Subaru LEGACY 2006 Manual page 465

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Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
N: DTC P0102 MASS OR VOLUME AIR FLOW CIRCUIT LOW INPUT
1. OUTLINE OF DIAGNOSIS
Detect open or short circuits of the air flow sensor.
Judge as NG if it is out of specification.
2. COMPONENT DESCRIPTION
(1)
(A)
(1) Air flow sensor
(2) Intake air temperature sensor
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
(2)
(3) Voltage (V)
(4) Intake air volume (kg/s)
Enable Conditions
Threshold Value
≤ 0.2 V
GD(H4SO)-28
(3)
(4)
(A) Air
EN-01766