Subaru Legacy IV (2008 year). Service manual — part 215
GD(H4SO)-162
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 10.9 V
Elapsed time after starting the engine
t 1 second
Terminal output voltage when ECM out-
puts OFF signal
Low
Judgement Value
Malfunction Criteria
Threshold Value
Battery voltage
t 10.9 V
Elapsed time after starting the engine
t 1 second
Terminal output voltage when ECM out-
puts OFF signal
High
GD(H4SO)-163
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CM:DTC P1420 FUEL TANK PRESSURE CONTROL SOL. VALVE CIRCUIT HIGH
1. OUTLINE OF DIAGNOSIS
Detect the open/short circuit of pressure control solenoid valve.
Judge as NG when ECM output level is different from actual terminal level.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Always perform the diagnosis after starting the engine.
(A)
Barometric pressure
(B)
Shut-off valve
(C)
To fuel tank
(1)
Filter
(3)
Connector terminal
(5)
Valve
(2)
Coil
(4)
Diaphragm
Secondary Parameters
Enable Conditions
None
EN-01759
(1)
(2)
(3)
(4)
(5)
(A)
(B)
(C)
GD(H4SO)-164
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 10.9 V
Elapsed time after starting the engine
t 1 second
Terminal output voltage when ECM out-
puts ON signal
High
Judgement Value
Malfunction Criteria
Threshold Value
Battery voltage
t 10.9 V
Elapsed time after starting the engine
t 1 second
Terminal output voltage when ECM out-
puts ON signal
Low
GD(H4SO)-165
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CN:DTC P1443 VENT CONTROL SOLENOID VALVE FUNCTION PROBLEM
1. OUTLINE OF DIAGNOSIS
Detect the abnormal function (stuck closed) of the drain valve.
Judge as NG when fuel tank pressure is low.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(1)
Bobbin
(8)
Magnetic plate
(14)
Retainer
(2)
Coil
(9)
Shaft
(15)
Diaphragm
(3)
Diode
(10)
Plate
(16)
Movable core
(4)
Stator core
(11)
Valve
(17)
Spring
(5)
End plate
(12)
Housing
(18)
Cover
(6)
Body
(13)
Filter
(19)
O-ring
(7)
Yoke
Secondary Parameters
Enable Conditions
Drain valve
Open
Battery voltage
t 10.9 V
Barometric pressure
t 75 kPa (563 mmHg,
22.2 inHg)
Tank pressure when starter is OFF
o
ON
–0.4 kPa (–3.2 mmHg,
–0.1 inHg)
and
1.4 kPa (10.7 mmHg,
0.4 inHg)
EN-02294
( 1 )
( 2 )
( 3 )
( 4 )
( 5 )
( 6 )
( 7 )
( 8 )
( 9 )
(10)
(11)
(12)
(13)
(17)
(14)
(15)
(16)
(18)
(19)
(19)
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