DTC P0627-12: Fuel Pump "A" Control Circuit Short to Battery [03/2022 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT ECM (CHECK FOR SHORT)
- Disconnect the fuel pump control ECU connector.
- Turn the ignition switch to ON.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition G106-2 (FPC) - Body ground Ignition switch ON Below 1 V Result
Proceed to OK NG
Result:
OK
REPLACE FUEL PUMP CONTROL ECU. Refer to REMOVAL [11/2021 - ]
Result:
NG
See step 2
- CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - ECM)
- Disconnect the fuel pump control ECU connector.
- Disconnect the ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G106-2 (FPC) or A18-6 (FPC) - Other terminals Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE ECM. Refer to REMOVAL [11/2021 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR