Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 324
GD(H4DOTC)-48
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
< 0.395 V
Judgment Value
Malfunction Criteria
Threshold Value
Output voltage
≥ 0.395 V
GD(H4DOTC)-49
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AD: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 CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(A)
Air
(1)
Air flow sensor
(3)
Resistance value (Ω)
(4)
Intake air temperature °C (°F)
(2)
Intake air temperature sensor
Secondary Parameters
Enable Conditions
None
EN-01767
(3)
(4)
(2)
(1)
(A)
GD(H4DOTC)-50
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
≥ 4.712 V
Judgment Value
Malfunction Criteria
Threshold Value
Output voltage
< 4.712 V
GD(H4DOTC)-51
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AE:DTC P0116 ENGINE COOLANT TEMPERATURE SENSOR 1 CIRCUIT
RANGE/PERFORMANCE
1. OUTLINE OF DIAGNOSIS
Detect the malfunction of the engine coolant temperature sensor characteristics.
When the ignition is ON after the specified period of soaking time has elapsed, compare the engine coolant
temperature with intake air temperature. Judge as NG if the difference between two temperatures is larger
than the predetermined value and the engine coolant temperature becomes the specified value or more.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Perform the diagnosis only once after starting the engine.
(A)
Resistance value (kΩ)
(B)
Temperature °C (°F)
(1)
Connector
(2)
Thermistor element
Secondary Parameters
Enable Conditions
Battery voltage
≥ 10.9 V
Soaking time
≥ 21600 s
Engine coolant temperature at the last engine stop
≥ Value from Map
Map (Models without SI-DRIVE)
Estimate ambient temperature
°C (°F)
–7
(19.4)
8
(46.4)
10
(50)
25
(77)
Engine coolant temperature at the last engine stop
°C (°F)
57
(134.6)
57
(134.6)
57
(134.6)
57
(134.6)
Map (Models with SI-DRIVE)
Estimate ambient temperature
°C (°F)
–7
(19.4)
8
(46.4)
10
(50)
25
(77)
Engine coolant temperature at the last engine stop
°C (°F)
60
(140)
60
(140)
60
(140)
60
(140)
EN-02917
(A)
(2)
(1)
(B)
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