DTC P1235-13: High Pressure Fuel Pump Circuit Open [11/2021 - 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 FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE)
Refer to INSPECTION [11/2021 - ]
HINT:
Perform "Inspection After Repair" after replacing the fuel (engine room side) pump assembly (for high pressure side).
Refer to INITIALIZATION [11/2021 - ]
Result
Proceed to OK NG Result:
NG
REPLACE FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE). Refer to REMOVAL [11/2021 - ]
Result:
OK
See step 2
- CHECK HARNESS AND CONNECTOR (FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE) - ECM)
- 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 B21-1 (FP+) - B48-19 (FP1+) Always Below 1 Ω B21-2 (FP-) - B48-18 (FP1-) Always Below 1 Ω B21-1 (FP+) or B48-19 (FP1+) - Body ground and other terminals Always 10 kΩ or higher B21-2 (FP-) or B48-18 (FP1-) - Body ground and 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