Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001NLXR
Model Year Start: 2021 Model: Corolla Prod Date Range: [04/2020 - 09/2022]
Title: 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P011011; Intake Air Temperature Sensor 1 Bank 1 Circuit Short to Ground; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]

DTC

P011011

Intake Air Temperature Sensor 1 Bank 1 Circuit Short to Ground

DESCRIPTION

The intake air temperature sensor, which is built into the mass air flow meter sub-assembly, monitors the intake air temperature. The intake air temperature sensor has a built-in thermistor with a resistance that varies according to the temperature of the intake air. When the intake air temperature is low, the resistance of the thermistor increases. When the temperature is high, the resistance decreases. These variations in resistance are transmitted to the ECM as voltage changes (see Fig. 1).

The intake air temperature sensor is powered by a 5 V supply from the THA terminal of the ECM, via resistor R.

Resistor R and the intake air temperature sensor are connected in series. When the resistance value of the intake air temperature sensor changes, according to changes in the intake air temperature, the voltage at terminal THA also varies. Based on this signal, the ECM increases the fuel injection volume when the engine is cold to improve driveability.

HINT:

When DTC P011011 is stored, the ECM enters fail-safe mode. During fail-safe mode, the intake air temperature is estimated to be 20°C (68°F) by the ECM. Fail-safe mode continues until a pass condition is detected.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P011011

Intake Air Temperature Sensor 1 Bank 1 Circuit Short to Ground

Diagnosis condition:

  • Power switch on (IG)

Abnormal condition:

  • The intake air temperature sensor output voltage is less than 0.176 V*1 or 0.146V*2.

Malfunction time:

  • 0.5 seconds or more

Trip logic:

  • 1 trip detection logic

Detection conditions:

  • Continuous

Sensors/components used for detection:

  • Intake air temperature sensor
  • Short in intake air temperature sensor circuit
  • Intake air temperature sensor (mass air flow meter sub-assembly)
  • ECM

Comes on

DTC stored

  • SAE Code: P0112
  • DTC for Mexico, Euro OBD models: Applies
  • *1: except Mexico, Euro OBD models
  • *2: for Mexico, Euro OBD models

HINT:

When this DTC is output, check the intake air temperature in the Data List. Enter the following menus: Powertrain / Engine / Data List / Intake Air Temperature.

except Mexico, Euro OBD models

DTC No.

Intake Air Temperature

Malfunction

P011011

Higher than 128°C (262°F)

Short to ground in THA circuit

for Mexico, Euro OBD models

DTC No.

Intake Air Temperature

Malfunction

P011011

Higher than 138°C (280°F)

Short to ground in THA circuit

If the Data List value is normal it may be due to a temporary recovery from the malfunction condition. Check for intermittent problems.

Click here 2020 - 2025 MY Corolla Corolla HV [01/2019 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: CHECK FOR INTERMITTENT PROBLEMS

MONITOR DESCRIPTION

When the power switch is turned on (IG) and the output voltage of the intake air temperature sensor is less than 0.176 V*1 or 0.146 V*2 for 0.5 seconds or more, the ECM determines that the intake air temperature sensor circuit is malfunctioning and illuminates the MIL and stores a DTC.

  • *1: except Mexico, Euro OBD models
  • *2: for Mexico, Euro OBD models

MONITOR STRATEGY

Related DTCs

P0112: Intake air temperature sensor range check (low voltage)

Required Sensors/Components (Main)

Intake air temperature sensor (mass air flow meter sub-assembly)

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

0.5 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored

None

Both of the following conditions are met

-

Auxiliary battery voltage

8 V or higher

Power switch

On (IG)

TYPICAL MALFUNCTION THRESHOLDS

except Mexico, Euro OBD models

Intake air temperature sensor voltage [Intake air temperature]

Less than 0.176 V [Higher than 128°C (262°F)]

for Mexico, Euro OBD models

Intake air temperature sensor voltage [Intake air temperature]

Less than 0.142 V [Higher than 138°C (280°F)]

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 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

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

    Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG) [A].
  7. Turn the Techstream on.
  8. Wait 0.5 seconds or more [B].
  9. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
  10. 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.
  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  12. Proceed to the next screen and enter the DTC to be checked.
  13. 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.
    • [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 auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Vehicle Control History may be stored in the hybrid vehicle control ECU if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the freeze frame data and Vehicle Control History can be useful for troubleshooting.

    - for Nickel Metal Hydride Battery: Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): VEHICLE CONTROL HISTORY

    - for Lithium-ion Battery: Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with P610): VEHICLE CONTROL HISTORY

    (Select Powertrain in Health Check and then check the time stamp data.)

    Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

    - for Nickel Metal Hydride Battery: Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): VEHICLE CONTROL HISTORY

    - for Lithium-ion Battery: Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with P610): VEHICLE CONTROL HISTORY

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.

READ VALUE USING TECHSTREAM (INTAKE AIR TEMPERATURE)

*1

Intake Air Temperature Sensor

*2

ECM

(a) Disconnect the intake air temperature sensor connector.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Data List / Intake Air Temperature.

Powertrain > Engine > Data List

Tester Display

Intake Air Temperature

(f) According to the display on the Techstream, read the Data List.

OK:

Techstream Display

Specified Condition

Intake Air Temperature

-40°C (-40°F)

HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

OK

REPLACE MASS AIR FLOW METER SUB-ASSEMBLY

NG

2.

CHECK HARNESS AND CONNECTOR (INTAKE AIR TEMPERATURE SENSOR - ECM)

(a) Disconnect the intake air temperature sensor 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

C25-4 (THA) or C77-138 (THA) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR