Subaru IMPREZA GD 2007 Series Manual page 1872

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Diagnostic Trouble Code (DTC) Detecting Criteria
AJ:DTC P0181 FUEL TEMPERATURE SENSOR "A" CIRCUIT RANGE/PERFOR-
MANCE
1. OUTLINE OF DIAGNOSIS
Detect faults in the fuel temperature sensor output properties.
Diagnosis is performed in two methods (drift diagnosis and stuck diagnosis). If either is NG, judge as NG. If
both are OK, Judge as OK and clear the NG.
DRIFT DIAGNOSIS
Normally fuel temperature is lower than engine coolant temperature. When the fuel temperature becomes
higher than the engine coolant temperature, the range is considered to be shifted, and judged as NG.
2. COMPONENT DESCRIPTION
(A) Resistance value (Ω)
3. ENABLE CONDITION
Secondary Parameters
None
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(A)
(B) Fuel temperature °C (°F)
Enable Conditions
GD(H4DOTC)-81
GENERAL DESCRIPTION
(B)
EN-01700