DTC P12D0-13: Fuel Pump Control (All Phase) Circuit Open; DTC P12D1-13: Fuel Pump Control (U Phase) Circuit Open; DTC P12D2-13: Fuel Pump Control (V Phase) Circuit Open; DTC P12D3-13: Fuel Pump Control (W Phase) Circuit Open [10/2022 - ]: Procedure
WARNING: This page is about a different car, the 2025 Toyota Highlander, 2024 Toyota Highlander, and 2023 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
- PERFORM ACTIVE TEST USING GTS (FUEL PUMP SINGLE PHASE ENERGIZATION)
*a Component without harness connected
(Fuel Pump Control ECU)HINT:
Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.
- Disconnect the M53 fuel pump control ECU connector.
- Operate the fuel pump control ECU using the Active Test function and measure the voltage according to the value(s) in the table below.
Powertrain > Engine > Active Test
Tester Display Fuel Pump Single Phase Energization Standard Voltage
Tester Connection GTS Operation Specified Condition M53-2 (FPU) - Body ground U Phase 4.4 to 8.4 V* M53-3 (FPV) - Body ground V Phase 4.4 to 8.4 V* M53-4 (FPW) - Body ground W Phase 4.4 to 8.4 V* HINT:
- *: This Active Test limits the fuel pump control ECU output duty cycle to 50%. Therefore, the output voltage of the fuel pump control ECU will be approximately 50% of the power source voltage (+B terminal).
- Before performing this inspection, check that the battery voltage is between 11 and 14 V (not depleted).
Result
Proceed to OK NG
Result:
NG
REPLACE FUEL PUMP CONTROL ECU
Refer to REMOVAL [10/2022 - ]
Result:
OK
See step 2
- CHECK HARNESS AND CONNECTOR (FUEL PUMP CONTROL ECU - FUEL PUMP (FOR LOW PRESSURE SIDE))
HINT:
Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.
- Disconnect the fuel pump control ECU connector.
- Disconnect the fuel pump (for low pressure side) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition M53-2 (FPU) - M87-3 (BLPU) Always Below 1 Ω M53-3 (FPV) - M87-4 (BLPV) Always Below 1 Ω M53-4 (FPW) - M87-2 (BLPW) Always Below 1 Ω Result
Proceed to OK NG HINT:
Perform "Inspection After Repair" after replacing the fuel pump (for low pressure side).
Refer to INITIALIZATION [10/2022 - ]
Result:
OK
REPLACE FUEL PUMP (FOR LOW PRESSURE SIDE)
Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR