DTC P24B9: EVAP System Leak Detection Pump Pressure Sensor Circuit Range/Performance: Notes
1.-
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. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE
.
- CHECK DTC
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- Turn the ignition switch to ON.
- Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC other than P24B9 displayed? (Current malfunction)
Check the appropriate DTC using the "Diagnostic Trouble Code (DTC)". Ref. to ENGINE (DIAGNOSTICS) (H4DO)>DIAGNOSTIC TROUBLE CODE (DTC) .
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)". Ref. to COMMON (DIAG)>DATA MONITOR .Is the difference with the actual atmospheric pressure 2.53 kPa (18.98 mmHg, 0.75 inHg, 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. Ref. 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. Ref. 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.