Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 1VD-FTV ENGINE CONTROL
CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0088)
CHECK FREEZE FRAME DATA (COMMON RAIL PRESSURE)
CHECK WIRE HARNESS (FUEL PRESSURE SENSOR AND ECM)
REPLACE FUEL SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)
PERFORM SUPPLY PUMP INITIALIZATION
REPAIR OR REPLACE HARNESS OR CONNECTOR
CHECK WIRE HARNESS (FUEL PRESSURE SENSOR AND ECM)
REPLACE COMMON RAIL ASSEMBLY (FOR BANK 1) (FUEL PRESSURE SENSOR)
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
DTC P0088 Fuel Rail / System Pressure - Too High
DESCRIPTION
| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
| After idling for 60 seconds, quickly increase engine speed to 2500 rpm repeatedly for 30 seconds | The fuel pressure of the common rail exceeds 250000 kPa (2350 kgf/cm2, 36250 psi). (1 trip detection logic) | Suction control valve (fuel supply pump assembly) Open or short in suction control valve circuit Fuel pressure sensor (common rail assembly (for bank 1)) ECM |
| DTC No. | Data List |
| P0088 | Common Rail Pressure Target Common Rail Pressure Target Pump SCV Current |
- HINT:
| Engine Speed | Common Rail Pressure |
| Idling | Approximately 27000 to 49000 kPa |
| 3000 rpm (No engine load) | Approximately 57000 to 77000 kPa |
MONITOR DESCRIPTION
The ECM stores this DTC if the fuel pressure inside the common rail assembly is higher than 250000 kPa (2550 kgf/cm2, 36250 psi). This DTC indicates that: 1) the suction control valve may be stuck open, or 2) there may be a short in the suction control valve circuit.
If this DTC is stored, the ECM enters fail-safe mode and limits the engine power. The ECM continues operating in fail-safe mode until the engine switch is turned off.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- HINT:
- Read freeze frame data using the GTS. 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 FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0088) |
Connect the GTS to the DLC3.
Turn the engine switch on (IG) and turn the GTS on.
Enter the following menus: Engine and ECT / Trouble Codes.
Read Current DTCs.
| Result | Proceed to |
| P0088 is output | A |
| P0088 and "P0190, P0192 or P0193" are output | B |
- HINT:
- When there is an open circuit in the fuel pressure sensor circuit, the fuel pressure sensor outputs the maximum value. Therefore, P0088 may be stored together with DTCs which indicate common rail fuel pressure sensor circuit malfunctions.
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| A | |
| 2.CHECK FREEZE FRAME DATA (COMMON RAIL PRESSURE) |
Connect the GTS to the DLC3.
Turn the engine switch on (IG) and turn the GTS on.
Enter the following menus: Engine and ECT / Trouble Codes.
Record the stored DTCs and freeze frame data.
| Result | Proceed to |
| Value of Common Rail Pressure is shifting towards 160000 kPa or higher in 3rd and 4th set of freeze frame data | B |
| Except above | A |
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| A | |
| 3.CHECK WIRE HARNESS (FUEL PRESSURE SENSOR AND ECM) |
- HINT:
- If the MIL has illuminated before in the past, clear the DTC using the GTS before performing this inspection ().
| *1 | Engine | *2 | Engine Wire |
| *3 | Common Rail Assembly (for Bank 1) (Fuel Pressure Sensor) | *4 | Wire to Wire |
| *5 | ECM | - | - |
| *a | Vibration Method (Reference) | - | - |
Check if the MIL lights up when vibration is applied to the wire harness and connectors between the fuel pressure sensor and ECM.
- Result:
Result Proceed to MIL does not come on A MIL comes on B
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| A | |
| 4.REPLACE FUEL SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE) |
Replace the fuel supply pump assembly ().
- HINT:
- Before replacing the fuel supply pump assembly, check that the wire harness between the suction control valve and ECM is not shorted to ground.
