Dtc P0093 Fuel System Leak Detected - Large Leak

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
1Vd-Ftv Engine Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

MONITOR DESCRIPTION

INSPECTION PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0093)

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (FUEL LEAK TEST)

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (FUEL LEAK TEST)

CHECK WHETHER DTC OUTPUT RECURS (DTC P0093)

CHECK WHETHER DTC OUTPUT RECURS (DTC P0093)

READ VALUE USING INTELLIGENT TESTER (COMPENSATORY INJECTION VOLUME FOR EACH CYLINDER)

REPLACE FUEL SUPPLY PUMP

CHECK WHETHER DTC OUTPUT RECURS (DTC P0093 OUTPUT AREA)

REPAIR OR REPLACE FUEL LEAKAGE POINT

DTC CAUSED BY RUNNING OUT OF FUEL

REPLACE FUEL INJECTOR

REPLACE ECM

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P0093 Fuel System Leak Detected - Large Leak


DESCRIPTION

Refer to System Description (Click here).

P0093
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
After idling for 60 seconds, run engine at 2500 rpm for 30 seconds
The fuel pressure decreases greatly when the engine is running (1 trip detection logic).
  1. Fuel line between fuel supply pump and common rail
  2. Fuel line between common rail and fuel injector
  3. Fuel supply pump
  4. Common rail (for Bank 2) (pressure limiter)
  5. Fuel injector (P1238 set simultaneously)
  6. Open or short in EDU circuit (P062D and/or P062E set simultaneously)
  7. Open or short in fuel injector circuit (P062D, P062E and/or P1238 set simultaneously)
  8. EDU (P062D and/or P062E set simultaneously)
  9. Fuel line (air bleeding)
  10. ECM

Related Data List
DTC No.
Data List
P0093
  1. Fuel Press
  2. Target Common Rail Pressure
  3. Injection Pressure Correction
  4. Target Pump SCV Current
HINT:
  1. For more information on the common rail system, refer to System Description (Click here).
  2. If DTC P0093 is present, refer to the "Diagnostic Trouble Code (DTC) Table for Common Rail System" (Click here).
  3. When DTC P0093 is stored, check the internal fuel pressure of the common rail by entering the following menus: Powertrain / Engine / Data List / Fuel Press.

    Reference
    Engine Speed
    		Fuel Press
    Idling
    		Approximately 27 to 37 MPa
    2500 rpm (No engine load)
    		Approximately 50 to 70 MPa
  4. When there is an operating problem with the fuel supply pump (Fuel Press is less than Target Common Rail Pressure), the values of Injection Pressure Correction and Target Pump SCV Current will increase.

MONITOR DESCRIPTION

  1. P0093 (Fuel leaks in high-pressure areas):
    This DTC indicates that fuel leaks exist in highly-pressurized areas in the common rail system. The ECM constantly monitors the internal fuel pressure of the common rail after the engine is started. The ECM stores this DTC if the drop in the internal fuel pressure is large when the fuel is injected.
    In the common rail system, high-pressure fuel is always supplied to the high-pressure areas including the fuel supply pump, common rail, fuel injectors, and piping. The ECM adjusts the suction control valve opening angle to obtain the desired fuel pressure.
    If this DTC is stored, the ECM enters fail-safe mode. The fail-safe mode suspends both fuel injection and fuel supply pump operation, and then stops the engine. Before stopping the engine, the ECM permits the vehicle to be driven for 60 seconds. The fail-safe mode continues until the ignition switch is turned to off.

INSPECTION PROCEDURE

NOTICE:
  1. After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).
  2. After replacing the fuel supply pump, the ECM needs initialization (Click here).
  3. After replacing the fuel injector, the ECM needs registration (Click here).
HINT:
Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0093)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Enter the following menus: Powertrain / Engine / DTC.

  1. Read the DTCs.

    Result
    Display (DTC Output)
    		Proceed to
    P0093 is output
    		A
    P0093 and other DTCs are output
    		B


B
GO TO DTC CHART (Click here)
A


2.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (FUEL LEAK TEST)
HINT:
By performing this Active Test, the engine speed is maintained at 2000 rpm and the common rail internal fuel pressure is raised to the maximum operating pressure. As a result, a fuel leak check can be conducted while retaining the high common rail pressure.

