Toyota Tundra. Manual — part 1529

P0117:

TYPICAL MALFUNCTION THRESHOLDS - P0117

P0118:

TYPICAL MALFUNCTION THRESHOLDS - P0118

COMPONENT OPERATING RANGE

COMPONENT OPERATING RANGE

WIRING DIAGRAM

ECT sensor voltage

Less than 0.14 V, or more than 4.91 V

ECT sensor voltage [ECT]

Less than 0.14 V [More than 140°C (284°F)]

ECT sensor voltage [ECT]

More than 4.91 V [Less than -40°C (-40°F)]

ECT sensor voltage [ECT]

0.14 to 4.91 V [-40 to 140°C (-40 to 284°F)]

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Fig. 79: Engine Coolant Temperature Sensor - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

Read freeze frame data using the Techstream. Freeze frame data records the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

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.

1. READ OUTPUT DTC

a. Connect the Techstream to the DLC3.

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

c. Enter the following menus: Powertrain/Engine and ECT/Trouble Codes.

d. Read DTCs.

Result

RESULT REFERENCE

B: Go to step 5

C: Go to step 3

A: Go to next step.

2. READ VALUE USING TECHSTREAM (ENGINE COOLANT TEMPERATURE)

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/Data List/All Data/Coolant Temp.

e. Read the value displayed on the Techstream.

Standard value:

Between 80 and 100°C (167 and 212°F) with warm engine.

Result

RESULT REFERENCE

HINT:

Result

Proceed to

P0115 is output

A

P0117 is output

B

P0118 is output

C

Temperature Displayed

Proceed to

-40°C (-40°F)

A

140°C (284°F) or higher

B

Between 80 and 100°C (176 and 212°F)

C

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra



If there is an open circuit, the Techstream indicates -40°C (-40°F).



If there is a short circuit, the Techstream indicates 140°C (284°F) or higher.

B: Go to step 5

C: CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR
INTERMITTENT PROBLEMS )

A: Go to next step.

3. READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS)

a. Disconnect the D28 ECT sensor connector.

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra