DTC P1235-13: High Pressure Fuel Pump Circuit Open [06/2018 - 08/2020]: Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT FUEL PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE)
- Inspect the fuel pump assembly (for high pressure side).
Refer to INSPECTION [06/2018 - ]
HINT:
Perform "Inspection After Repair" after replacing the fuel pump assembly (for high pressure side).
Refer to INITIALIZATION [06/2018 - 07/2019] , or refer to INITIALIZATION [07/2019 - 08/2020]
Result
Proceed to OK NG
Result:
NG
REPLACE FUEL PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE). Refer to REMOVAL [06/2018 - 08/2021]
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 fuel 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 C99-1 (FP+) - C88-19 (FP1+) Always Below 1 Ω C99-2 (FP-) - C88-18 (FP1-) Always Below 1 Ω C99-1 (FP+) or C88-19 (FP1+) - Body ground and other terminals Always 10 kΩ or higher C99-2 (FP-) or C88-18 (FP1-) - Body ground and other terminals Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE ECM. Refer to REMOVAL [06/2018 - 08/2020]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR