DTC P1235-13: High Pressure Fuel Pump Circuit Open [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 FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE)
Refer to INSPECTION [10/2022 - ]
Result
Proceed to OK NG Result:
NG
REPLACE FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE). Refer to REMOVAL [08/2023 - ]
Result:
OK
See step 2
- CHECK HARNESS AND CONNECTOR (FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE) - ECM)
Pre-procedure1
- Disconnect the fuel (engine room side) pump assembly (for high pressure side) 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 B15-1 (FP+) - B28-19 (FP1+) Always Below 1 Ω Ω B15-2 (FP-) - B28-18 (FP1-) Always Below 1 Ω Ω B15-1 (FP+) or B28-19 (FP1+) - Body ground and other terminals Always 10 kΩ or higher kΩ B15-2 (FP-) or B28-18 (FP1-) - Body ground and 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