- When there is a malfunction in the wire harness, Target Pump SCV Current is outside the range of 802 to 1202 mA when idling, and outside the range of 840 to 1240 mA when the engine is running at 2500 rpm without load.
- If there are no problems with the engine condition during idling, it is not necessary to perform the above wire harness inspection.
- When the wire harness between the suction control valve and ECM is not shorted to ground, it can be assumed that DTC P0088 was stored due to a malfunction in the operation of the suction control valve. Therefore, it is necessary to replace the fuel supply pump assembly.
| NEXT | |
| 5.BLEED AIR FROM FUEL SYSTEM |
Bleed the air from the fuel system ().
Perform PM forced regeneration ().
- HINT:
- When fuel lines are disconnected, air may enter the fuel lines, leading to engine starting trouble. Therefore, perform forced regeneration and bleed the air from the fuel lines.
| NEXT | |
| 6.PERFORM SUPPLY PUMP INITIALIZATION |
Perform supply pump initialization ().
| NEXT | |
| 7.CHECK DTC OUTPUT |
Connect the GTS to the DLC3.
Clear the DTCs ().
Turn the engine switch off for 30 seconds or more.
Turn the engine switch on (IG) and start the engine.
After idling for 60 seconds, increase the engine speed from idling to 2500 rpm repeatedly for 30 seconds.
Confirm that the DTC is not output again.
- HINT:
- Perform the following procedure using the GTS to determine whether or not the DTC judgment has been carried out.
Enter the following menus: Engine and ECT / Utility / All Readiness.
Input DTC P0088.
Check the DTC judgment result.
| GTS Display | Result | Proceed to |
| Pending DTC | P0088 is output | A |
| All Readiness | NORMAL | B |
| ABNORMAL | A |
- HINT:
- If STATUS is INCOMPLETE or N/A, race the engine to 2500 rpm repeatedly for 30 seconds and increase the idling time.
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| A | |
| 8.REPLACE ECM |
Replace the ECM ().
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| 9.REPAIR OR REPLACE HARNESS OR CONNECTOR |
Repair or replace the harness or connector.
| NEXT | |
| 10.CHECK WIRE HARNESS (FUEL PRESSURE SENSOR AND ECM) |
- HINT:
- If the MIL has illuminated before in the past, clear the DTC using the GTS before performing this inspection ().
| *1 | Engine | *2 | Engine Wire |
| *3 | Common Rail Assembly (for Bank 1) (Fuel Pressure Sensor) | *4 | Wire to Wire |
| *5 | ECM | - | - |
| *a | Vibration Method (Reference) | - | - |
Check if the MIL lights up when vibration is applied to the wire harness and connectors between the fuel pressure sensor and ECM.
- Result:
Result Proceed to MIL does not come on A MIL comes on B
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| A | |
| 11.REPLACE COMMON RAIL ASSEMBLY (FOR BANK 1) (FUEL PRESSURE SENSOR) |
Replace the common rail assembly (for bank 1) ().
| NEXT | |
| 12.BLEED AIR FROM FUEL SYSTEM |
Bleed the air from the fuel system ().
Perform PM forced regeneration ().
- HINT:
- When fuel lines are disconnected, air may enter the fuel lines, leading to engine starting trouble. Therefore, perform forced regeneration and bleed the air from the fuel lines.
| NEXT | |
| 13.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED |
Connect the GTS to the DLC3.
Clear the DTCs ().
Turn the engine switch off for 30 seconds or more.
Turn the engine switch on (IG) and start the engine.
After idling for 60 seconds, increase the engine speed from idling to 2500 rpm repeatedly for 30 seconds.
Confirm that the DTC is not output again.
- HINT:
- Perform the following procedure using the GTS to determine whether or not the DTC judgment has been carried out.
Enter the following menus: Engine and ECT / Utility / All Readiness.
Input DTC P0088.
Check that STATUS is NORMAL. If STATUS is INCOMPLETE or N/A, race the engine to 2500 rpm repeatedly for 30 seconds and increase the idling time.
| NEXT | ||
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