Lexus IS250 IS220d GSE20 ALE20 2AD-FHV ENGINE CONTROL SYSTEM
TYPICAL MALFUNCTION THRESHOLDS
READ VALUE OF INTELLIGENT TESTER (COMPENSATORY INJECTION VOLUME)
PERFORM ACTIVE TEST BY INTELLIGENT TESTER (FUEL LEAK TEST)
DTC P0093 Fuel System Leak Detected - Large Leak
DESCRIPTION
| DTC No. | DTC Detection Condition | Trouble Area |
| P0093 | Fuel leaks in high-pressure areas (1 trip detection logic) |
Fuel line between supply pump and common rail Fuel line between common rail and each injector Supply pump Common rail Injectors Pressure discharge vavle Open or short in EDU circuit (P0200 set simultaneously) Open or short in injector circuit EDU (P0200 set simultaneously) ECM |
- HINT:
| Engine Speed | Fuel Pressure |
| Idling | Approximately 37 to 43 MPa |
| 3,000 rpm (No engine load) | Approximately 60 to 66 MPa |
MONITOR DESCRIPTION
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 sets this DTC if the drop in the internal fuel pressure is large when injecting the fuel.
In the common rail system, high-pressure fuel is always supplied to the high-pressure areas including the supply pump, common rail, injectors, and piping. The ECM adjusts the suction control valve opening angle to obtain the desired fuel pressure.
If this DTC is set, the ECM enters fail-safe mode. The fail-safe mode suspends both fuel injection and supply pump operation, and then stops the engine. Before stopping the engine, the ECM permits the vehicle to be driven for 1 minute. The fail-safe mode continues until the engine switch is turned OFF.
MONITOR STRATEGY
| Required sensors | Fuel Pressure sensor |
| Frequency of operation | Continuous |
| Duration | 1 second |
| MIL operation | 1 driving cycle |
TYPICAL ENABLING CONDITIONS
| Item | Specification | Specification |
| Minimum | Maximum | |
| Engine speed | 700 rpm | - |
| The monitor will not run if the fuel pressure sensor or suction control valve circuit is malfunctioning. | ||
TYPICAL MALFUNCTION THRESHOLDS
| Threshold |
| Large drop in the internal fuel pressure when injecting fuel |
INSPECTION PROCEDURE
- NOTICE:
- After replacing an injector, the ECM needs registration .
| 1.CHECK OTHER DTC OUTPUT |
Connect the intelligent tester to the DLC3.
Turn the engine switch ON (IG) and turn the intelligent tester ON.
Enter the following menus: Powertrain / Engine / DTC.
Read the DTCs.
- Result:
Display (DTC Output) Proceed to P0093 A P0093 and "P0200 and/or 1229" B
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| A | |
| 2.CHECK FUEL LEAKAGE |
Visually check the supply pump, each injector and fuel line located between the supply pump and common rail for fuel leaks or fuel pressure leaks. Also, perform the same check on the fuel lines between the common rail and each injector.
- HINT:
- There is a possibility that fuel leaks inside the components (supply pump, etc.) have occurred.
- OK:
- No leakage
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| OK | |
| 3.READ VALUE OF INTELLIGENT TESTER (COMPENSATORY INJECTION VOLUME) |
Connect the intelligent tester to the DLC3.
Start the engine and turn the intelligent tester ON.
Enter the following menus: Powertrain / Engine / Data List / Injection Feedback Val #1, #2, #3 and #4.
Read the value.
- OK:
- Compensatory injection volume is not between -4.9 mm3 and 4.9 mm3.
- HINT:
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| OK | |
| 4.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (FUEL LEAK TEST) |
Connect the intelligent tester to the DLC3.
Start the engine and turn the intelligent tester ON.
Enter the following menus: Powertrain / Engine / Active Test / Test the Fuel Leak.
Check for fuel leaks in the high-pressure areas.
| NEXT | ||
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