Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VIC2
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: 2GR-FE (ENGINE CONTROL): SFI SYSTEM: P0111; Intake Air Temperature Sensor 1 Circuit Range / Performance; 2016 MY Sienna [12/2015 - 08/2016]

DTC

P0111

Intake Air Temperature Sensor 1 Circuit Range / Performance

DESCRIPTION

  • The intake air temperature sensor, in the mass air flow meter, 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 becomes low, the resistance of the thermistor increases. When the temperature becomes high, the resistance drops. 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 which is located inside the ECM.
  • 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.

DTC No.

DTC Detection Condition

Trouble Area

P0111

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

  • The intake air temperature rise is small, from the previous trip warm-up to the following trip
  • When the change in the intake air temperature after engine start is less than the threshold value

Mass air flow meter

MONITOR DESCRIPTION

The ECM performs OBD II monitoring based on the values from the intake air temperature sensor. If there is no change of the sensor value within the normal range, the ECM will not be able to perform OBD II monitoring or will misdiagnose that there is a malfunction in the sensor. The ECM detects that the intake air temperature sensor value is stuck by monitoring the sensor after the ignition switch is turned off or after the engine is started.

MONITOR STRATEGY

Related DTCs

P0111: Intake air temperature sensor rationality (After engine stop)

P0111: Intake air temperature sensor rationality (After cold engine start)

Required Sensors/Components (Main)

Intake air temperature sensor

Required Sensors/Components (Related)

-

Frequency of Operation

Once per driving cycle

Duration

-

MIL Operation

2 driving cycles

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

All

Monitor runs whenever following DTCs are not present

None

After Engine Stop

All of the following conditions are met

-

Time after engine start

10 seconds or more

Battery voltage

10.5 V or higher

Engine coolant temperature at ECM started by internal engine off timer

-40°C (-40°F) or higher

Engine coolant temperature before engine stop

70°C (158°F) or higher

Time that mass air flow is low before engine stop

35 minutes or more

Accumulated mass air flow amount in previous driving cycle

2906 g or more

Key off duration

30 minutes

Intake air temperature sensor circuit fail (P0112, P0113)

Not detected

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

Not detected

Mass air flow sensor circuit fail (P0102, P0103)

Not detected

After Cold Engine Start

All of the following conditions are met

-

Key-off duration

5 hours or more

Time after engine start

10 seconds or more

Engine coolant temperature

70°C (158°F) or more

Accumulated mass air flow amount

2906 g or more

One of the following conditions 1 or 2 is met:

-

1. Duration while engine load is low

120 seconds or more

2. Duration while engine load is high

10 seconds or more

Intake air temperature sensor circuit fail (P0112, P0113)

Not detected

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

Not detected

Mass air flow sensor circuit fail (P0102, P0103)

Not detected

TYPICAL MALFUNCTION THRESHOLDS

After Engine Stop

Intake air temperature change

Less than 1°C (1.8°F)

After Cold Engine Start

Intake air temperature change

Less than 1°C (1.8°F)

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR ).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the Techstream on [A].
  6. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].
  7. Idle the engine for 5 minutes or more [C].

    HINT:

    During steps [A] through [C], if the change in the intake air temperature is less than 1°C (1.8°F), the intake air temperature sensor (mass air flow meter) is malfunctioning. It is not necessary to continue this procedure.

  8. Enter the following menus: Powertrain / Engine / Trouble Codes [D].
  9. Read pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  11. Input the DTC: P0111.
  12. 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 ABNORMAL, the system has a malfunction.
    • If the result shows INCOMPLETE or N/A, perform steps [E] and [F].
  13. Drive the vehicle at 40 km/h (25 mph) or more for a total of 5 minutes or more [E].

    CAUTION:

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

  14. Check the DTC judgment result again [F].

    HINT:

    If the judgment result shows INCOMPLETE or N/A, perform steps [E] and [F] again.

  15. If no pending DTC is output, perform a universal trip and check for permanent DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (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.

WIRING DIAGRAM

Refer to DTC P0112 (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: P0112,P0113; Intake Air Temperature Circuit Low Input+ ).

CAUTION / NOTICE / HINT

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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0111)

(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.

Result

Result

Proceed to

DTC P0111 and other DTCs are output

A

DTC P0111 is output

B

HINT:

  • If any DTCs other than P0111 are output, troubleshoot those DTCs first.
  • Perform "Inspection After Repair" after replacing the mass air flow meter (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).
A

GO TO DTC CHART

B

REPLACE MASS AIR FLOW METER