P0711

DTC P0711 TRANSMISSION FLUID TEMPERATURE SENSOR "A" PERFORMANCE

CIRCUIT DESCRIPTION

DTC Detection Condition:

The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance value which is input into the ECM.
The ECM applies a voltage to the temperature sensor through ECM terminal OIL. The sensor resistance changes with the transmission fluid 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.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

Component Operating Range:

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 opens or shorts in the ATF temperature circuit or a fault of the ATF temperature sensor. After running the vehicle for a certain period, the ATF temperature should increase. If the ATF temperature is below 10 C (50 F) after running the vehicle for a certain period, the ECM interprets this as a fault, and turns on the MIL.

Step 1-2:

INSPECTION PROCEDURE

HINT: According to the DATA LIST displayed by the hand-held tester, you can read the value of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one method to shorten labor time.

NOTE: 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 hand-held tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
d. Turn the ignition switch to the ON position.
e. Push the "ON" button of the the hand-held tester.
f. Select the item "DIAGNOSIS/ENHANCED OBD II/DATA LIST".
g. According to the display on tester, read the "DATA LIST".

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

HINT:
If a circuit related to the ATF temperature sensor becomes open, P0713 is immediately set (in 0.5 second). When P0713 is set, P0711 cannot be detected.
It is not necessary to inspect the circuit when P0711 is set.