DTC P1235-13: High Pressure Fuel Pump Circuit Open [09/2022 - ]: Procedure
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2024 Lexus IS 300, 2023 Lexus IS 300, 2022 Lexus IS 300, 2021 Lexus IS 300, and 2020 Lexus IS 300. 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)
- Inspect the fuel pump assembly (for high pressure side).
Refer to INSPECTION [08/2015 - ]
HINT:
Perform "Inspection After Repair" after replacing the fuel pump assembly (for high pressure side).
Refer to INITIALIZATION [09/2019 - ]
Result
Proceed to OK NG
Result:
NG
REPLACE FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE). Refer to REMOVAL [08/2015 - ]
Result:
OK
See step 2
- Inspect the fuel pump assembly (for high pressure side).
- CHECK HARNESS AND CONNECTOR (FUEL PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE) - ECM)
- Disconnect the ECM connector.
- Disconnect the fuel pump assembly (for high pressure side) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition F93-1 (FP+) - F78-28 (FP1+) Always Below 1 Ω F93-2 (FP-) - F78-29 (FP1-) Always Below 1 Ω F93-1 (FP+) or F78-28 (FP1+) - Body ground and other terminals Always 10 kΩ or higher F93-2 (FP-) or F78-29 (FP1-) - Body ground and other terminals Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE ECM. Refer to REMOVAL [08/2015 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR