Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Transmission Fluid Temperature Sensor "A" Performance (P0711)

DESCRIPTION

The No. 1 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 No.

DTC Detection Condition

Trouble Area

P0711

Either condition is met: (2 trip detection logic)

  • (a) Certain monitor enabling conditions are met and the No. 1 ATF temperature is below 20°C (68°F)
  • (b) Certain monitor enabling conditions are met and the No. 1 ATF temperature is 110°C (230°F) or higher

No. 1 ATF temperature sensor (transmission wire)

MONITOR DESCRIPTION

This DTC indicates that there is a problem with output signals from the No. 1 ATF temperature sensor and that the sensor itself is defective. The No. 1 ATF temperature sensor converts the ATF temperature into an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature and detects an open or short in the No. 1 ATF temperature sensor circuit or a fault of the No. 1 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 malfunction, illuminates the MIL and stores the DTC.

When the ATF temperature is 110°C (230°F) or higher 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 malfunction, illuminates the MIL and stores the DTC.

MONITOR STRATEGY

Related DTCs

P0711: ATF temperature sensor/Rationality fault diagnostics

Required sensors/Components

ATF temperature sensor (TFT sensor)

Frequency of operation

Continuous

Duration

Condition (A), (B), (C) and (D): 3 sec.

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 stored

P0712, P0713 (TFT (ATF temperature) sensor circuit)

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

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

P0717, P07BF, P07C0 (Turbine speed sensor circuit)

P0722, P077C, P077D (Output speed sensor circuit)

P0335 (Crankshaft position sensor circuit (This condition applies only if using fail-safe))

P0748 (Shift solenoid valve SL1 circuit)

P0778 (Shift solenoid valve SL2 circuit)

P0798 (Shift solenoid valve SL3 circuit)

P2810 (Shift solenoid valve SL4 circuit)

P0327, P0328, P0332, P0333 (KCS (Knock control sensor) circuit)

P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0604, P0606, P060A, P060B, P060D, P060E, P0657, P1607, P2102, P2103, P2111, P2112, P2118, P2119, P2135 (ETCS (Electronic throttle control system))

U0100 (CAN communication system)

P2610 (Soak timer circuit)

TFT (ATF temperature) sensor circuit

Not circuit malfunction

ECT (Engine coolant temperature) sensor circuit

Not circuit malfunction

IAT (Intake air temperature) sensor circuit

Not circuit malfunction

Turbine speed sensor circuit

Not circuit malfunction

Output speed sensor

Not circuit malfunction

Shift solenoid valve SL1 circuit

Not circuit malfunction

Shift solenoid valve SL2 circuit

Not circuit malfunction

Shift solenoid valve SL3 circuit

Not circuit malfunction

Shift solenoid valve SL4 circuit

Not circuit malfunction

KCS (Knock control sensor) circuit

Not circuit malfunction

ETCS (Electronic throttle control system)

Not system down

CAN communication system

Not system down

Soak timer circuit

Not circuit malfunction

Condition (A):

Duration time from engine start

12 sec. or more

ECT

-15°C (5°F) or higher

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

10 min. or more

Accumulated driving time*1

199 sec. or more

Driving distance after engine start*3

4.9 km (3.0 miles) or more

IAT*4

15°C (59°F) or higher

ECT (12 sec. after engine start)

15°C (59°F) or higher

Soak time

5 hours or more

Condition (B):

Duration time from engine start

12 sec. or more

ECT

-15°C (5°F) or higher

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

39 min. or more

Accumulated driving time*1

231 sec. or more

Driving distance after engine start*3

16 km (9.9 miles) or more

IAT*4

-10°C (14°F) or higher

ECT (12 sec. after engine start)

-10°C (14°F) or higher

Condition (C):

Duration time from engine start

12 sec. or more

ECT

-15°C (5°F) or higher

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

30 min. or more

Accumulated driving time*1

400 sec. or more

Driving distance after engine start*3

16 km (9.9 miles) or more

IAT*4

-15°C (5°F) or higher

ECT (12 sec. after engine start)

-15°C (5°F) or higher

Condition (D):

Duration time from engine start

12 sec. or more

ECT

-15°C (5°F) or higher

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

55 min. or more

Accumulated driving time*1

750 sec. or more

Driving distance after engine start*3

27 km (16.8 miles) or more

Condition (E):

Time after ECT reaches 60°C (140°F)

10 sec. or more

ATF temperature (12 sec. after engine start)

110°C (230°F) or higher

ECT (12 sec. 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% or more

Shift position

Not "N" or "P"

Engine

Running

However, accumulated driving time is cleared

-

When following condition met

-

Duration time from shifting to "N" or "P"

300 sec. or more

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

Duration time from shifting to "N" or "P"

300 sec. or more

*3: Driving distance is cleared when following condition met

Duration time from shifting to "N" or "P"

300 sec. or more

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

12 sec. after engine start

-

Duration time from shifting to "N" or "P"

300 sec. or more

TYPICAL MALFUNCTION THRESHOLDS

When either condition below is met: Condition (A), (B), (C) and (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

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 Perform registration and/or initialization when parts related to the ).
  • Perform registration and/or initialization when parts related to the automatic transmission are replaced (See page ).

HINT:

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

  1. Start the engine.*1
  2. Drive the vehicle 27 km (16.8 miles) or more over a period of 12 minutes and 30 seconds or more.*2
  3. After 55 minutes or more have elapsed since performing step (*1), turn the ignition switch off.*3
  4. Perform steps (*1) through (*3) again.
  5. Check for DTCs again (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)

  • Approx. 80°C (176°F): After stall test
  • Equal to ambient temperature when cold soak

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

HINT:

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

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

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

Temperature Displayed

Malfunction

-40°C (-40°F)

Open circuit

150°C (302°F) or higher

Short circuit

HINT:

If a circuit related to the No. 1 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 OTHER DTCS 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 DTC 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: ).

OK:

Automatic transmission fluid level is correct.

OK

REPLACE NO. 1 ATF TEMPERATURE SENSOR (TRANSMISSION WIRE)

NG

ADJUST FLUID LEVEL

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