Toyota Tundra Service Manual: Transmission Fluid Temperature Sensor "A" Performance (P0711)

DESCRIPTION

The ATF temperature sensor converts the fluid temperature into a resistance value for use by the ECM.

The ECM applies a voltage to the temperature sensor through terminal THO1 of the ECM.

The sensor resistance changes with the ATF temperature. As the temperature becomes higher, the sensor resistance decreases.

One terminal of the sensor is grounded so that the sensor resistance decreases and the voltage goes down as the temperature becomes higher.

The ECM calculates the fluid temperature based on the voltage signal.

DTC Code

DTC Detection Condition

Trouble Area

P0711

Either condition is met (2-trip detection logic):

  • (a) Certain monitor enabling conditions are met and the ATF temperature is below 20°C (68°F).
  • (b) Certain monitor enabling conditions are met and the ATF temperature is 110°C (230°F) or higher.

Transmission wire (No. 1 ATF temperature sensor)

MONITOR DESCRIPTION

This DTC indicates that there is a problem with output from the Automatic Transmission Fluid (ATF) temperature sensor and that the sensor itself is defective. The ATF temperature sensor converts the ATF temperature to an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature and detects an open or short in the ATF temperature sensor circuit or a fault in the ATF temperature sensor.

After running the vehicle for a certain period, the ATF temperature should increase. If the ATF temperature is below 20°C (68°F) after running the vehicle for a certain period, the ECM interprets this as a fault, turns on the MIL and stores the DTC.

When the ATF temperature is 105°C (221°F) or more and the engine coolant temperature takes 10 seconds or more to reach 60°C (140°F) after a cold start, the ECM also determines this as a fault, turns on the MIL and stores the DTC.

MONITOR STRATEGY

Related DTCs

P0711: ATF temperature sensor/Rationality fault diagnostics

Required sensors/Components

ATF temperature sensor

Frequency of operation

Continuous

Duration

Condition (A), (B), (C) and (D): 3 seconds

Condition (E): Continuous

MIL operation

2 driving cycles

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

All

The monitor will run whenever the following DTCs are not present

P0712, P0713, P2740, P2742, P2743 (ATF temperature sensor "A" circuit)

P0115, P0116, P0117, P0118, P011B (ECT (Engine Coolant Temperature) sensor circuit)

P0110, P0111, P0112, P0113 (IAT (Intake air temperature) sensor circuit)

P2610 (Soak timer circuit)

Condition (A)

Duration time from engine start

12 seconds or more

ECT

-15°C (5°F) or higher

Permission flag for ATF temperature rationality check

ON

Time after engine start except for continuing shift position "N" or "P"*2

10 minutes or more

Accumulated driving time*1

75 seconds or more

Driving distance after engine start*3

4.7 km (2.9 miles) or more

ECT (12 seconds after engine start)

15°C (59°F) or higher

IAT*4

15°C (59°F) or higher

Soak time

5 hours or more

Condition (B)

Duration time from engine start

12 seconds or more

ECT

-15°C (5°F) or higher

Permission flag for ATF temperature rationality check

ON

Time after engine start except for continuing shift position "N" or "P"*2

21 minutes and 40 seconds or more

Accumulated driving time*1

140 seconds or more

Driving distance after engine start*3

9.0 km (5.6 miles) or more

ECT (12 seconds after engine start)

-10°C (14°F) or higher

IAT*4

-10°C (14°F) or higher

Condition (C)

Duration time from engine start

12 seconds or more

ECT

-15°C (5°F) or higher

Permission flag for ATF temperature rationality check

ON

Time after engine start except for continuing shift position "N" or "P"*2

30 minutes or more

Accumulated driving time*1

400 seconds or more

Driving distance after engine start*3

16.0 km (9.9 miles) or more

ECT (12 seconds after engine start)

-15°C (5°F) or higher

IAT*4

-15°C (5°F) or higher

Condition (D)

Duration time from engine start

12 seconds or more

ECT

-15°C (5°F) or higher

Permission flag for ATF temperature rationality check

ON

Time after engine start except for continuing shift position "N" or "P"*2

55 minutes or more

Accumulated driving time*1

750 seconds or more

Driving distance after engine start*3

27.0 km (16.8 miles) or more

Condition (E)

