Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service 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)
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