DTC P125A-14: Fuel Flow Control Valve Circuit Short to Ground or Open [10/2014 - ]: Procedure

1. Inspect the pressure discharge valve assembly.

   Refer to INSPECTION [10/2014 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE PRESSURE DISCHARGE VALVE ASSEMBLY. Refer to  REMOVAL [10/2014 - ] 

Result: 

OK 

See step  2

1. Disconnect the fuel suction plate sub-assembly (pressure discharge valve assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Fuel Suction Plate Sub-assembly)

2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   b1-2 (SFC+) - Body ground	Engine switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (PRESSURE DISCHARGE VALVE ASSEMBLY - EFI-MAIN NO. 1 RELAY) 

Result: 

OK 

See step  3

1. Disconnect the fuel suction plate sub-assembly (pressure discharge valve assembly) connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   b1-3 (SFC-) - A35-19 (RFV)	Always	Below 1 Ω
   b1-3 (SFC-) or A35-19 (RFV) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

5. Turn the engine switch off and wait for at least 30 seconds.
6. Start the engine and warm it up.
7. Turn the Techstream on.
8. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
9. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

   Powertrain > Engine > Utility 

   Tester Display
   All Readiness

10. Input the DTC: P125A-14.
11. Check the DTC judgment result.

    Result

    Result	Proceed to
    NORMAL (DTCs are not output)	A
    ABNORMAL (DTC P125A-14 is output)	B

Result: 

A 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [10/2014 - ] 

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [10/2014 - 05/2019]  , or refer to  REMOVAL [05/2019 - ]