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Home >> Mazda >> 2006 >> 6 s, 4D Wagon, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Symptom Troubleshooting [Engine Control System L3 With TC)) >> No. 20 Fuel Odor (In Engine Compartment) >> Diagnostic procedure

Diagnostic procedure

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DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 Visually inspect fuel leakage at fuel line.
Is there any fuel leakage?		 Yes Service if necessary.
No Go to the next step.
2 Inspect the vacuum hose routine.
(See VACUUM HOSE ROUTING DIAGRAM ).
Are vacuum hoses routines properly?		 Yes Go to the next step.
No Reconnect the vacuum hose.
3 Perform the Evaporative Emission (EVAP)
System Leak Inspection.
(See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK INSPECTION ).
Is there any problem found?		 Yes Repair or replace suspected part according to the inspection results.
No Go to the next step.
4 Inspect the airflow of purge solenoid valve.
(See AIRFLOW INSPECTION ).
Is the purge solenoid airflow properly?		 Yes Go to the next step.
No Replace the purge solenoid valve.
5 Connect the WDS or equivalent to the DLC-2.
Access the FUEL_PRES PID.
Monitor the FUEL_PRES PID while idle and race the engine.
Is the FUEL_PRES PID indicate 15 MPa {153 kgf/cm 2  , 2175 psi} or less  ?		 Yes Inspect the charcoal canister for fuel saturation. If excess amount of liquid fuel is present, replace the charcoal canister.
No Inspect the fuel pressure sensor and the high pressure fuel pump.
(See FUEL PRESSURE SENSOR INSPECTION ).
(See HIGH PRESSURE FUEL PUMP INSPECTION ).
6 Verify test results.
  • If normal, return to the diagnostic index to service any additional symptoms.
  • If a malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform the repair or diagnosis.
    • If the vehicle is repaired, troubleshooting is completed.
    • If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.
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