Subaru Legacy IV (2008 year). Service manual — part 604
GD(H6DO)-36
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Z: DTC P0108 MANIFOLD ABSOLUTE PRESSURE/BAROMETRIC PRESSURE
CIRCUIT HIGH INPUT
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of intake manifold pressure sensor.
Judge as NG if out of specification.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
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: 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
(A)
Output voltage
(B)
Absolute pressure
(1)
Connector
(2)
Terminals
(3)
O-ring
Secondary Parameters
Enable Conditions
None
Judgement Value
Malfunction criteria
Threshold value
Output voltage
t 4.382 V
Judgement Value
Malfunction criteria
Threshold value
Output voltage
< 4.382 V
EN-01765
(B)
(A)
(2)
(3)
(1)
GD(H6DO)-37
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AA:DTC P0111 INTAKE AIR TEMPERATURE SENSOR 1 CIRCUIT RANGE/
PERFORMANCE
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of intake air temperature sensor output property.
Judge as NG when the intake air temperature is not varied whereas it seemed to be varied from the viewpoint
of engine condition.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Perform the diagnosis when the vehicle speed condition is met after warming up from a cold condition.
(A)
Air
(1)
Air flow sensor
(3)
Resistance value (
:)
(4)
Intake air temperature °C (°F)
(2)
Intake air temperature sensor
Secondary Parameters
Enable Conditions
Engine coolant temperature at engine
starting
< 30 °C (86 °F)
Engine coolant temperature
t 95 °C (203 °F)
Battery voltage
t 10.9 V
Continuous time when the vehicle speed
is less than 60 km/h (37.3 MPH
t 600 s
EN-01767
(3)
(4)
(2)
(1)
(A)
GD(H6DO)-38
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
• Abnormality Judgement
Judge as NG when the following conditions are established.
Time Needed for Diagnosis: Less than 1 second
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 following conditions are established.
Time Needed for Diagnosis: Less than 1 second
Judgement Value
Malfunction criteria
Threshold value
Output voltage difference between Max.
and Min.
< 0.02 V(Equivalent to
approximately 0.5°C
(0.9°F) near 25°C)
Judgement Value
Malfunction criteria
Threshold value
Output voltage difference between Max.
and Min.
t 0.02 V
GD(H6DO)-39
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AB:DTC P0112 INTAKE AIR TEMPERATURE SENSOR 1 CIRCUIT LOW
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of the intake air temperature sensor.
Judge as NG if out of specification.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
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: 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
(A)
Air
(1)
Air flow sensor
(3)
Resistance value (
:)
(4)
Intake air temperature °C (°F)
(2)
Intake air temperature sensor
Secondary Parameters
Enable Conditions
None
Judgement Value
Malfunction criteria
Threshold value
Output voltage
< 0.231 V
Judgement Value
Malfunction criteria
Threshold value
Output voltage
t 0.231 V
EN-01767
(3)
(4)
(2)
(1)
(A)
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