DTC P0627-12: Fuel Pump "A" Control Circuit Short to Battery [08/2023 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus RX 450h+, 2025 Lexus RX 350h, 2024 Lexus RX 450h+, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT ECM (CHECK FOR SHORT)
Pre-procedure1
- 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 Result H122-2 (FPC) - Body ground Ignition switch ON Below 1 V V Result
Proceed to OK NG
Post-procedure1
- None.
Result:
OK
REPLACE FUEL PUMP CONTROL ECU. Refer to REMOVAL [08/2023 - ]
Result:
NG
See step 2
- CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - ECM)
Pre-procedure1
- 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 Result H122-2 (FPC) or A15-16 (FPC) - Other terminals Always 10 kΩ or higher kΩ Result
Proceed to OK NG
Post-procedure1
- None.
Result:
OK
REPLACE ECM. Refer to REMOVAL [08/2023 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR