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Home >> Toyota >> 2024 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different car >> Section 169 (Engine Control System - Diagnostic Codes (9 Of 9) & Symptom Tests (1 Of 3)) >> SFI System >> DTC P2BF4-12: Exhaust Flow Control Valve "A" Position Circuit High Circuit Short to Battery [09/2024 - ] >> Procedure

DTC P2BF4-12: Exhaust Flow Control Valve "A" Position Circuit High Circuit Short to Battery [09/2024 - ]: Procedure

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  1. CHECK TERMINAL VOLTAGE (EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY) 
    GTY1103652Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Front view of wire harness connector
    (to Exhaust Pipe Gas Control Actuator Sub-assembly)

    HINT: 

    Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.

    1. Disconnect the exhaust pipe gas control actuator sub-assembly connector.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      O173-1 (RHVC) - Body ground Ignition switch ON Below 1 V

      HINT: 

      If the value differs from standard, there may be a short in the power source circuit.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  4

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY- BODY GROUND) 
    1. Disconnect the exhaust pipe gas control actuator sub-assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O173-2 (RHE2) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY 

    Refer to REMOVAL [09/2022 - ]

    Result: 

    NG 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY - ECM) 
    1. Disconnect the exhaust pipe gas control actuator sub-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
      O173-2 (RHE2) - C143-55 (EEXA) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM 

    Refer to REMOVAL [09/2024 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  4. CHECK HARNESS AND CONNECTOR (EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY - ECM) 
    1. Disconnect the exhaust pipe gas control actuator sub-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
      O173-1 (RHVC) or C143-51 (VCEA) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM 

    Refer to REMOVAL [09/2024 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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