- DTC judgment completed
- System normal
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000028LT1 |
| Model Year Start: 2023 | Model: Corolla Hatchback | Prod Date Range: [11/2022 - 03/2023] |
| Title: M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P268111,P268115; Engine Coolant Bypass Valve Circuit Short to Ground; 2023 MY Corolla Corolla Hatchback [11/2022 - 03/2023] | ||
|
DTC |
P268111 |
Engine Coolant Bypass Valve Circuit Short to Ground |
|
DTC |
P268115 |
Engine Coolant Bypass Valve Circuit Short to Battery or Open |
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 |
Memory |
Note |
|---|---|---|---|---|---|---|
|
P268111 |
Engine Coolant Bypass Valve Circuit Short to Ground |
All of the following conditions are met (1 trip detection logic).
|
|
Does not come on |
DTC stored |
|
|
P268115 |
Engine Coolant Bypass Valve Circuit Short to Battery or Open |
All of the following conditions are met (1 trip detection logic).
|
|
Does not come on |
DTC stored |
|
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.
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for at least 30 seconds.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Active Test / Activate the Coolant Water Route Switching Valve.
- Perform the Active Test Activate the Coolant Water Route Switching Valve, select "Close" and wait for 3 seconds or more.
- Perform the Active Test Activate the Coolant Water Route Switching Valve, select "Open" and wait for 3 seconds or more.
- Enter the following menus: Powertrain / Engine / Trouble Codes.
-
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.
- Enter the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P268111 or P268115.
-
Check the DTC judgment result.
Techstream Display
Description
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 Techstream. 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 |
|---|---|---|
|
C146-2 - 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)) |
|
|
2. |
INSPECT FLOW SHUTTING VALVE (FOR HEATER CONTROL) |
(a) Inspect the flow shutting valve (for heater control).
Click here
![2019 - 2025 MY Corolla Corolla Hatchback [06/2018 - ]; M20A-FKS (COOLING): FLOW SHUTTING VALVE (for Heater): INSPECTION](/t3Portal/stylegraphics/info.gif)
| NG |
|
|
|
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 |
|---|---|---|
|
C146-1 - C76-42 (WSV1) |
Always |
Below 1 Ω |
|
C146-1 or C76-42 (WSV1) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|