Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 325

GD(H4DOTC)-52

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

5. DIAGNOSTIC METHOD

• Abnormality Judgment
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Time Needed for Diagnosis: 512 ms

Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cy-

cles.
• Normality Judgment
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

Judgment Value

Malfunction Criteria

Threshold Value

All of the following conditions are established.

 

Engine coolant temperature – intake air temperature

> 15°C (27°F)

Engine coolant temperature

> 45 °C (113 °F)

Judgment Value

Malfunction Criteria

Threshold Value

When any one of the followings is established.

 

Engine coolant temperature – intake air temperature

≤ 15°C (27°F)

Engine coolant temperature

≤ 45 °C (113 °F)

GD(H4DOTC)-53

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

AF: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 CONDITIONS

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

(A)

Resistance value (kΩ)

(B)

Temperature °C (°F)

 

 

 

 

 

 

 

 

(1)

Connector

(2)

Thermistor element

 

 

Secondary Parameters

Enable Conditions

None

 

EN-02917

(A)

(2)

(1)

(B)

GD(H4DOTC)-54

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

5. DIAGNOSTIC METHOD

• Abnormality Judgment
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 Judgment
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

Judgment Value

Malfunction Criteria

Threshold Value

Output voltage

< 0.464 V

Judgment Value

Malfunction Criteria

Threshold Value

Output voltage

≥ 0.464 V

GD(H4DOTC)-55

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

AG: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 CONDITIONS

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

(A)

Resistance value (kΩ)

(B)

Temperature °C (°F)

 

 

 

 

 

 

 

 

(1)

Connector

(2)

Thermistor element

 

 

Secondary Parameters

Enable Conditions

None

 

EN-02917

(A)

(2)

(1)

(B)