Subaru LEGACY 2006 Manual page 479

asieps_tobira.book 42 ページ ２００９年１０月２６日 月曜日 午前９時１６分
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
U: 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 it is out of specification.
2. COMPONENT DESCRIPTION
(1) Connector
(2) Thermistor element
3. ENABLE CONDITION
Secondary Parameters
None
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
Judge as NG when the continuous time of completing the malfunction criteria below becomes 0.5 seconds
or more. Judge as OK and clear the NG when the malfunction criteria below are not met.
Judgment Value
Malfunction Criteria
Output voltage
Time Needed for Diagnosis: 0.5 seconds
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
6. DTC CLEAR CONDITION
• When the OK idling cycle is completed 40 times in a row
• When "Clear Memory" is performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
• When the OK driving cycle is completed 3 times in a row
• When "Clear Memory" is performed
(1)
(2)
(A) Resistance value (kΩ)
(B) Temperature °C (°F)
Enable Conditions
Threshold Value
< 0.166 V
GD(H4SO)-42
(A)
(B)
EN-02917