P0711

DTC P0711 TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT RANGE/PERFORMANCE

CIRCUIT DESCRIPTION

DTC Detection Conditions:

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 THO1.

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 and the voltage decrease 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:

This DTC indicates that there is a problem with the 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 any open or short malfunctions 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 20°C (68°F) after running the vehicle for a certain period, the ECM interprets this as a fault, and turns on the MIL.

Wiring Diagram:

Step 1 - 2:

INSPECTION PROCEDURE

HINT: According to the DATA LIST displayed on the hand-held tester, you can read the values of components, such as the switches, sensors and actuators, without removing any parts. Reading the DATA LIST as a first step of troubleshooting is one method of shortening labor time.

NOTE: In the table, the values listed under "Normal Condition" are for reference only. Do not depend solely on these reference values when judging whether a part is faulty or not.

a. Warm up the engine.
b. Turn the ignition switch off.
c. Connect the hand-held tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3.
d. Turn the ignition switch to the ON position.
e. Push the "ON" button of the tester.
f. Select the items "DIAGNOSIS/ ENHANCED OBD II/ DATA LIST/ A/T".




g. According to the display on the tester, read the "DATA LIST".






HINT:
When DTC P0712 is output and hand-held tester reading is 150°C (302°F) or more, there is a short circuit.

When DTC P0713 is output and hand-held tester reading is -40°C (-40°F), there is an open circuit.

Measure the resistance between terminal THO1 (OT) and the body ground.

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

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