Subaru Legacy IV (2008 year). Service manual - part 396

GD(H4DOTC)-34

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

Q: 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

< 0.230975449 V

Judgement Value

Malfunction Criteria

Threshold Value

Output voltage

t 0.230975449 V

EN-01767

(3)

(4)

(2)

(1)

(A)

GD(H4DOTC)-35

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

R: DTC P0113 INTAKE AIR TEMPERATURE SENSOR 1 CIRCUIT HIGH

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

t 4.716 V

Judgement Value

Malfunction Criteria

Threshold Value

Output voltage

< 4.716 V

EN-01767

(3)

(4)

(2)

(1)

(A)

GD(H4DOTC)-36

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

S: DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT LOW

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of the engine coolant 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)

Resistance value (k

:)

(B)

Temperature °C (°F)

 

 

(1)

Connector

(2)

Thermistor element

Secondary Parameters

Enable Conditions

None

 

Judgement Value

Malfunction Criteria

Threshold Value

Output voltage

< 0.264738528 V

Judgement Value

Malfunction Criteria

Threshold Value

Output voltage

t 0.264738528 V

EN-02917

(A)

(2)

(1)

(B)

GD(H4DOTC)-37

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

T: DTC P0118 ENGINE COOLANT TEMPERATURE CIRCUIT HIGH

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of the engine coolant 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)

Resistance value (k

:)

(B)

Temperature °C (°F)

 

 

(1)

Connector

(2)

Thermistor element

Secondary Parameters

Enable Conditions

None

 

Judgement Value

Malfunction Criteria

Threshold Value

Output voltage

t 4.716 V

Judgement Value

Malfunction Criteria

Threshold Value

Output voltage

< 4.716 V

EN-02917

(A)

(2)

(1)

(B)