AA80E Automatic Transmission

AA80E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0711: Transmission Fluid Temperature Sensor "A" Performance

DTC P0711 - Transmission Fluid Temperature Sensor "A" Performance

SYSTEM 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.










MONITOR DESCRIPTION

This DTC indicates that there is a problem with output from the 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 TCM determines the ATF temperature and detects open or short circuits in the ATF temperature circuit or faults in 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 TCM interprets this as a fault, and illuminates the MIL.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All





Condition (A)





Condition (B)





TYPICAL MALFUNCTION THRESHOLDS

Condition (A)





Condition (B)





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT:
Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

NOTICE:
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.

1 Warm up the engine.
2 Turn the engine switch off.
3 Connect the Techstream to the DLC3.
4 Turn the engine switch on (IG).
5 Turn the Techstream on.
6 Enter the following menus: Powertrain / ECT / Data List.
7 According to the display on the Techstream, read the Data List.

TCM:





HINT:
- When DTC P0712 is output and the Techstream output is 150°C (302°F) or more, there is a short circuit.
- When DTC P0713 is output and the Techstream output is -40°C (-40°F), there is an open circuit. Check the temperature displayed on the Techstream in order to check if a malfunction exists.





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.

PROCEDURE

1. CHECK DTC OUTPUT (IN ADDITION TO DTC P0711)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / ECT / Trouble Codes.
(e) Read the DTCs using the Techstream.
Result:





HINT:
If any other codes besides P0711 are output, perform troubleshooting for those DTCs first.

B -- Go to DTC Chart Diagnostic Trouble Code Descriptions
A -- Continue to next step.
2. CHECK TRANSMISSION FLUID LEVEL
(a) Check the transmission fluid level AA80E Automatic Transmission.
OK:
Automatic transmission fluid level is correct.
NG -- ADJUST FLUID LEVEL
OK -- REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)