Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000262J1
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: G16E-GTS (ENGINE CONTROL): SFI SYSTEM: P26C573; Exhaust Flow Control Valve "A" Control Performance Actuator Stuck Closed; 2023 - 2025 MY GR Corolla [09/2022 -        ]

DTC

P26C573

Exhaust Flow Control Valve "A" Control Performance Actuator Stuck Closed

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

P26C573

Exhaust Flow Control Valve "A" Control Performance Actuator Stuck Closed

Both of the following conditions are met for 14.5 seconds or more (1 trip detection logic):

  • The exhaust change valve is instructed to open by the ECM
  • The value of the exhaust pipe gas control actuator sub-assembly (opening angle sensor) is less than the threshold
  • Exhaust tailpipe assembly (exhaust change valve)
  • Exhaust pipe gas control actuator sub-assembly

Does not come on

SAE Code: P26FE

Perform the following operation to check that the 2-system exhaust system is operating correctly.

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the GTS on.
  4. Enter the following menus: Powertrain / Engine / Active Test / Control the ExhaustSwitching Valve Position / DataList / Exhaust Switching Valve Position Sensor Voltage.

    Click here 2023 - 2025 MY GR Corolla [09/2022 -        ]; G16E-GTS (ENGINE CONTROL): SFI SYSTEM: DATA LIST / ACTIVE TEST

    NOTICE:

    Make sure the following conditions are met when performing the Active Test.

    • Ignition switch ON.
  5. When the ignition switch is ON, read the Data List when performing the Active Test.

    Standard:

    GTS Operation

    Data List (Exhaust Switching Valve Position Sensor Voltage)

    0% to 100%

    The value of the Data List item (Exhaust Switching Valve Position Sensor Voltage) constantly changes in accordance with the Active Test.

MONITOR DESCRIPTION

If the value of the exhaust pipe gas control actuator sub-assembly (opening angle sensor) is less than the threshold for 14.5 seconds or more even when there is an exhaust change valve open instruction from the ECM, the ECM stores a DTC.

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.

PERFORM ACTIVE TEST USING GTS (CONTROL THE EXHAUST SWITCHING VALVE POSITION)

(a) Turn the ignition switch to ON.

(b) When the ignition switch is ON, read the Data List when performing the Active Test.

Powertrain > Engine > Active Test

Active Test Display

Control the Exhaust Switching Valve Position

Data List Display

Exhaust Switching Valve Position Sensor Voltage

Standard:

GTS Operation

Data List (Exhaust Switching Valve Position Sensor Voltage)

0% to 100%

The value of the Data List item (Exhaust Switching Valve Position Sensor Voltage) constantly changes in accordance with the Active Test.
OK

CHECK FOR INTERMITTENT PROBLEMS

NG

2.

INSPECT EXHAUST TAILPIPE ASSEMBLY (EXHAUST CHANGE VALVE)

Click here 2023 - 2025 MY GR Corolla [09/2022 -        ]; G16E-GTS (INTAKE / EXHAUST): EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY: INSPECTION

OK

REPLACE EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY

NG

REPLACE EXHAUST TAILPIPE ASSEMBLY (EXHAUST CHANGE VALVE)