P0710

DTC P0710 TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT

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 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 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:

The automatic transmission fluid (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 Ohm*1 or more than 156 kOhm*2, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will turn on the MIL and store the DTC.

*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.

HINT: The ATF temperature can be checked on the OBD II scan tool or hand-held tester display.

Wiring Diagram:

Step 1:

Step 2:

INSPECTION PROCEDURE

HINT: According to the DATA LIST displayed by the OBD II scan tool or 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.

a. Warm up the engine.
b. Turn the ignition switch off.
c. Connect the OBD II scan tool or hand-held tester to the DLC3.
d. Turn the ignition switch to the ON position.
e. Push the "ON" button of the OBD II scan tool or the hand-held tester.
f. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST".




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

HINT: When DTC P0712 is output and OBD II scan tool or hand-held tester output is 1501|C (3021|F), there is a short circuit. When DTC P0713 is output and OBD II scan tool or hand-held tester output is -40°C (-40°F), there is an open circuit.




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