Subaru Legacy IV (2008 year). Service manual — part 192
GD(H4SO)-70
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
7. GENERAL DRIVING CYCLE
Always perform diagnosis after 20 seconds have passed since the engine started.
8. 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
Accumulated amount of intake air
t 551043 g (19435.29 oz)
Fuel temperature difference between
Max. and Min.
< 2 °C (35.6 °F)
Judgement Value
Malfunction Criteria
Threshold Value
Fuel temperature difference between
Max. and Min.
t 2 °C (35.6 °F)
GD(H4SO)-71
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AM:DTC P0182 FUEL TEMPERATURE SENSOR “A” CIRCUIT LOW INPUT
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of fuel 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: 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
(A)
Resistance value (
:)
(B)
Fuel temperature °C (°F)
Secondary Parameters
Enable Conditions
None
Judgement Value
Malfunction Criteria
Threshold Value
Output voltage
< 0.343951474 V
Battery voltage
t 10.9 V
Judgement Value
Malfunction Criteria
Threshold Value
Output voltage
t 0.343951474 V
Battery voltage
t 10.9 V
EN-01700
(A)
(B)
GD(H4SO)-72
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AN:DTC P0183 FUEL TEMPERATURE SENSOR “A” CIRCUIT HIGH INPUT
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of fuel 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: 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: Within 1 second
(A)
Resistance value (
:)
(B)
Fuel temperature °C (°F)
Secondary Parameters
Enable Conditions
None
Judgement Value
Malfunction Criteria
Threshold Value
Output voltage
t 4.716 V
Battery voltage
t 10.9 V
Judgement Value
Malfunction Criteria
Threshold Value
Output voltage
< 4.716 V
Battery voltage
t 10.9 V
EN-01700
(A)
(B)
GD(H4SO)-73
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AO:DTC P0196 ENGINE OIL TEMPERATURE SENSOR CIRCUIT RANGE/
PERFORMANCE
1. OUTLINE OF DIAGNOSIS
Detect for abnormal values in the oil temperature sensor output properties.
Judge as NG when the oil temperature does not rise even though the engine is running under a condition
where it should rise.
2. ENABLE CONDITION
3. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after starting the engine.
Secondary Parameters
Enable Conditions
Battery voltage
t 10.9 V
Engine speed
t Value from Map
Map
Engine coolant temperature
°C (°F)
–40
(–40)
–30
(–22)
–20
(–4)
–10
(14)
0
(32)
10
(50)
20
(68)
30
(86)
Engine speed
rpm
500
500
500
500
500
500
500
500
Engine coolant temperature
°C (°F)
40
(104)
50
(122)
60
(140)
70
(158)
80
(176)
90
(194)
100
(212)
110
(230)
Engine speed
rpm
500
500
500
500
500
500
500
500
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