Toyota Yaris: Sfi System / Engine Oil Pressure Sensor/Switch "A" Signal Stuck High (P052024,P05202A)

• The oil pressure sensor output value differs from the specified value for a given engine speed (P052024).
• The oil pressure sensor output voltage does not change for a certain period of time (P05202A).

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. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off [A].
9. When the vehicle is stationery, gently depress the accelerator pedal until the engine speed increases to 3500 rpm for 1 minute, then release the accelerator pedal to return to the idling speed [B].
10. Repeat step [B] 3 times or more.
11. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
12. 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.
13. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
14. Input the DTC: P052024 or P05202A.
15. 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.
    • If the judgment result is INCOMPLETE, perform steps [B] through [C] again.

HINT:

• When the engine oil pressure and temperature sensor is removed, the engine oil temperature cannot be checked, so refer to "Coolant Temperature".
• Race the engine as necessary to maintain "Coolant Temperature" at 90 to 95°C (194 to 203°F).
• If maintained for 3 minutes or more, the engine oil temperature may exceed 85°C (185°F).

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