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Home >> Subaru >> 2006 >> Baja Turbo, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Diagnostic Trouble Code (DTC) Detecting Criteria (H4SO)) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0502 - Vehicle Speed Sensor Circuit Low Input - >> Diagnostic Method

Diagnostic Method

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Judge NG when the time of completing the malfunction criteria below becomes more than time needed for diagnosis. Judge OK when the vehicle speed is more than 4 km/h (2.5 MPH) and less than 224 km/h (140 MPH).

Judgment Value 

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Low side diagnosis (1)   
Cumulative time when the malfunction criteria below are completed ≥ 20 seconds
Idle switch OFF
Injector pulse ≥ 2.5 milliseconds
Engine speed ≥ 2800 rpm
Neutral switch OFF
Vehicle speed signals count (353 ms) < 1

Time Needed for Diagnosis: 

Low side 20 seconds

Malfunction Indicator Light Illumination  : Illuminates as soon as malfunction occurs.