DTC P24B9: EVAP System Leak Detection Pump Pressure Sensor Circuit Range/Performance: Notes
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DTC detecting condition:
Detected when two consecutive driving cycles with fault occur.
NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Refer to ENGINE (DIAGNOSTICS) (H4DO)>Basic Diagnostic Procedure>PROCEDURE .
- CHECK DTC
.
- Turn the ignition switch to ON.
- Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Refer to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC)
.
Is DTC other than P24B9 displayed? (Current malfunction)
Yes : Check the appropriate DTC using the "Diagnostic Trouble Code (DTC)". Refer to ENGINE (DIAGNOSTICS) (H4DO)>Diagnostic Trouble Code (DTC)>LIST .
No : Go to 2.
- CHECK DATA MONITOR
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- Turn the ignition switch to ON (engine OFF).
- Using the Subaru Select Monitor, read the values of [EVAP System Vapor Pressure] and [Intake Manifold Absolute Pressure] to compare with actual atmospheric pressure.NOTE: For detailed operation procedures, refer to "Common (Diagnostics)". Refer to COMMON (DIAG)>DATA MONITOR .
Is the difference with the actual atmospheric pressure 2.53 [kPa] (18.98 mmHg, 0.75 inHg, 0.37 psi) or more?
Yes : Replace the part that showed larger deviation from the actual atmospheric pressure than the other.
- If deviations in value for [Absolute EVAP Sys. Pressure] is larger: Replace the leak check valve assembly. Refer to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DO)>LEAK CHECK VALVE ASSEMBLY .
- If deviations in value for [Mani. Absolute Pressure] is larger: Replace the manifold absolute pressure sensor. Refer to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>MANIFOLD ABSOLUTE PRESSURE SENSOR .
No : Even if DTC is detected, the circuit has returned to a normal condition at this time.
Reproduce the failure, and then perform the diagnosis again.
NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.