Lexus IS250 IS220d GSE20 ALE20 - A960E AUTOMATIC TRANSMISSION
CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0711)
CHECK TRANSMISSION FLUID LEVEL
DTC P0711 Transmission Fluid Temperature Sensor "A" Performance
DESCRIPTION
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| DTC No. | DTC Detection Condition | Trouble Area |
| P0711 | Both (a) and (b) are detected: (2-trip detection logic) (a) Intake air and engine coolant temps. are more than -10°C (14°F) at engine start (b) After normal driving for over 18 min. and 20 sec. and 9 km (6 mile) or more, ATF temp. is less than 20°C (68°F) |
Transmission wire (ATF temperature sensor) |
MONITOR DESCRIPTION
This DTC indicates that there is a problem with output from the automatic transmission fluid (ATF) temperature sensor (TFT 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 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
INSPECTION PROCEDURE
| DATA LIST |
- HINT:
- Using the intelligent tester Data List allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the Data List early in troubleshooting is one way to shorten labor 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.
Warm up the engine.
Turn the engine switch off.
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) position.
Turn on the tester.
Select the item "Enter / Powertrain / ECT / Data List".
Follow the instructions on the tester and read the Data List.
| Item | Measurement Item/ Range (display) | Normal Condition |
| A/T Oil Temperature 1 | ATF Temp. Sensor Value/ min.: -40°C (-40°F) max.: 215°C (419°F) |
After Stall Test; Approx. 80°C (176°F) Equal to ambient temperature when cold soak |
- HINT:
- When DTC P0712 is output and intelligent tester output is 150°C (302°F) or more, there is a short circuit.
- When DTC P0713 is output and intelligent tester output is -40°C (-40°F), there is an open circuit.
- Measure the resistance between terminal OIL (OT) and body ground.
| Temperature Displayed | Malfunction |
| -40°C (-40°F) | Open circuit |
| 150°C (302°F) or more | Short circuit |
- 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.
| 1.CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0711) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) position.
Turn on the tester.
Select the item "Powertrain / ECT / DTC / Current or Pending".
Read the DTCs using the intelligent tester.
- Result:
Display (DTC output) Proceed to Only "P0711" is output A "P0711" and other DTCs B
- HINT:
- If any other codes besides "P0711" are output, perform troubleshooting for those DTCs first.
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| A | |
| 2.CHECK TRANSMISSION FLUID LEVEL |
- OK:
- Automatic transmission fluid level is correct.
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| OK | ||
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