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Home >> Subaru >> 2006 >> Legacy GT spec.B >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0638 Throttle Actuator Control Range/Performance (Bank 1) >> Diagnostic Method

Diagnostic Method

Judge as OK and clear the NG when the malfunction criteria below are met.

Judgment Value 

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Difference between target opening angle and actual opening angle 3.5° or less
Output duty to drive circuit 95% or less

Time Needed for Diagnosis: 

Details of Judgment Value 

Fig 1: Target Opening And Actual Opening Angle Judgment Value Graph
G05018361

Details of Judgment (The actual opening angle ± target opening angle is always 1000 milliseconds) 

Fig 2: Target Opening And Actual Opening Angle Judgment Value Graph
G05018362

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