Subaru Legacy IV (2008 year). Service manual — part 406
GD(H4DOTC)-74
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AO:DTC P0230 FUEL PUMP PRIMARY CIRCUIT
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of fuel pump control unit.
Judge as NG when the NG signal is sent through a diagnostic line coming from the fuel pump control unit.
Fuel pump control unit detects the open or short circuit malfunction for each line, and then sends NG signals
if one of them is found NG.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(1)
Engine control module (ECM)
(3)
Fuel pump
(4)
Battery
(2)
Fuel pump control unit
Secondary Parameters
Enable Conditions
None
EN-01771
E
E
(3)
(4)
(2)
FPC
DI
FP+
FP-
+B
(1)
GD(H4DOTC)-75
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
• Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Time Needed for Diagnosis: 2500 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.
Time Needed for Diagnosis: Less than 1 second
Judgement Value
Malfunction Criteria
Threshold Value
Battery voltage
t 8 V
Elapsed time after starting the engine
t 180000 ms
Fuel pump control
ON
Fuel pump control unit output diagnosis
signal
Low
Fuel level
t 10
2 (2.64 US gal,
2.2 Imp gal)
Judgement Value
Malfunction Criteria
Threshold Value
Battery voltage
t 8 V
Elapsed time after starting the engine
t 180000 ms
Fuel pump control
ON
Fuel pump control unit output diagnosis
signal
High
Fuel level
t 10
2 (2.64 US gal,
2.2 Imp gal)
GD(H4DOTC)-76
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AP:DTC P0244 TURBO/SUPER CHARGER WASTEGATE SOLENOID “A”
RANGE/PERFORMANCE
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of wastegate control solenoid valve function.
Judge as NG when becoming high wastegate pressure.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(1)
Coil
Secondary Parameters
Enable Conditions
None
EN-01772
(1)
GD(H4DOTC)-77
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
• Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Time Needed for Diagnosis: 2000 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• 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: Less than 1 second
Judgement Value
Malfunction Criteria
Threshold Value
Intake manifold pressure
t Value from Map
Map
Pa (kPa (mmHg, inHg))
58.7 kPa
(440 mmHg,
17.3 inHg)
77.3 kPa
(580 mmHg,
22.8 inHg)
89.3 kPa
(670 mmHg,
26.4 inHg)
96 kPa
(720 mmHg,
28.3 inHg)
98.6 kPa
(740 mmHg,
29.1 inHg)
101.3 kPa
(760 mmHg,
29.9 inHg)
Abnormal threshold
(kPa (mmHg, inHg))
143.4 kPa
(1076 mmHg,
42.4 inHg)
172.6 kPa
(1295 mmHg,
51 inHg)
204.5 kPa
(1534 mmHg,
60.4 inHg)
216.2 kPa
(1622 mmHg,
63.9 inHg)
221.3 kPa
(1660 mmHg,
65.4 inHg)
221.3 kPa
(1660 mmHg,
65.4 inHg)
Judgement Value
Malfunction Criteria
Threshold Value
Intake manifold pressure
< Value from Map – 22.4 kPa
(168 mmHg, 6.6 inHg)
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