Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000262IZ
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: G16E-GTS (ENGINE CONTROL): SFI SYSTEM: P2BF412; Exhaust Flow Control Valve "A" Position Circuit High Circuit Short to Battery; 2023 - 2025 MY GR Corolla [09/2022 -        ]

DTC

P2BF412

Exhaust Flow Control Valve "A" Position Circuit High Circuit Short to Battery

DESCRIPTION

Refer to DTC P26C518.

Click here 2023 - 2025 MY GR Corolla [09/2022 -        ]; G16E-GTS (ENGINE CONTROL): SFI SYSTEM: P26C518,P26C519; Exhaust Flow Control Valve "A" Control Circuit Low Circuit Current Below Threshold+

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

P2BF412

Exhaust Flow Control Valve "A" Position Circuit High Circuit Short to Battery

Diagnosis condition:

  • Ignition switch ON

Abnormal condition:

  • The exhaust pipe gas control actuator sub-assembly (opening angle sensor) output voltage is higher than 4.73 V.

Malfunction time:

  • 3 seconds or more

Trip logic:

  • 1 trip detection logic

Detection conditions:

  • Continuous

Sensors/components used for detection:

  • Exhaust pipe gas control actuator sub-assembly (opening angle sensor)
  • Open or short in exhaust pipe gas control actuator sub-assembly circuit
  • Exhaust pipe gas control actuator sub-assembly
  • ECM

Does not come on

SAE Code: P2BF7

MONITOR DESCRIPTION

When the ignition switch is turned ON and the exhaust pipe gas control actuator sub-assembly (opening angle sensor) output voltage is higher than 4.73 V for 3 seconds or more, the ECM determines that the exhaust pipe gas control actuator sub-assembly (opening angle sensor) circuit is malfunctioning and stores a DTC.

CONFIRMATION DRIVING PATTERN

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the GTS on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the ignition switch off and wait for at least 30 seconds.
  6. Turn the ignition switch to ON.
  7. Turn the GTS on.
  8. Wait 5 seconds or more.
  9. Enter the following menus: Powertrain / Engine / Trouble Codes.
  10. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  12. Proceed to the next screen and enter the DTC to be checked.
  13. Check the DTC judgment result.

    GTS Display

    Description

    NORMAL
    • DTC judgment completed
    • System normal

    ABNORMAL
    • DTC judgment completed
    • System abnormal

    INCOMPLETE
    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.

WIRING DIAGRAM

Refer to DTC P26C518.

Click here 2023 - 2025 MY GR Corolla [09/2022 -        ]; G16E-GTS (ENGINE CONTROL): SFI SYSTEM: P26C518,P26C519; Exhaust Flow Control Valve "A" Control Circuit Low Circuit Current Below Threshold+

CAUTION / NOTICE / HINT

HINT:

Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1.

CHECK TERMINAL VOLTAGE (EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY)

*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.

(a) Disconnect the exhaust pipe gas control actuator sub-assembly connector.

(b) Turn the ignition switch to ON.

(c) 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.

NG

GO TO STEP 4

OK

2.

CHECK HARNESS AND CONNECTOR (EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY- BODY GROUND)

(a) Disconnect the exhaust pipe gas control actuator sub-assembly connector.

(b) 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
OK

REPLACE EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY

NG

3.

CHECK HARNESS AND CONNECTOR (EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY - ECM)

(a) Disconnect the exhaust pipe gas control actuator sub-assembly connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

O173-2 (RHE2) - C143-22 (EEXA)

Always

Below 1 Ω
OK

REPLACE ECM 2023 MY GR Corolla [09/2022 - 11/2022]; G16E-GTS (ENGINE CONTROL): ECM: REMOVAL 2023 - 2025 MY GR Corolla [11/2022 -        ]; G16E-GTS (ENGINE CONTROL): ECM: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

CHECK HARNESS AND CONNECTOR (EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY - ECM)

(a) Disconnect the exhaust pipe gas control actuator sub-assembly connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

O173-1 (RHVC) or C143-32 (VCEA) - Body ground and other terminals

Always

10 kΩ or higher
OK

REPLACE ECM 2023 MY GR Corolla [09/2022 - 11/2022]; G16E-GTS (ENGINE CONTROL): ECM: REMOVAL 2023 - 2025 MY GR Corolla [11/2022 -        ]; G16E-GTS (ENGINE CONTROL): ECM: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR