INSPECT FUEL SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)
CHECK HARNESS AND CONNECTOR (SUCTION CONTROL VALVE - ECM)
CHECK WHETHER DTC OUTPUT RECURS
REPLACE FUEL SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)
PERFORM FUEL SUPPLY PUMP INITIALIZATION
REPAIR OR REPLACE HARNESS OR CONNECTOR
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
DTC P0627 Fuel Pump Control Circuit / Open |
DESCRIPTION
| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
| Idling for 1 second | Even though the CPU (command area inside the ECU) is outputting the suction control valve operation duty, the output monitor signal is absent for 0.5 seconds (1 trip detection logic). |
|
| DTC No. | Data List |
| P0627 | Fuel Press Target Common Rail Pressure |
- HINT:
- For more information on the fuel supply pump assembly (suction control valve) and common rail system, refer to System Description (HILUX_TGN26 RM000000XSN02EX.html).
- When DTC P0627 is stored, check the internal fuel pressure of the common rail by entering the following menus on the intelligent tester: Powertrain / Engine and ECT / Data List / Fuel Press.
Under a stable operating condition such as idling, Fuel Press is within 5000 kPa of Target Common Rail Pressure.
WIRING DIAGRAM
Refer to DTC P0088 (HILUX_TGN26 RM000001884068X_06.html).INSPECTION PROCEDURE
- NOTICE:
- After replacing the ECM, the new ECM needs registration (HILUX_TGN26 RM0000012XK05CX.html) and initialization (HILUX_TGN26 RM000000TIN04EX.html).
- After replacing the fuel supply pump assembly, the ECM needs initialization (HILUX_TGN26 RM000000TIN04EX.html).
- 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.INSPECT FUEL SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE) |
Inspect the fuel supply pump assembly (HILUX_TGN26 RM0000014FM019X.html).
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| OK | |
| 2.CHECK HARNESS AND CONNECTOR (SUCTION CONTROL VALVE - ECM) |
Disconnect the suction control valve connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C5-1 - C22-2 (PCV+) Always Below 1 Ω C5-2 - C22-1 (PCV-) Always Below 1 Ω C5-1 or C22-2 (PCV+) - Body ground Always 10 kΩ or higher C5-2 or C22-1 (PCV-) - Body ground Always 10 kΩ or higher
Reconnect the suction control valve connector.
Reconnect the ECM connector.
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| OK | |
| 3.CHECK WHETHER DTC OUTPUT RECURS |
Connect the intelligent tester to the DLC3
Turn the ignition switch to ON and turn the tester on.
Clear the DTCs (HILUX_TGN26 RM000000PDK0XCX.html).
Start the engine and idle it for 1 second or more.
Enter the following menus: Powertrain / Engine and ECT / DTC.
Read the DTCs.
Result Result Proceed to No DTC is output A P0627 is output B
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| A | ||
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| 4.REPLACE FUEL SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE) |
Replace the fuel supply pump assembly (HILUX_TGN26 RM0000014FO01RX.html).
| NEXT | |
| 5.BLEED AIR FROM FUEL SYSTEM |
Bleed the air from the fuel system (HILUX_TGN26 RM000002SY8025X_01_0002.html).
| NEXT | |
| 6.PERFORM FUEL SUPPLY PUMP INITIALIZATION |
Perform fuel supply pump initialization (HILUX_TGN26 RM000000TIN04EX.html).
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| 7.REPLACE ECM |
Replace the ECM (HILUX_TGN26 RM0000013Z001IX.html).
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| 8.REPAIR OR REPLACE HARNESS OR CONNECTOR |
Repair or replace the harness or connector.
| NEXT | |
| 9.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED |
Connect the intelligent tester to the DLC3.
Clear the DTCs (HILUX_TGN26 RM000000PDK0XCX.html).
Turn the ignition switch off for 30 seconds or more.
Start the engine and idle it for 1 second or more.
Confirm that the DTC is not output again.
| NEXT | ||
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