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Home >> Subaru >> 2021 >> Legacy Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (2.5L) (Diagnostics) (4 Of 4) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P24B9: EVAP System Leak Detection Pump Pressure Sensor Circuit Range/Performance >> General Description >> Diagnostic Method

Diagnostic Method

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

JUDGMENT VALUE - DIAGNOSIS 1

Malfunction Criteria Threshold Value
|Pressure sensor output value in leak check valve assembly - Intake manifold pressure (absolute pressure) when ignition switch is ON| 5.9kPa (44.6mmHg, 1.8 inHg) or more
JUDGMENT VALUE - DIAGNOSIS 2

Malfunction Criteria Threshold Value
|Pressure sensor output value in leak check valve assembly - Intake manifold pressure (absolute pressure)| 5.9kPa (44.6mmHg, 1.8 inHg) or more

Time needed for diagnosis 

Diagnosis 1:  320ms

Diagnosis 2:  320ms

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.