P0712

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 transmission fluid pressure control circuit's fluid temperature is detected using the Automatic Transmission Fluid (ATF) temperature sensor, which is built onto the valve body. Depending on the fluid temperature, a signal is then input into the TCM.





The TCM applies a voltage to the temperature sensor through TCM terminal OIL.

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 decreases as the temperature becomes higher.

The TCM calculates the ATF temperature based on the voltage signal.

P0710:

P0712-P0713:

MONITOR DESCRIPTION
The ATF temperature sensor converts ATF temperature to an electrical resistance value. Based on the resistance, the TCM determines the ATF temperature, and the TCM detects an open or short in the ATF temperature circuit. If the resistance value of the ATF temperature is less than 79 Ohms*1 or more than 156 kOhms*2, the TCM interprets this as a fault in the ATF sensor or wiring. The TCM will illuminate the MIL and store the DTC.

HINT:
^ *1: 150°C (302°F) or more is indicated regardless of the actual ATF temperature.
^ *2: -40°C (-40°F) is indicated regardless of the actual ATF temperature.
^ The ATF temperature can be checked on the tester display.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE

WIRING DIAGRAM:

INSPECTION PROCEDURE

HINT: Using the intelligent tester or Techstream 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.

NOTICE: In the table, 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.

1. Warm up the engine.
2. Turn the engine switch off.
3. Connect the intelligent tester or Techstream to the DLC3.
4. Turn the engine switch on (IG).
5. Turn the tester ON.
6. Enter the following menus:
Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / ECT / DATA LIST.
Techstream - Select: Powertrain / ECT / Data List.
7. Follow the instructions on the tester and read the DATA LIST.
Intelligent tester

TCM:

Techstream

TCM:

HINT:
^ When DTC P0712 is output and the tester output is 150°C (302°F) or more, there is a short circuit.
^ When DTC P0713 is output and the tester output is -40°C (-40°F), there is an open circuit.
Measure the resistance between terminal OIL (OT) and the body ground.





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.

Step 1:

Steps 2-3: