Transmission. Camry. Acv40 Gsv40
U660E Automatic Transaxle. Camry. Acv40 Gsv40
INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)
INSPECT ATF TEMPERATURE SENSOR
DTC P0712 Transmission Fluid Temperature Sensor "A" Circuit Low Input |
DTC P0713 Transmission Fluid Temperature Sensor "A" Circuit High Input |
DESCRIPTION
The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance value for use by the TCM.
The TCM applies a voltage to the temperature sensor through terminal OIL of the TCM.
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 TCM calculates the fluid temperature based on the voltage signal.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0712 | ATF temperature sensor resistance is less than 79 Ω for 0.5 sec. or more (1-trip detection logic). |
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| P0713 | ATF temperature sensor resistance is more than 156 kΩ when 15 minutes or more have elapsed after the engine starts. DTC is detected for 0.5 sec. or more (1-trip detection logic). |
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MONITOR DESCRIPTION
These DTCs indicate an open or short in the automatic transmission fluid (ATF) temperature sensor (TFT sensor) circuit. The automatic transmission fluid (ATF) temperature sensor converts ATF temperature into an electrical resistance value. Based on the resistance, the TCM determines the ATF temperature, and the TCM detects an open or short in the ATF temperature circuit. If the resistance value of the ATF temperature is less than 79 Ω*1 or more than 156 kΩ*2, the TCM interprets this as a fault in the ATF sensor or wiring. The TCM 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 intelligent tester display.
WIRING DIAGRAM
INSPECTION PROCEDURE
| DATA LIST |
- HINT:
- According to the Data List displayed on the intelligent tester, you can read the value of switches, sensors, actuators and other items without removing any parts. Reading the Data List as the first step in troubleshooting is one method to save 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.
Warm up the engine.
Turn the engine switch off.
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn on the tester.
Enter the following items: "Powertrain / ECT / Data List".
According to the display on tester, read "Data List".
Item Measurement Item/
Range (display)Normal Condition AT OIL TEMP1 ATF Temperature 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 the intelligent tester indicates 150°C (302°F) or more, there is a short circuit.
- When DTC P0713 is output and the intelligent tester indicates -40°C (-40°F), there is an open circuit.
- Measure the resistance between terminal OIL and body ground.
Temperature Displayed Malfunction -40°C (-40°F) Open circuit 150°C (302°F) or more Short circuit - HINT:
- If the 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.
- After Stall Test;
| 1.INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR) |
Remove the TCM from the transaxle.
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Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Specified Condition 17 (E2) - 18 (THO1) 90 Ω to 156 kΩ 17 (E2) - Body ground 10 kΩ or higher 18 (THO1) - Body ground 10 kΩ or higher
- HINT:
- If the resistance is out of the specified range with the ATF temperature shown in the table below, the driveability of the vehicle may decrease.
- Standard resistance:
ATF Temperature Specified Condition 10°C (50°F) 5 to 8 kΩ 25°C (77°F) 2.5 to 4.5 kΩ 110°C (230°F) 0.22 to 0.28 kΩ
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| NG | |
| 2.INSPECT ATF TEMPERATURE SENSOR |
Disconnect the ATF temperature sensor connector from the transmission wire.
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Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Specified Condition E2 - THO1 90 Ω to 156 kΩ E2 - Body ground 10 kΩ or higher THO1 - Body ground 10 kΩ or higher
- HINT:
- If the resistance is out of the specified range with the ATF temperature shown in the table below, the driveability of the vehicle may decrease.
- Standard resistance:
ATF Temperature Specified Condition 10°C (50°F) 5 to 8 kΩ 25°C (77°F) 2.5 to 4.5 kΩ 110°C (230°F) 0.22 to 0.28 kΩ
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| OK | ||
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