Subaru Legacy IV (2008 year). Service manual — part 444
GD(H4DOTC)-226
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
EI: DTC P2419 EVAPORATIVE EMISSION SYSTEM SWITCHING VALVE CONTROL
CIRCUIT LOW
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of the purge control solenoid valve 2.
Judge as NG when the ECM output level differs from the actual terminal level.
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. 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 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
Secondary Parameters
Enable Conditions
None
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(H4DOTC)-227
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
EJ:DTC P2420 EVAPORATIVE EMISSION SYSTEM SWITCHING VALVE CONTROL
CIRCUIT HIGH
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of the purge control solenoid valve 2.
Judge as NG when the ECM output level differs from the actual terminal level.
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. 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 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
Secondary Parameters
Enable Conditions
None
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(H4DOTC)-228
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
EK:DTC P2431 SECONDARY AIR INJECTION SYSTEM AIR FLOW /PRESSURE
SENSOR CIRCUIT RANGE/PERFORMANCE
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of secondary air pressure sensor output property.
Judge as NG when the secondary air pressure sensor output is largely different from the intake manifold
pressure at engine start.
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Perform the diagnosis with ignition switch ON.
4. 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: 328 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: 262 ms
Secondary Parameters
Enable Conditions
Engine speed
< 300 rpm
Vehicle speed
< 1 km/h (0.6 MPH)
After secondary air system stops
t 2976 ms
Judgement Value
Malfunction Criteria
Threshold Value
|Secondary air pipe pressure – Intake
manifold pressure|
t 26.7 kPa (200 mmHg,
7.9 inHg)
|Intake manifold pressure at engine start
– Intake manifold pressure|
< 1.3 kPa (9.99 mmHg,
0.4 inHg)
Judgement Value
Malfunction Criteria
Threshold Value
|Secondary air pipe pressure – Intake
manifold pressure|
< 26.7 kPa (200 mmHg,
7.9 inHg)
GD(H4DOTC)-229
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
EL:DTC P2432 SECONDARY AIR INJECTION SYSTEM AIR FLOW /PRESSURE
SENSOR CIRCUIT LOW
1. OUTLINE OF DIAGNOSIS
Judge as NG if out of specification.
2. ENABLE CONDITIONS
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. 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: 500 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
Secondary Parameters
Enable Conditions
None
Judgement Value
Malfunction Criteria
Threshold Value
Ignition switch
ON
Output voltage
< 0.568 V
Judgement Value
Malfunction Criteria
Threshold Value
Ignition switch
ON
Output voltage
t 0.568 V
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст