Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000029BWU
Model Year Start: 2023 Model: Corolla Hatchback Prod Date Range: [11/2022 -           ]
Title: M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P01152A; Engine Coolant Temperature Sensor 1 Signal Stuck in Range; 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]

DTC

P01152A

Engine Coolant Temperature Sensor 1 Signal Stuck in Range

DESCRIPTION

Refer to DTC P011511.

Click here 2020 - 2023 MY Corolla Corolla Hatchback [03/2019 - 03/2023]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P011511; Engine Coolant Temperature Sensor 1 Circuit Short to Ground+ 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P011511; Engine Coolant Temperature Sensor 1 Circuit Short to Ground+

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P01152A

Engine Coolant Temperature Sensor 1 Signal Stuck in Range

Either of the following conditions is met (2 trip detection logic):

  • When engine is started cold and warmed up, the engine coolant temperature sensor value does not change.
  • After the warmed up engine is stopped and then next cold engine start is performed, the engine coolant temperature sensor value does not change.
  • Water inlet with thermostat sub-assembly
  • Engine coolant temperature sensor

Comes on

DTC stored
  • SAE Code: P0116
  • DTC for Mexico Models: Applies

MONITOR DESCRIPTION

Engine Coolant Temperature Sensor Cold Start Monitor

When a cold engine start is performed and then the engine is warmed up, if the engine coolant temperature sensor value does not change, it is determined that a malfunction has occurred. If this is detected in 2 consecutive driving cycles, the MIL is illuminated and this DTC is stored.

Engine Coolant Temperature Sensor Soak Monitor

If the engine coolant temperature sensor value does not change after the warmed up engine is stopped and then the next cold engine start is performed, it is determined that a malfunction has occurred. If this is detected in 2 consecutive driving cycles, the MIL is illuminated and this DTC is stored.

MONITOR STRATEGY

Related DTCs

P0116: Engine coolant temperature sensor rationality (cold start monitor)

P0116: Engine coolant temperature sensor rationality (soak monitor)

Required Sensors/Components (Main)

Engine coolant temperature sensor

Required Sensors/Components (Related)

-

Frequency of Operation

Once per driving cycle

Duration

10 seconds: Soak monitor

-: Cold start monitor

MIL Operation

2 driving cycles

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Cold Start Monitor

All of the following conditions are met

-

Battery voltage

10.5 V or higher

Time after engine start

1 second or more

Engine coolant temperature at engine start

Less than 60°C (140°F)

Soak time

0 second or more: except Mexico Models

5 hours or more: for Mexico Models

Accumulated mass air flow

3928 g or more

Engine

Running

Fuel cut

Off

Intake air temperature sensor circuit fail (P0112, P0113)

Not detected

Engine coolant temperature sensor circuit fail (P0117, P0118)

Not detected

Engine water pump circuit fail (P26CA, P26CC, P26CD)

Not detected

Difference between engine coolant temperature at engine start and intake air temperature

Less than 40°C (72°F)

Soak Monitor

All of the following conditions are met

-

Battery voltage

10.5 V or higher

Engine

Running

Soak time

5 hours or more

Either of the following conditions is met

1 or 2

1. Engine coolant temperature

60°C (140°F) or higher

2. Accumulated mass air flow

7856 g or more

Intake air temperature sensor circuit fail (P0112, P0113)

Not detected

Engine coolant temperature sensor circuit fail (P0117, P0118)

Not detected

Soak timer fail (P2610)

Not detected

Engine water pump circuit fail (P26CA, P26CC, P26CD)

Not detected

TYPICAL MALFUNCTION THRESHOLDS

Cold Start Monitor

Engine coolant temperature sensor value change

Less than 5°C (9°F): except Mexico Models

Less than 1.25°C (2°F): for Mexico Models

Soak Monitor

Difference between current engine coolant temperature sensor value and previous engine coolant temperature sensor value when engine stopped

Less than 5°C (9°F) (Varies with engine coolant temperature of last trip engine stop): except Mexico Models

Less than 1.25°C (2°F): for Mexico Models

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the Techstream 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 [A].
  7. Turn the Techstream on.
  8. Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.
  9. Check that the engine coolant temperature is 60°C (140°F) or less.
  10. Start the engine and idle it for 5 minutes or more [B].

    HINT:

    • If the engine coolant temperature does not change by 5°C (9°F) or higher, the engine coolant temperature sensor is malfunctioning. It is not necessary to continue this procedure. (except Mexico Models)
    • If the engine coolant temperature does not change by 1.25°C (2°F) or higher, the engine coolant temperature sensor is malfunctioning. It is not necessary to continue this procedure. (for Mexico Models)
  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: P01152A.
  15. Check the DTC judgment result.

    Techstream 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 [D] through [E].
    • [A] to [C]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
  16. Drive the vehicle at 40 km/h (25 mph) or more for a total of 5 minutes or more [D].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    HINT:

    In the event of the drive pattern being interrupted (possibly due to factors such as traffic conditions), the drive pattern can be resumed.

  17. Check the DTC judgment result again [E].

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.
    • [A] to [E]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

CAUTION / NOTICE / HINT

HINT:

  • If any of DTCs P011511, P011515 or P012500 are output simultaneously with DTC P01152A, the engine coolant temperature sensor may have an open or a short circuit. Troubleshoot those DTCs first.
  • When the DTC is output, check the engine coolant temperature using the Techstream. Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature. If the Coolant Temperature value is lower than the actual engine coolant temperature, the engine coolant temperature sensor circuit may be malfunctioning. In this case, check the wire harnesses and connectors (and those connections) between the ECM and the engine coolant temperature sensor first.
  • 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P01152A)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC P01152A is output

A

DTC P01152A and other DTCs are output

B

HINT:

If any DTCs other than P01152A are output, troubleshoot those DTCs first.

B

GO TO DTC CHART 2023 MY Corolla Corolla Hatchback [11/2022 - 03/2023]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART

A

2.

INSPECT WATER INLET WITH THERMOSTAT SUB-ASSEMBLY

(a) Inspect the water inlet with thermostat sub-assembly (thermostat opening temperature).

Click here 2023 - 2025 MY Corolla Corolla Hatchback [09/2022 -        ]; M20A-FKS (COOLING): THERMOSTAT (w/ Cooling Fan ECU): INSPECTION

HINT:

Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

OK

REPLACE ENGINE COOLANT TEMPERATURE SENSOR 2023 MY Corolla Corolla Hatchback [11/2022 - 03/2023]; M20A-FKS (ENGINE CONTROL): ENGINE COOLANT TEMPERATURE SENSOR: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; M20A-FKS (ENGINE CONTROL): ENGINE COOLANT TEMPERATURE SENSOR: REMOVAL

NG

REPLACE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY