Lexus IS250 IS220d GSE20 ALE20 2AD-FHV ENGINE CONTROL SYSTEM
CHECK HARNESS AND CONNECTOR (SCV - ECM)
CHECK IF DTC OUTPUT REOCCURS (SEE IF DTC P0627 IS OUTPUT AGAIN)
DTC P0627 Fuel Pump Control Circuit / Open
DESCRIPTION
| DTC No. | DTC Detection Condition | Trouble Area |
| P0627 | Open or short in suction control valve circuit for more than 0.5 seconds (1 trip detection logic) |
Open or short in suction control valve circuit Suction control valve ECM |
- HINT:
For more information on the supply pump (suction control valve) and the common rail system, refer to the system description .
When DTC P0627 is set, check the internal fuel pressure of the common rail by entering the following menus on the intelligent tester: Powertrain / Engine / Data List / Fuel Press.
| Engine Speed | Fuel Pressure |
| Idling | Approximately 37 to 43 MPa |
| 2,500 rpm (No engine load) | Approximately 60 to 66 MPa |
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
After replacing the ECM, the new ECM needs registration and initialization .
After replacing a supply pump, the ECM needs initialization .
| 1.INSPECT SUPPLY PUMP ASSEMBLY |
Disconnect the E70 suction control valve connector.
Measure the resistance of the suction control valve.
- Standard resistance:
Condition Specified Condition 20°C (68°F) 1.9 to 2.3 Ω
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| OK | |
| 2.CHECK HARNESS AND CONNECTOR (SCV - ECM) |
Disconnect the E70 valve connector.
Disconnect the E59 ECM connector.
Measure the resistance of the wire harness side connectors.
- Standard resistance:
Tester Connection Specified Condition PCV+ (E70-1) - PCV+ (E59-42) Below 1 Ω PCV- (E70-2) - PCV- (E59-41) Below 1 Ω PCV+ (E70-1) or PCV+ (E59-42) - Body ground 10 kΩ or higher PCV- (E70-2) or PCV- (E59-41) - Body ground 10 kΩ or higher
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| OK | |
| 3.CHECK IF DTC OUTPUT REOCCURS (SEE IF DTC P0627 IS OUTPUT AGAIN) |
Connect the intelligent tester to the DLC3.
Turn the engine switch ON (IG) and turn the tester ON.
Clear DTCs.
Start the engine.
Enter the following menus: Powertrain / Engine / DTC.
Read the DTCs using the intelligent tester.
- Result:
Display (DTC output) Proceed to P0627 A No output B
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| A | ||
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LEXUS IS250, IS220d / GSE20 ALE20