Dtc P0093 - Mazda 6 Workshop Manual

DTC P0093

DTC P0093 Fuel system leak detection
• The PCM monitors the fuel pressure in the common rail from the fuel pressure sensor while the engine
running. If the fuel pressure is lower after the fuel injection than the preprogrammed criteria, the PCM
determines fuel system leakage.
DETECTION
Diagnostic support note
CONDITION
• The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
• Fuel leakage or clogged fuel line
• Suction control valve malfunction
POSSIBLE
• Fuel pressure sensor malfunction
CAUSE
• Fuel injector malfunction
• PCM malfunction
Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has FREEZE FRAME DATA been recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Verify related Service Information availability.
• Is any related repair information available?
3 VERIFY CURRENT SIGNAL STATUS: IS
CONCERN INTERMITTENT OR CONSTANT?
• Connect the WDS or equivalent to the DLC-2.
• Clear the DTC from the PCM memory using
the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
4 IDENTIFY TRIGGER DTC FOR FREEZE FRAME
DATA
• Is P0192, P0193 or P1190 on FREEZE
FRAME DATA?
5 INSPECT FUEL LINE
• Turn the engine switch off.
• Inspect for fuel leakage or clogging in the
following fuel lines for each cylinder:
— Supply pump and Common rail.
— Common rail and fuel injector.
•
Is there any malfunction?
6 INSPECT SUCTION CONTROL VALVE
• Inspect the suction control valve.
• Is there any malfunction?
7 INSPECT FUEL PRESSURE SENSOR
• Inspect the fuel pressure sensor.
• Is there any malfunction?
8 INSPECT FUEL INJECTOR
• Inspect the fuel injector.
• Is there any malfunction?
9 VERIFY TROUBLESHOOTING OF DTC P0093
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
10 VERIFY AFTER REPAIR PROCEDURE
• Perform the Repair Verification Drive Mode.
(See F2–39 OBD DRIVE
• Are any DTCs present?
End Of Sie
ON-BOARD DIAGNOSTIC
INSPECTION
MODE.)
Yes Go to the next step.
No Record the FREEZE FRAME DATA on the repair order,
then go to the next step.
Yes Perform repair or diagnosis according to the available
Service Information.
• If the vehicle is not repaired, go to the next step.
No Go to the next step.
Yes Go to the next step.
No Intermittent concern exists.
Perform the "INTERMITTENT CONCERNS
TROUBLESHOOTING".
Yes Go to the applicable DTC inspection.
(See F2–40 DTC TABLE)
No Go to the next step.
Yes Repair or replace the suspected fuel line, go to Step 9.
No Go to the next step.
Yes Repair the supply pump, go to Step 9.
No Go to the next step.
Yes Replace the common rail, go to Step 9.
No Go to the next step.
Yes Replace the fuel injector, go to the next step.
No Go to the next step.
Yes Replace the PCM, go to the next step.
No Go to the next step.
Yes Go to the applicable DTC inspection.
(See F2–40 DTC TABLE)
No Troubleshooting completed.
B6E407000001104
ACTION
F2–47
F2