Duration time for ECT to reach 60°C (140°F)

10 seconds or more

ATF temperature (12 seconds after engine start)

110°C (230°F) or higher

ECT (12 seconds after engine start)

Below 35°C (95°F)

HINT:

  • *1: Following conditions are met

    Engine speed - Turbine speed

    50 rpm or more

    Output speed

    400 rpm or more

    Throttle valve opening angle

    5.5% or more

    Shift position

    Not "N" or "P"

    Engine

    Starting

    However, accumulated driving time is cleared

    -

    When following condition met

    -

    Duration time from shift position "N" or "P"

    5 minutes or more

  • *2: Time after engine start is cleared when following condition met

    Duration time from shift position "N" or "P"

    5 minutes or more

  • *3: Driving distance is cleared when following condition met

    Duration time from shift position "N" or "P"

    5 minutes or more

  • *4: IAT is measured when either of following conditions met

    12 sec. after engine start

    -

    Duration time from shift position "N" or "P"

    5 minutes or more

TYPICAL MALFUNCTION THRESHOLDS

When either condition below is met: Condition (A), (B), (C), (D) or (E)

Condition (A), (B), (C) and (D)

ATF temperature

Below 20°C (68°F)

Condition (E)

ATF temperature

110°C (230°F) or higher

COMPONENT OPERATING RANGE

Condition (A), (B), (C), (D) and (E)

ATF temperature

20°C (68°F) or higher, and below 110°C (230°F)

CAUTION / NOTICE / HINT

NOTICE:

  • Perform the universal trip to clear permanent DTCs (See page ).
  • If DTCs P0711 and P2610 are output simultaneously, confirm that the ATF temperature is as specified in "Normal Condition" using the Techstream first. When the ATF temperature is as specified in "Normal Condition", perform troubleshooting for DTC P2610 (See page ).

1. DATA LIST

HINT:

Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

NOTICE:

In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

(a) Warm up the engine.

(b) Turn the ignition switch off.

(c) Connect the Techstream to the DLC3.

(d) Turn the ignition switch to ON.

(e) Turn the Techstream on.

(f) Enter the following menus: Powertrain / Engine and ECT / Data List.

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

Engine and ECT

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

A/T Oil Temperature 1

No. 1 ATF temperature sensor value/

Min.: -40°C (-40°F)

Max.: 150°C (302°F)

  • After stall test: Approximately 80°C (176°F)
  • Equal to ambient temperature when engine cold

If the value is -40°C (-40°F) or 150°C (302°F), the No. 1 ATF temperature sensor circuit is open or shorted.

HINT:

When DTC P0712 is output and the Techstream output is 150°C (302°F) or more, there is a short circuit.

When DTC P0713 is output and the Techstream output is -40°C (-40°F), there is an open circuit.

Check the temperature displayed on the tester in order to check if a malfunction exists.

Temperature Displayed

Malfunction

-40°C (-40°F)

Open circuit

150°C (302°F) or more

Short circuit

If a circuit related to the ATF temperature sensor becomes open, P0713 is immediately stored (in 0.5 seconds). When P0713 is stored, P0711 cannot be stored.

It is not necessary to inspect the circuit when P0711 is stored.

PROCEDURE

1.

CHECK DTC OUTPUT (IN ADDITION TO DTC P0711)

(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 DTCs using the Techstream.

Result

Result

Proceed to

Only P0711 is output

A

P0711 and other DTCs are output

B

HINT:

If any other codes besides P0711 are output, perform troubleshooting for those DTCs first.

B

GO TO DTC CHART

A

2.

CHECK TRANSMISSION FLUID LEVEL

(a) Check the transmission fluid level (See page ).

OK:

Automatic transmission fluid level is correct.

OK

REPAIR OR REPLACE TRANSMISSION WIRE

NG

ADD FLUID

    Transmission Range Sensor Circuit Malfunction (PRNDL Input) (P0705)

    Transmission Fluid Temperature Sensor "A" Circuit Low Input (P0712,P0713)

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