Subaru Legacy IV (2008 year). 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