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine and turn the tester on.

  1. Enter the following menus: Powertrain / Engine / Active Test / Test the Fuel Leak.

  1. Visually check the fuel supply pump, fuel injector and fuel line located between the fuel supply pump and common rail for fuel leaks and fuel pressure leaks. Also, perform the same check on the fuel line between the common rail and the fuel injector.

    OK:
    No leakage.


NG
Go to step 9
OK


3.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (FUEL LEAK TEST)

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine and turn the tester on.

  1. Enter the following menus: Powertrain / Engine / Active Test / Test the Fuel Leak / Data List / Fuel Press and Target Common Rail Pressure.

  1. When the Active Test is started, check that Fuel Press follows Target Common Rail Pressure and that the fuel pressure increases.

    OK:
    Fuel pressure reaches target pressure within 1 second.

Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf). Dtc P0093 Fuel System Leak Detected - Large Leak



OK
Go to step 8

NG
Go to step 4

4.CHECK WHETHER DTC OUTPUT RECURS (DTC P0093)

  1. Check the fuel receiver gauge. If the indicator is illuminated, add fuel.

  1. Operate the hand pump of the fuel filter, and bleed air from the fuel line.

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (Click here).

  1. Start the engine, and accelerate the engine at full throttle several times.

  1. Enter the following menus: Powertrain / Engine / DTC.

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    P0093 is output
    		A
    No DTC is output
    		B


B
Go to step 10
A


5.CHECK WHETHER DTC OUTPUT RECURS (DTC P0093)

  1. Start the engine, and allow the engine to idle for 20 seconds or more.

  1. Stop the engine, and wait for 15 seconds or more.

  1. Perform the procedures above 3 times or more in succession.

  1. Enter the following menus: Powertrain / Engine / DTC.

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    P0093 is output
    		A
    No DTC is output
    		B
HINT:
If the MIL turns off, accelerate the engine at full throttle several times.


B
Go to step 10
A


6.READ VALUE USING INTELLIGENT TESTER (COMPENSATORY INJECTION VOLUME FOR EACH CYLINDER)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Start the engine.

  1. After warming up the engine (engine coolant temperature is 75°C (167°F) or more), idle the engine (A/C off and electrical load off) for 1 minute or more.

  1. Enter the following menus: Powertrain / Engine / Data List / Injection Feedback Val #1 to #8.

  1. Read the values.

    OK:
    Compensatory injection volume is between -3.0 mm3/st to 3.0 mm3/st.
    HINT:
    1. If the fuel injector is malfunctioning, the compensatory injection volume remains at -5.0 mm3/st or 5.0 mm3/st.
    2. The compensatory injection volume is usually between -3.0 mm3/st to 3.0 mm3/st.
    3. Any cylinders that have a higher compensatory injection volume than shown above are considered to be faulty.


NG
Go to step 11
OK


7.REPLACE FUEL SUPPLY PUMP

  1. Replace the fuel supply pump (Click here).


NEXT


8.CHECK WHETHER DTC OUTPUT RECURS (DTC P0093 OUTPUT AREA)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Clear the DTCs (Click here).

  1. Allow the engine to idle for 1 minute and then run it at 2500 rpm for 30 seconds.

  1. Enter the following menus: Powertrain / Engine / DTC.

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    No DTC is output
    		A
    P0093 is output
    		B


B
Go to step 12
A

END

9.REPAIR OR REPLACE FUEL LEAKAGE POINT


NEXT
Go to step 13

10.DTC CAUSED BY RUNNING OUT OF FUEL


NEXT
Go to step 13

11.REPLACE FUEL INJECTOR

  1. Replace the fuel injector (Click here).



NEXT
Go to step 13

12.REPLACE ECM

  1. Replace the ECM (Click here).


NEXT


13.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON and start the engine.

  1. Allow the engine to idle for 1 minute and then run it at 2500 rpm for 30 seconds.

  1. Confirm that the DTC is not output again.

    HINT:
    Perform the following procedure using the tester to determine whether or not the DTC judgment has been carried out.

    1. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

    2. Input DTC P0093.

    3. Check that STATUS is NORMAL. If STATUS is INCOMPLETE or UNKNOWN, maintain the engine at 2500 rpm for 30 seconds and then increase idling time.


NEXT

END