Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Engine Coolant Bypass Valve Circuit Short to Ground (P268111,P268115)

Toyota Corolla Cross (2022-2024) Service Manual / Engine & Hybrid System / M20a-fks (engine Control) / Sfi System / Engine Coolant Bypass Valve Circuit Short to Ground (P268111,P268115)

DESCRIPTION

The flow shutting valve (for heater control) used for the variable cooling system is a magnet type valve that is closed when the engine is warming up to prevent coolant from flowing through the heater passage which reduces engine warm up time.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

P268111

Engine Coolant Bypass Valve Circuit Short to Ground

All of the following conditions are met (1 trip detection logic).

  • An open signal is being sent from the ECM to the flow shutting valve (for heater control).
  • Current operating state and target operating state differ for 3 seconds or more continuously.
  • Open or short in flow shutting valve (for heater control) circuit
  • Flow shutting valve (for heater control)
  • ECM

Does not come on

  • SAE Code: P2682
  • DTC for Mexico Models: Applies

P268115

Engine Coolant Bypass Valve Circuit Short to Battery or Open

All of the following conditions are met (1 trip detection logic).

  • A close signal is being sent from the ECM to the flow shutting valve (for heater control).
  • Current operating state and target operating state differ for 3 seconds or more continuously.
  • Open or short in flow shutting valve (for heater control) circuit
  • Flow shutting valve (for heater control)
  • ECM

Does not come on

  • SAE Code: P2683
  • DTC for Mexico Models: Applies
Related Data List

DTC No.

Data List

P268111

P268115

Coolant Temperature

Coolant Water Route Switching Valve

MONITOR DESCRIPTION

If the ignition switch is ON or the engine is running and the current operating state and target operating state of the flow shutting valve (for heater control) do not match, the ECM determines that there is an open or short in the flow shutting valve (for heater control) circuit and stores a DTC.

CONFIRMATION DRIVING PATTERN

HINT:

Make sure to perform this procedure when the engine coolant temperature is between 5 and 40°C (41 and 104°F) and the difference between the engine coolant temperature and intake air temperature is within 10°C (18°F) or less.

  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. Enter the following menus: Powertrain / Engine / Active Test / Activate the Coolant Water Route Switching Valve.
  9. Perform the Active Test Activate the Coolant Water Route Switching Valve, select "Close" and wait for 3 seconds or more.
  10. Perform the Active Test Activate the Coolant Water Route Switching Valve, select "Open" and wait for 3 seconds or more.
  11. Enter the following menus: Powertrain / Engine / Trouble Codes.
  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: P268111 or P268115.
  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 the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

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 (POWER SOURCE OF FLOW SHUTTING VALVE (FOR HEATER CONTROL))

*a

Front view of wire harness connector

(to Flow Shutting Valve (for Heater Control))

(a) Disconnect the flow shutting valve (for heater control) 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

C50-2 - Body ground

Ignition switch ON

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - FLOW SHUTTING VALVE (FOR HEATER CONTROL))

OK

2.

INSPECT FLOW SHUTTING VALVE (FOR HEATER CONTROL)

Click here

NG

REPLACE FLOW SHUTTING VALVE (FOR HEATER CONTROL)

OK

3.

CHECK HARNESS AND CONNECTOR (FLOW SHUTTING VALVE (FOR HEATER CONTROL) - ECM)

(a) Disconnect the flow shutting valve (for heater control) 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

C50-1 - C76-42 (WSV1)

Always

Below 1 Ω

C50-1 or C76-42 (WSV1) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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