Dtc P0710 Transmission Fluid Temperature Sensor A Circuit


DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)

CHECK WIRE HARNESS (TRANSMISSION WIRE - ECM)

DTC P0710 Transmission Fluid Temperature Sensor "A" Circuit

DTC P0712 Transmission Fluid Temperature Sensor "A" Circuit Low Input

DTC P0713 Transmission Fluid Temperature Sensor "A" Circuit High Input


DESCRIPTION

The Automatic Transmission Fluid (ATF) temperature sensor converts the ATF temperature into a resistance value which is input into the ECM.
The ECM applies a voltage to the temperature sensor through ECM terminal THO1.
The sensor resistance changes with the ATF temperature.
One terminal of the sensor is grounded so that the sensor resistance and voltage decrease as the temperature becomes higher.
The ECM calculates the ATF based on the voltage signal.

DTC No.
DTC Detection Condition
Trouble Area
P0710
No. 1 ATF temperature sensor resistance changes from (a) to (b) or from (b) to (a) in less than 0.5 sec., and P0712 and P0713 are not detected (1 trip detection logic):
(a) No. 1 ATF temperature sensor resistance is less than 79 Ω
(b) No. 1 ATF temperature sensor resistance is more than 156 kΩ
  1. Open or short in No. 1 ATF temperature sensor circuit
  2. No. 1 ATF temperature sensor
  3. ECM
P0712
No. 1 ATF temperature sensor resistance is less than 79 Ω for 0.5 sec. or more (1 trip detection logic)
  1. Short in No. 1 ATF temperature sensor circuit
  2. No. 1 ATF temperature sensor
  3. ECM
P0713
15 minutes or more after the engine start, No. 1 ATF temperature sensor resistance is more than 156 kΩ for 0.5 sec. or more (1 trip detection logic)
  1. Open in No. 1 ATF temperature sensor circuit
  2. No. 1 ATF temperature sensor
  3. ECM

MONITOR DESCRIPTION

ATF temperature sensor converts ATF temperature to an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM detects an open or short in the ATF temperature circuit. If the resistance value of the ATF temperature is less than 79 Ω*1 or more than 156 kΩ*2, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will illuminate the MIL and store the DTC.
HINT:
  1. *1: 150°C (302°F) or more is indicated regardless of the actual ATF temperature.
  2. *2: -40°C (-40°F) is indicated regardless of the actual ATF temperature.
  3. The ATF temperature can be checked on the intelligent tester display.

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750F Automatic Transmission.Automatic Transmission System. Dtc P0710 Transmission Fluid Temperature Sensor A Circuit


INSPECTION PROCEDURE

HINT:
Using the intelligent tester's Data List allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the Data List early in troubleshooting is one way to save time.
  1. Warm up the engine.
  2. Turn the ignition switch OFF.
  3. Connect the intelligent tester to the DLC3.
  4. Turn the ignition switch ON and push the tester main switch ON.
  5. Enter the following menus: Powertrain / Engine and ECT / Data List.
  6. Follow the instructions on the tester and read the Data List.

Item
Measurement Item/
Range (Display)
Normal Condition
Diagnostic Note
A/T Oil Temperature 1
No. 1 ATF temperature sensor value/
Min.: -40°C (-40°F)
Max.: 215°C (419°F)
  1. After stall test:
    Approximately 80°C (176°F)
  2. Equal to ambient temperature while engine is cold
If value is -40°C (-40°F) or 150°C (302°F), No. 1 ATF temperature sensor circuit is open or short circuited
CAUTION:
In the table above, 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.
HINT:
  1. When DTC P0712 is output and the intelligent tester output is 150°C (302°F) or more, there is a short circuit.
  2. When DTC P0713 is output and the intelligent tester output is -40°C (-40°F), there is an open circuit.
    Measure the resistance between terminal THO1 (OT) and the body ground.

Temperature Displayed
Malfunction
-40°C (-40°F)
Open circuit
150°C (302°F) or more
Short circuit
HINT:
If a circuit related to the ATF temperature sensor becomes open, P0713 is set in approximately 0.5 seconds.
It is not necessary to inspect the circuit when P0711 is set.
1.INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750F Automatic Transmission.Automatic Transmission System. Dtc P0710 Transmission Fluid Temperature Sensor A Circuit

  1. Disconnect the E1 ATF temperature sensor connector from the transmission.

  1. Measure the resistance of the temperature sensor.

    Standard resistance:
    Tester Connection
    		Specified Condition
    2 (OT-) - 10 (OT+)
    		79 Ω to 156 kΩ
    2 (OT-) - Body ground
    		1 MΩ or higher
    10 (OT+) - Body ground
    		1 MΩ or higher
    HINT:
    If the resistance is not within the specified range of either of the ATF temperatures shown in the table below, the driveability of the vehicle may decrease.
    Standard resistance:
    ATF Temperature
    		Specified Condition
    20 °C (68°F)
    		3 to 4 kΩ
    110°C (230°F)
    		0.22 to 0.28 kΩ


NG
REPAIR OR REPLACE TRANSMISSION WIRE
OK


2.CHECK WIRE HARNESS (TRANSMISSION WIRE - ECM)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750F Automatic Transmission.Automatic Transmission System. Dtc P0710 Transmission Fluid Temperature Sensor A Circuit

  1. Disconnect the E15 and E16 ECM connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    E16-24 (THO1) - E15-28 (E2)
    		79 Ω to 156 kΩ
    E16-24 (THO1) - Body ground
    		1 MΩ or higher
    E15-28 (E2) - Body ground
    		1 MΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ECM