DTC P0093 [MZR-CD (RF Turbo)]

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DTC P0093

Fuel system leak detection
DETECTION CONDITION
•  The PCM monitors the fuel quantity corresponding to fuel pressure change from the fuel pressure sensor while the engine running. If the fuel quantity higher than the preprogrammed criteria, the PCM determines fuel system leakage.
Diagnostic support note
•  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.
POSSIBLE CAUSE
•  Fuel leakage or clogged fuel line
•  Suction control valve malfunction
•  Supply pump malfunction
•  Fuel pressure sensor malfunction
•  Fuel injector malfunction
•  Fuel pipe improper connection on fuel tank
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related repair information available?
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.
3
VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT?
•  Connect the M-MDS to the DLC-2.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Is the same DTC present?
Yes
Go to the next step.
No
Intermittent concern exists.
Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”.
4
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
•  Is P0192 or P0193 on FREEZE FRAME DATA?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR-CD (RF Turbo)]
.)
No
Go to the next step.
5
INSPECT FUEL PIPE CONNECTION ON FUEL TANK
•  Inspect the fuel pipes for supply and return connection at fuel tank.
•  Are fuel pipes connected properly?
Yes
Go to the next step.
No
Reconnect fuel pipes properly, then go to Step 10.
6
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?
Yes
Repair or replace the suspected fuel line, go to Step 10.
No
Go to the next step.
7
INSPECT SUCTION CONTROL VALVE
•  Inspect the suction control valve.
•  Is there any malfunction?
Yes
Repair the supply pump, go to Step 10.
(See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No
Go to the next step.
8
INSPECT FUEL PRESSURE SENSOR
•  Inspect the fuel pressure sensor.
•  Is there any malfunction?
Yes
Replace the common rail, go to Step 10.
No
Go to the next step.
9
INSPECT FUEL INJECTOR
•  Inspect the fuel injector.
•  Is there any malfunction?
Yes
Replace the fuel injector, go to the next step.
(See FUEL INJECTOR REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No
Go to the next step.
10
VERIFY TROUBLESHOOTING OF DTC P0093 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Is the same DTC present?
Yes
Replace the PCM, go to the next step.
(See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
•  Perform the Repair Verification Drive Mode.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR-CD (RF Turbo)])
No
Troubleshooting completed.