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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. 26 Exhaust Sulphur Smell >> Diagnostic procedure

Diagnostic procedure

WARNING: This page is about a different variant/trim than selected.
DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 Are any driveability or exhaust smoke concerns present? Yes Go to the appropriate flow chart.
No Go to the next step.
2 Inspect for the following:
  • Electrical connections
  • Vacuum lines
  • Fuel quality

Are all items normal?		 Yes Go to the next step.
No Service if necessary.
Repeat Step 2.
3 Connect the WDS or equivalent to the DLC-2.
Turn the ignition switch to the ON position (Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?		 Yes DTC is displayed: 
Go to the appropriate DTC test.
No No DTC is displayed: 
Go to the next step.
4 Access and monitor FUEL_PRES PID.
Is the FUEL_PRES PID value within the specified?
(See USING THE WDS OR EQUIVALENT ).		 Yes Go to Step 8.
No Go to the next step.
5 Is vehicle accelerate performance normally? Yes Go to the next step.
No Go to Step 7.
6 Inspect the fuel pressure sensor.
(See FUEL PRESSURE SENSOR INSPECTION ).
Is the fuel pressure sensor normal?		 Yes Go to Step 8.
No Go to the next step.
7 Replace the high pressure fuel pump.
Monitor FUEL_PRES PID.
Is the FUEL_PRES PID value within the specified?
(See USING THE WDS OR EQUIVALENT ).		 Yes Troubleshooting is completed.
Go to Step 9.
No Go to the next step.
8 Inspect the charcoal canister for fuel saturation.
Is excess amount of liquid fuel present in canister?		 Yes Replace the charcoal canister.
No Inspect the fuel tank vent system.
If fuel tank vent system is normal, suggest trying a different brand since sulfur content can vary in different fuels.
If fuel tank vent system is not normal, repair or replace the malfunctioning parts.
9 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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