Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001HT2O
Model Year Start: 2020 Model: Corolla Prod Date Range: [03/2019 - 11/2022]
Title: 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: P0116; Engine Coolant Temperature Circuit Range / Performance; 2020 - 2023 MY Corolla [03/2019 - 11/2022]

DTC

P0116

Engine Coolant Temperature Circuit Range / Performance

DESCRIPTION

Refer to DTC P0115.

Click here 2020 - 2023 MY Corolla [03/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: P0115,P0117,P0118; Engine Coolant Temperature Circuit+

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P0116

Engine Coolant Temperature Circuit Range / Performance

except Mexico Models

  • 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.

for Mexico Models

  • Case 1

    The engine coolant temperature is between -40 and 60°C (-40 and 140°F) when the engine is started, and both of the following conditions are met (2 trip detection logic):

    1. Vehicle driven at varying speeds (accelerated and decelerated).
    2. Engine coolant temperature remains within 3°C (5.4°F) of initial engine coolant temperature.
  • Case 2

    The engine coolant temperature is higher than 60°C (140°F) when the engine is started, and both of the following conditions are met (6 trip detection logic):

    1. Vehicle driven at varying speeds (accelerated and decelerated).
    2. Engine coolant temperature measurements remain within 1°C (1.8°F) of initial engine coolant temperature on 6 successive occasions.
  • Thermostat
  • Engine coolant temperature sensor

Comes on

DTC stored

DTC for Mexico Models

- Applies

MONITOR DESCRIPTION

Engine Coolant Temperature Sensor Cold Start Monitor (except Mexico Models)

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 (except Mexico Models)

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.

Engine Coolant Temperature Sensor High Side Stuck Monitor (for Mexico Models)

The ECM monitors the sensor voltage and uses this value to calculate the engine coolant temperature. If the sensor voltage output deviates from the normal operating range, the ECM interprets this deviation as a malfunction in the engine coolant temperature sensor and stores the DTC.

Examples:

  • When starting the engine and the engine coolant temperature is between -40 and 60°C (-40 and 140°F):

    If after driving for 250 seconds, the engine coolant temperature remains within 3°C (5.4°F) of the starting temperature, the DTC is stored (2 trip detection logic).

  • When starting the engine and the engine coolant temperature is higher than 60°C (140°F):

    If after driving for 250 seconds, the ECM remains within 1°C (1.8°F) of the starting temperature, the DTC is stored (6 trip detection logic).

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

-: Cold start monitor

10 seconds: Soak monitor

MIL Operation

2 driving cycles

6 driving cycles (except Mexico models)

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 seconds or more

Accumulated mass air flow

4283 g or more

Fuel cut

Off

Engine coolant temperature sensor circuit fail (P0115, P0117, P0118, P0125)

Not detected

Intake air temperature sensor circuit fail (P0112, P0113)

Not detected

Thermostat fail (P0128)

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

(a) or (b)

(a) Engine coolant temperature

60°C (140°F) or higher

(b) Accumulated mass air flow

8766 g or more

Engine coolant temperature sensor circuit fail (P0115, P0117, P0118, P0125)

Not detected

Thermostat fail (P0128)

Not detected

Soak timer fail (P2610)

Not detected

TYPICAL MALFUNCTION THRESHOLDS

Cold Start Monitor

Engine coolant temperature sensor value change

Less than 5°C (9°F)

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)

COMPONENT OPERATING RANGE

Engine coolant temperature

Engine coolant temperature sensor value changes in accordance with actual engine coolant temperature

CONFIRMATION DRIVING PATTERN

except Mexico Models

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the Techstream on.
  4. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp.
  5. Check that the engine coolant temperature is 60°C (140°F) or less.
  6. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  7. Turn the ignition switch off and wait for at least 30 seconds.
  8. Turn the ignition switch to ON [A].
  9. Turn the Techstream on.
  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.

  11. Enter the following menus: Powertrain / Engine and ECT / 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 and ECT / Utility / All Readiness.
  14. Input the DTC: P0116.
  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

    N/A
    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE or N/A, perform steps [D] through [E].
  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 shows INCOMPLETE or N/A, perform steps [D] through [E] again.

  18. If no pending DTC is output, perform a universal trip and check for permanent DTCs.

    Click here 2020 - 2022 MY Corolla [03/2019 - 09/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR 2023 MY Corolla [09/2022 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

    HINT:

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTC is output, the system is normal.

for Mexico Models

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the GTS on.
  4. Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.
  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 [A].
  9. Drive the vehicle at varying speeds (accelerated and decelerated 10 times or more) for 5 minutes or more [B].

    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 driving pattern can be resumed.

  10. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
  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 and ECT / Utility / All Readiness.
  13. Input the DTC: P0116.
  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

    N/A
    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.

CAUTION / NOTICE / HINT

HINT:

  • If any of DTCs P0115, P0117, P0118 or P0125 are output simultaneously with DTC P0116, 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 and ECT / Data List / Coolant Temp. If the Coolant Temp 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 P0116)

(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 and ECT / Trouble Codes.

(e) Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result

Proceed to

DTC P0116 is output

A

DTC P0116 and other DTCs are output

B

HINT:

If any DTCs and other than P0116 are output, troubleshoot those DTCs first.

B

GO TO DTC CHART 2020 MY Corolla [03/2019 - 04/2020]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2021 - 2022 MY Corolla [04/2020 - 09/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2023 MY Corolla [09/2022 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART

A

2.

INSPECT THERMOSTAT

(a) Inspect the thermostat (thermostat opening temperature).

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (COOLING): THERMOSTAT: INSPECTION

HINT:

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

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

OK

REPLACE ENGINE COOLANT TEMPERATURE SENSOR 2020 - 2022 MY Corolla [03/2019 - 09/2022]; 2ZR-FAE (ENGINE CONTROL): ENGINE COOLANT TEMPERATURE SENSOR: REMOVAL 2023 MY Corolla [09/2022 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): ENGINE COOLANT TEMPERATURE SENSOR: REMOVAL

NG

REPLACE THERMOSTAT