.2)

25.5

(191.0 , 7.5)

(195.0 , 7.7)

25.5

(191.0 , 7.5)

25.1

(188.6 , 7.4)

3000

24.7

(185.0 , 7.3)

24.7

(185.0 , 7.3)

25.3

(190.0 , 7.5)

25.6

(192.0 , 7.6)

26.1

(196.0 , 7.7)

25.9

(194.0 , 7.6)

25.8

(193.3 , 7.6)

3500

29.1

(218.5 , 8.6)

29.1

(218.5 , 8.6)

29.8

(223.5 , 8.8)

29.9

(224.5 , 8.8)

31.3

(234.5 , 9.2)

31.5

(236.0 , 9.3)

29.5

(221.5 , 8.7)

4000

29.2

(219.0 , 8.6)

29.2

(219.0 , 8.6)

29.9

(224.0 , 8.8)

30.5

(229.0 , 9)

30.8

(231.0 , 9.1)

31.7

(238.0 , 9.4)

32.3

(242.2 , 9.5)

4500

29.3

(219.5 , 8.6)

29.3

(219.5 , 8.6)

30.3

(227.5 , 9)

30.9

(231.5 , 9.1)

31.4

(235.5 , 9.3)

32.1

(241.0 , 9.5)

32.6

(244.2 , 9.6)

5000

30.4

(228.1 , 9)

30.4

(228.1 , 9)

30.7

(230.1 , 9.1)

31.7

(238.1 , 9.4)

32.1

(241.1 , 9.5)

32.7

(245.0 , 9.6)

33.1

(248.0 , 9.8)

5500

33.4

(250.6 , 9.9)

33.4

(250.6 , 9.9)

34.2

(256.6 , 10.1)

34.9

(261.6 , 10.3)

35.1

(263.6 , 10.4)

35.7

(268.0 , 10.6)

36.1

(271.0 , 10.7)

6000

37.5

(281.1 , 11.1)

37.5

(281.1 , 11.1)

(285.1 , 11.2)

38.8

(291.1 , 11.5)

39.1

(293.1 , 11.5)

40.3

(302.0 , 11.9)

40.9

(306.9 , 12.1)

6500

42.6

(319.6 , 12.6)

42.6

(319.6 , 12.6)

43.3

(324.6 , 12.8)

43.9

(329.6 , 13)

43.8

(328.6 , 12.9)

44.9

(337.0 , 13.3)

45.6

(341.7 , 13.5)

6700

43.3

(325, 12.8)

43.3

(325, 12.8)

(330, 13)

44.7

(335, 13.2)

44.5

(334, 13.1)

45.6

(342, 13.5)

46.3

(347.1442749,

13.7)

kPa (mmHg, inHg)

GD(H4DOTC)-118

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

• Idling ignition

3. GENERAL DRIVING CYCLE

• If conditions are met, it is possible to detect the misfires from idling to high engine speed. However, in case

any engine load or breakage occurs, perform with the engine at idle.

• Perform the diagnosis continuously.

Barometric pressure (kPa (mmHg, inHg))

66.7

(500, 19.7)

76.6

(575 , 22.6)

(600 , 23.6)

(630 , 24.8)

86.6

(650 , 25.6)

(690 , 27.2)

100.2

(752 , 29.6)

Engine
speed
(rpm)

700

26.7

(200.0 , 7.9)

26.7

(200.0 , 7.9)

27.3

(205.0 , 8.1)

28.4

(213.0 , 8.4)

29.3

(220.0 , 8.7)

29.9

(224.0 , 8.8)

28.8

(216.0 , 8.5)

1000

25.1

(188.0 , 7.4)

25.1

(188.0 , 7.4)

(195.0 , 7.7)

26.9

(202.0 , 8)

(210.0 , 8.3)

28.7

(215.0 , 8.5)

30.4

(228.1 , 9)

1500

22.9

(172.0 , 6.8)

22.9

(172.0 , 6.8)

23.3

(175.0 , 6.9)

23.9

(179.0 , 7)

24.7

(185.0 , 7.3)

24.9

(187.0 , 7.4)

26.7

(200.6 , 7.9)

2000

23.2

(174.0 , 6.9)

23.2

(174.0 , 6.9)

23.7

(178.0 , 7)

24.4

(183.0 , 7.2)

25.1

(188.0 , 7.4)

25.3

(190.0 , 7.5)

27.8

(208.5 , 8.2)

2500

23.2

(174.0 , 6.9)

23.2

(174.0 , 6.9)

23.7

(178.0 , 7)

24.5

(184.0 , 7.2)

24.8

(186.0 , 7.3)

25.3

(190.0 , 7.5)

26.6

(199.7 , 7.9)

3000

24.3

(182.0 , 7.2)

24.3

(182.0 , 7.2)

24.9

(187.0 , 7.4)

25.9

(194.0 , 7.6)

25.9

(194.0 , 7.6)

26.1

(196.0 , 7.7)

26.6

(199.7 , 7.9)

3500

31.7

(237.5 , 9.4)

31.7

(237.5 , 9.4)

31.4

(235.5 , 9.3)

32.6

(244.5 , 9.6)

33.1

(248.5 , 9.8)

34.6

(259.5 , 10.2)

35.2

(264.0 , 10.4)

4000

32.1

(241.0 , 9.5)

32.1

(241.0 , 9.5)

32.3

(242.0 , 9.5)

33.2

(249.0 , 9.8)

33.7

(253.0 , 10)

34.9

(262.0 , 10.3)

(270.0 , 10.6)

4500

32.1

(240.5 , 9.5)

32.1

(240.5 , 9.5)

32.1

(240.5 , 9.5)

(247.5 , 9.7)

33.9

(254.5 , 10)

35.5

(266.5 , 10.5)

35.3

(265.1 , 10.4)

5000

35.5

(266.1 , 10.5)

35.5

(266.1 , 10.5)

34.4

(258.1 , 10.2)

35.3

(265.1 , 10.4)

35.7

(268.1 , 10.6)

37.3

(280.1 , 11)

37.2

(279.2 , 11)

5500

38.1

(285.6 , 11.2)

38.1

(285.6 , 11.2)

37.5

(281.6 , 11.1)

38.5

(288.6 , 11.4)

39.5

(296.6 , 11.7)

40.3

(302.6 , 11.9)

40.7

(305.2 , 12)

6000

41.6

(312.1 , 12.3)

41.6

(312.1 , 12.3)

41.5

(311.1 , 12.2)

42.8

(321.1 , 12.6)

43.5

(326.1 , 12.8)

45.6

(342.1 , 13.5)

45.4

(340.3 , 13.4)

6500

48.6

(364.6 , 14.4)

48.6

(364.6 , 14.4)

49.3

(369.6 , 14.6)

48.6

(364.6 , 14.4)

49.4

(370.6 , 14.6)

49.4

(370.6 , 14.6)

53.4

(400.7 , 15.8)

6700

49.3

(370, 14.6)

49.3

(370, 14.6)

(375, 14.8)

49.3

(370, 14.6)

50.1

(376, 14.8)

50.1

(376, 14.8)

54.1

(406.1514536,

16)

kPa (mmHg, inHg)

GD(H4DOTC)-119

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

4. DIAGNOSTIC METHOD

When a misfire occurs, the engine speed will decrease and the crankshaft position speed will change. Cal-

culate the interval difference value (diagnostic value) from crankshaft position speed by the following formu-

la, and judge whether a misfire is occurring or not comparing the calculated result with judgment value. Count

the number of misfires, if the misfire ratio is higher during 1000 revs. or 200 revs., judge corresponding cyl-

inders as NG.

As shown in the following figure, pick a cylinder as the standard and name it omg 0. And the former crank-

shaft position speed is named omg 1, the second former crankshaft position speed is named omg 2, the third

is named omg 3, etc.

Diagnostic value calculation
(Calculate from angle speed) →

Misfire detection every single ignition
(Compare diagnostic value with judgment value) →

NG judgment (Misfire occurrence judg-
ment required by the law) (Compare
number of misfire with judgment value)

• 180° Interval Difference Method
• 360° Interval Difference Method
• 720° Interval Difference Method

• FTP 1.5 times misfire NG judgment
• Catalyst damage misfire NG judgment

(A)

Ignition order

(B)

Crankshaft position speed

EN-01774

(A)

(B)

omg0

omg1

omg2

omg3

omg4

omg5

omg6

omg7

Content .. 339 340 341 342 ..