Toyota Yaris: Sfi System / ECM/PCM Engine Off Timer Performance Signal Invalid (P261029)

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. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
7. Turn the ignition switch off and wait for at least 15 seconds.
8. Turn the ignition switch to ON.
9. Turn the GTS on.
10. Enter the following menus: Powertrain / Engine / Trouble Codes.
11. 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.
12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
13. Input the DTC: P261029.
14. 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 has a malfunction.

HINT:

• DTC P261029 is set if an internal ECM problem is detected. Diagnostic procedures are not required. ECM replacement is required.
• 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.

Turbocharger/Supercharger Bypass Valve "A" Actuator Stuck Closed (P23AA73)

DESCRIPTION Refer to DTC P003312. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note P23AA73 Turbocharger/Supercharger Bypass Valve "A" Actuator Stuck Closed Either of the following conditions is met (1 trip detection logic)...

O2 Sensor Circuit Range/Performance Bank 1 Sensor 1 Signal Rate of Change Below Threshold (P2A0026)

DESCRIPTION Refer to DTC P003012. Click here HINT: Although the DTC titles say oxygen sensor, this DTC relate to the air fuel ratio sensor (sensor 1)...

Other information:

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Components

C..

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Relay

InspectionINSPECTION PROCEDURE 1. INSPECT ST NO. 1 RELAY (a) Check the resistance. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 3 - 5 Battery voltage not applied to terminals 1 and 2 10 kΩ or higher Battery voltage applied to terminals 1 and 2 Below 1 Ω If the result is not as specified, replace the ST No...