Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 340
GD(H4DOTC)-112
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BL:DTC P0246 TURBO/SUPER CHARGER WASTEGATE SOLENOID “A” HIGH
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of the wastegate control solenoid valve.
Judge as NG when the terminal output voltage remains Low or High during outputting the duty signal.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after starting the engine.
(1)
Coil
Secondary Parameters
Enable Conditions
Battery voltage
≥ 10.9 V
Elapsed time after starting the engine
≥ 1 second
EN-01772
(1)
GD(H4DOTC)-113
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
Abnormality Judgment
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Time Needed for Diagnosis: 640 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Normality Judgment
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: Less than 1 second
BM:DTC P0300 RANDOM/MULTIPLE CYLINDER MISFIRE DETECTED
1. OUTLINE OF DIAGNOSIS
NOTE:
For the detection standard, refer to DTC P0301. <Ref. to GD(H4DOTC)-114, DTC P0301 CYLINDER 1 MIS-
FIRE DETECTED, Diagnostic Trouble Code (DTC) Detecting Criteria.>
Judgment Value
Malfunction Criteria
Threshold Value
Terminal output voltage
High
Duty ratio of wastegate control
≥ 25%
Judgment Value
Malfunction Criteria
Threshold Value
Terminal output voltage
Low
GD(H4DOTC)-114
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BN: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 two 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 mis-
fire
The following detecting methods are adopted for these detection.
1) Intermittent misfire: FTP 1.5 times misfire
• 180° Interval Difference Method
• 360° Interval Difference Method (whole range)
• 720° Interval Difference Method (3,000 rpm or more)
2) Misfire every time: FTP 1.5 times misfire, Catalyst damage misfire
• 360° Interval Difference Method
2. ENABLE CONDITIONS
Map 1 (Models without SI-DRIVE)
Map 1 (Models with SI-DRIVE)
Secondary Parameters
Enable Conditions
All secondary parameters enable conditions
≥ 1024 ms
Intake manifold pressure change at 180°CA
< Value of Map 1
Throttle position change during 16 milliseconds
< 14 °
Fuel shut-off function
Not in operation
Fuel level
≥ 9.6 2 (2.54 US gal, 2.11 Imp gal)
Vehicle dynamic control or AT torque control
Not in operation
Evaporative system leak check
Not in operation
Engine speed
550 rpm — 6700 rpm
Intake manifold pressure
≥ Value from Map 2
Battery voltage
≥ 8 V
Fuel parameter determination
Not extremely low volatility
Elapsed time after starting the engine
≥ 0 ms
Engine speed change during 32 milliseconds
< 1000 rpm
rpm
750
1000
1500
2000
2500
3000
3500
4000
kPa (mmHg, inHg)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
rpm
4500
5000
5500
6000
6500
6700
kPa (mmHg, inHg)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
rpm
700
1000
1500
2000
2500
3000
3500
4000
kPa (mmHg, inHg)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
rpm
4500
5000
5500
6000
6500
6700
kPa (mmHg, inHg)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
13.3
(100, 3.9)
GD(H4DOTC)-115
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Map 2 (Models without SI-DRIVE)
• Normal ignition
Barometric pressure (kPa (mmHg, inHg))
66.7
(500.0 , 19.7)
76.6
(575.0 , 22.6)
80
(600.0 , 23.6)
84
(630.0 , 24.8)
86.6
(650.0 , 25.6)
92
(690.0 , 27.2)
100.2
(752.0 , 29.6)
Engine
speed
(rpm)
700
23
(172.4 , 6.8)
23
(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
20.4
(152.8 , 6)
20.4
(152.8 , 6)
20.8
(156.0 , 6.1)
22.7
(170.1 , 6.7)
23.2
(174.4 , 6.9)
23.9
(179.4 , 7.1)
25.1
(188.4 , 7.4)
1500
20.7
(155.4 , 6.1)
20.7
(155.4 , 6.1)
21.5
(161.1 , 6.3)
22.6
(169.4 , 6.7)
23.3
(175.0 , 6.9)
24.4
(183.2 , 7.2)
25.8
(193.7 , 7.6)
2000
20.1
(150.9 , 5.9)
20.1
(150.9 , 5.9)
20.9
(156.7 , 6.2)
22
(165.3 , 6.5)
22.8
(170.8 , 6.7)
23.6
(177.2 , 7)
24.8
(186.1 , 7.3)
2500
20.2
(151.3 , 6)
20.2
(151.3 , 6)
20.9
(156.5 , 6.2)
21.9
(164.4 , 6.5)
22.5
(168.8 , 6.6)
23.2
(174.3 , 6.9)
24.4
(183.1 , 7.2)
3000
21.4
(160.9 , 6.3)
21.4
(160.9 , 6.3)
20.7
(155.6 , 6.1)
21.9
(164.1 , 6.5)
22.6
(169.2 , 6.7)
23.6
(177.3 , 7)
24.3
(182.2 , 7.2)
3500
25.1
(188.3 , 7.4)
25.1
(188.3 , 7.4)
25.8
(193.4 , 7.6)
27.1
(203.5 , 8)
27.8
(208.4 , 8.2)
29.2
(218.8 , 8.6)
29.3
(220.2 , 8.7)
4000
25.7
(192.8 , 7.6)
25.7
(192.8 , 7.6)
26.5
(199.0 , 7.8)
28
(210.2 , 8.3)
28.9
(216.7 , 8.5)
29.4
(220.6 , 8.7)
29.5
(221.2 , 8.7)
4500
25.8
(193.3 , 7.6)
25.8
(193.3 , 7.6)
26.3
(197.1 , 7.8)
27.5
(206.2 , 8.1)
28.7
(215.3 , 8.5)
29.1
(218.3 , 8.6)
29.2
(219.3 , 8.6)
5000
30
(225.3 , 8.9)
30
(225.3 , 8.9)
30.6
(229.6 , 9)
31.3
(234.5 , 9.2)
32.1
(240.7 , 9.5)
33
(247.4 , 9.7)
33.2
(248.8 , 9.8)
5500
33.8
(253.2 , 10)
33.8
(253.2 , 10)
34.2
(256.8 , 10.1)
35.5
(266.4 , 10.5)
36.2
(271.9 , 10.7)
37.2
(279.1 , 11)
37.2
(278.9 , 11)
6000
37.9
(284.4 , 11.2)
37.9
(284.4 , 11.2)
38.2
(286.8 , 11.3)
39.3
(294.5 , 11.6)
40.2
(301.3 , 11.9)
40.8
(306.3 , 12.1)
41.6
(312.0 , 12.3)
6500
42.6
(319.8 , 12.6)
42.6
(319.8 , 12.6)
43.4
(325.4 , 12.8)
44.5
(333.6 , 13.1)
45.5
(341.2 , 13.4)
47
(352.8 , 13.9)
47.2
(354.0 , 13.9)
6700
43.4
(325.2 , 12.8)
43.4
(325.2 , 12.8)
44.1
(330.8 , 13)
45.2
(339.0 , 13.3)
46.2
(346.6 , 13.6)
47.7
(358.2 , 14.1)
47.9
(359.4 , 14.1)
kPa (mmHg, inHg)
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