DTC P0710-11: Transmission Fluid Temperature Sensor "A" Circuit Short to Ground [11/2021 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus NX 350, 2024 Lexus NX 350, 2023 Lexus NX 350, and 2022 Lexus NX 350. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE USING GTS
- Read the Data List according to the display on the GTS.
Powertrain > Transmission > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note A/T Oil Temperature No. 1 ATF temperature sensor value Min.: -40°C (-40°F)
Max.: 150°C (302°F)
or Invalid Value- Approximately 80°C (176°F): After stall speed test
- Equal to ambient temperature: When engine is cold
If value is -40°C (-40°F) or 150°C (302°F), ATF temperature sensor circuit is open or shorted Powertrain > Transmission > Data List
Tester Display A/T Oil Temperature No. 1 Result
Result Proceed to Data List value is normal A Data List value is not normal B
Result:
A
See step 3
Result:
B
See step 2
- Read the Data List according to the display on the GTS.
- CHECK HARNESS AND CONNECTOR (ATF TEMPERATURE SENSOR - ECM)
- Disconnect the B51 ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition B51-40 (THO1) - B51-41 (ETHO) Always 79 Ω to 156 kΩ B51-41 (ETHO) - Body ground Always 10 kΩ or higher B51-40 (THO1) - Body ground Always 10 kΩ or higher HINT:
If the resistance is out of the specified range at any of the ATF temperatures shown in the table below, the driveability of the vehicle may decrease.
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 Result
Proceed to OK NG
Result:
NG
See step 4
Result:
OK
See step 3
- REPLACE ECM
Refer to REMOVAL [11/2021 - ]
Result
Proceed to NEXT Result:
NEXT
PERFORM REGISTRATION. Refer to REGISTRATION [11/2021 - ]
- CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
- Disconnect the B39 transmission wire connector.
- Disconnect the B51 ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition B39-1 (OIL) or B51-40 (THO1) - Body ground Always 10 kΩ or higher B39-2 (E2) or B51-41 (ETHO) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR). Refer to REMOVAL [11/2021 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM)