Toyota Tundra (2015 year). Manual — part 1896

A

malfunctions are detected. 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 DTC.

Result

RESULT

PROCEED TO

P0116 is output

A

P0116 and other DTCs are output

B

B

GO TO DTC CHART

2.

INSPECT THERMOSTAT

(a) Remove the thermostat

.

80 to 84°C (176 to 183°F)

HINT:

In addition to the above check, confirm that the valve is completely closed when the temperature is

below the standard.

(c) Reinstall the thermostat

.

HINT:

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

.

NG

REPLACE THERMOSTAT

OK

REPLACE ENGINE COOLANT TEMPERATURE

SENSOR

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0116; Engin...

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0116; Engin...

Last Modified: 9-16-2014

6.6 C

Doc ID: RM0000010BK0IMX

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P011B; Engine Coolant Temperature / Intake Air

Temperature Correlation; 2015 MY Tundra [08/2014 - ]

DTC

P011B

Engine Coolant Temperature / Intake Air Temperature Correlation

DESCRIPTION

The engine has two temperature sensors, an Engine Coolant Temperature (ECT) sensor and an Intake Air

Temperature (IAT) sensor, to detect the temperature while the engine is in operation. A thermistor, whose

resistance value varies according to the temperature, is built into each sensor. When the temperature is low,

output from the sensors, the ECM determines the fuel injection time and the ignition timing to control the

engine.

DTC

CODE

DTC DETECTION CONDITION

TROUBLE AREA

P011B

a.

7 hours or more have elapsed from engine stop on the

previous trip.

b.

15 seconds*1 or 102 seconds*2 after a cold engine start.

c.

The minimum Intake Air Temperature (IAT) after the engine

starts is higher than -10°C (14°F).

d.

The average Engine Coolant Temperature (ECT) before the

engine starts is higher than -10°C (14°F).

e.

f.

IAT

sensor

ECT

sensor

ECM

*1: for 100 L (26.4 US gal) Fuel Tank

*2: for 144 L (38 US gal) Fuel Tank

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P011B; Engin...

HINT:

MONITOR DESCRIPTION

The ECM monitors the difference between the Engine Coolant Temperature (ECT) and the Intake Air

Temperature (IAT) when the engine is started cold to detect the engine temperature conditions accurately.

The monitor runs when the engine started cold after 7 hours or more have elapsed since the engine was

stopped (ignition switch turned off) on the previous trip. If the difference between the ECT and the IAT on a

cold start exceeds 25°C (45°F), the ECM interprets this as a malfunction in the ECT sensor circuit and IAT

sensor circuit, and stores the DTC.

MONITOR STRATEGY

Related DTCs

P011B: Engine Coolant Temperature (ECT) / Intake Air Temperature

(IAT) sensor correlation

Required Sensors/Components

(Main)

ECT / IAT sensor

Required Sensors/Components

(Related)

-

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P011B; Engin...