Toyota Tundra (2015 year). Manual — part 1890

OK

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.

CHECK HARNESS AND CONNECTOR (SENSOR GROUND)

(a) Disconnect the D7 MAF meter connector.

(b) Measure the resistance according to the value(s) in the

table below.

Standard resistance:

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

D7-2 (E2G) - Body ground

Always

Below 1 Ω

HINT:

Perform "Inspection After Repair" after replacing the mass air

flow meter

.

NG

REPLACE ECM

OK

REPLACE MASS AIR FLOW METER

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0102,P0103...

Last Modified: 9-16-2014

6.6 C

Doc ID: RM000001WPH096X

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0111; Intake Air Temperature Sensor 1 Circuit

Range / Performance; 2015 MY Tundra [08/2014 - ]

DTC

P0111

Intake Air Temperature Sensor 1 Circuit Range / Performance

DESCRIPTION

The Intake Air Temperature (IAT) sensor, mounted on the Mass Air Flow (MAF) meter, monitors the

IAT. The IAT sensor has a built-in thermistor with a resistance that varies according to the temperature

voltage changes (See Fig. 1).

changes, according to changes in the IAT, 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

CODE

DTC DETECTION CONDITION

TROUBLE

AREA

P0111

in Intake Air Temperature (IAT) sensor output below threshold.

1.

During engine warming up after cold engine starts, change in IAT sensor

output below threshold.

2.

Mass air flow

meter

MONITOR DESCRIPTION

After warmed engine stop

The ECM monitors the intake air temperature variation in the period from when the engine was warmed up on

the previous trip until the next engine start. If the change in engine coolant temperature sensor output is less

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0111; Intake ...

than the threshold, it is determined that a malfunction has occurred in the intake air temperature sensor.

When this is detected, the MIL is illuminated and the DTC is set.

After cold engine start

The monitor runs when the engine is started cold after 5 hours or more have elapsed since the engine

stopped. If the intake air temperature sensor output variation until the engine has warmed up completely is

less than the threshold, it is determined that a malfunction has occurred in the intake air temperature sensor.

When this is detected in 2 consecutive driving cycles, the MIL is illuminated and the DTC is set.

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 (IAT) sensor

Required Sensors/Components

(Related)

-

Duration

10 seconds or more

MIL Operation

2 driving cycles

TYPICAL ENABLING CONDITIONS

All:

Monitor runs whenever following DTCs are not stored

None

After engine stop:

Time after engine start

10 seconds or more

Battery voltage

10.5 V or more

IAT sensor circuit fail (P0112, P0113)

Not detected

ECT sensor circuit fail (P0115, P0117, P0118)

Not detected

MAF sensor circuit fail (P0102, P0103)

Not detected

Soak timer circuit fail (P2610)

Not detected

ECT change since engine stop

-40°C (-40°F) or more

ECT before engine stop

70°C (158°F) or more

Accumulated MAF amount before engine stop

5752 g or more

Key-off duration

30 minutes

After cold engine start:

Key-off duration

5 hours

Time after engine start

10 seconds or more

IAT sensor circuit fail (P0112, P0113)

Not detected

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0111; Intake ...

ECT sensor circuit fail (P0115, P0117, P0118)

Not detected

MAF sensor circuit fail (P0102, P0103)

Not detected

Soak timer circuit fail (P2610)

Not detected

ECT

70°C (158°F) or more

Accumulated MAF amount

5752 g or more

1. Duration while engine load is low

120 seconds or more

2. Duration while engine load is high

10 seconds or more

TYPICAL MALFUNCTION THRESHOLDS

After engine stop:

IAT change

Less than 1°C (2°F)

After cold engine start:

IAT change

Less than 1°C (2°F)

CONFIRMATION DRIVING PATTERN

Connect the Techstream to the DLC3.

1.

Turn the ignition switch to ON and turn the Techstream on.

2.

Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).

3.

Turn the ignition switch off and wait for at least 30 seconds.

4.

Turn the ignition switch to ON and turn the Techstream on [A].

5.

Start the engine and warm it up until the ECT reaches 75°C (167°F) or higher [B].

6.

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 (MAF meter) is malfunctioning. It is not necessary
to continue this procedure.

7.

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0111; Intake ...