P0711

U241E AUTOMATIC TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: P0711: Transmission Fluid Temperature Sensor "A" Performance

DTC P0711 - Transmission Fluid Temperature Sensor "A" Performance

DESCRIPTION

The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance value which is input into the ECM.





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 ECM determines the ATF temperature, detects open or short circuits of the ATF temperature circuit, and detects faults in the ATF temperature sensor.
Condition A (2-trip detection logic):
First, the ECM checks for the following conditions:
1. 19 minutes or more after the engine is started and after 9 km (5.6 miles) or more of driving, the ECT is -15°C (5°F) or more.
2. After starting the engine and a certain period of time has elapsed, the ECT and IAT are -10°C (14°F) or more.

If the conditions are met, the ECM then checks if the ATF temperature is less than 20°C (68°F). If so, the ECM interprets this as a fault and illuminates the MIL.
Condition B (2 -trip detection logic):
First, the ECM checks for the following conditions:
1. ECT is 60°C (140°F) or more.
2. After starting the engine and a certain period of time has elapsed, the ECT is less than 35°C (95°F).

If the conditions are met, the ECM then checks if the ATF temperature is 100°C (212°F) or more. If so, the ECM 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. READ DATA LIST
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn on the Techstream.
(f) Select the item "Powertrain / Engine and ECT / Data List".
(g) According to the display on the tester, read the "Data List".





HINT: When DTC P0712 is output and the Techstream output is 150°C (302°F), there is a short circuit.
When DTC P0713 is output and the Techstream output is -40°C (-40°F), there is an open circuit.
Measure the resistance between terminal THO1 (THO) and body ground.





HINT: If a circuit related to the ATF temperature sensor become 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.

PROCEDURE

1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0711)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and push the Techstream main switch on.
(c) Select the item "Powertrain / Engine and ECT / Trouble Codes".
(d) 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 GO TO DTC CHART
A -- Continue to next step.
2. CHECK TRANSMISSION FLUID LEVEL
OK:
Automatic transmission fluid level is correct.
NG -- ADD FLUID
OK -- REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)