DTC P0710-15: Transmission Fluid Temperature Sensor "A" Circuit Short to Battery or Open [10/2022 - ]: Description

WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

The ATF temperature sensor converts the automatic transaxle fluid (ATF) temperature into a resistance value for use by the ECM.

The ECM applies voltage to the temperature sensor through terminal THO1 of the ECM.

The sensor resistance changes with the ATF temperature. As the temperature rises, the sensor resistance decreases.

One terminal of the sensor is grounded so that the sensor resistance and voltage decrease as the temperature rises.

The ECM calculates the ATF temperature based on the voltage signal.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Priority	Note
P0710-15	Transmission Fluid Temperature Sensor "A" Circuit Short to Battery or Open	The ATF temperature sensor voltage is more than 4.915 V for 0.5 seconds when either of the following conditions is met (1-trip detection logic): for Mexico Models: 900 seconds or more have elapsed since engine start (engine coolant temperature and intake air temperature were -29.375°C (-20.875°F) or less at engine start). except Mexico Models: 450 seconds or more have elapsed since engine start (engine coolant temperature and intake air temperature were -29.375°C (-20.875°F) or less at engine start). 10 seconds or more have elapsed since engine start (engine coolant temperature and intake air temperature were higher than -29.375°C (-20.875°F) at engine start).	Open or short to +B in ATF temperature sensor circuit Transmission wire (ATF temperature sensor) ECM	Comes on	Transmission	A	SAE Code: P0713

DTC DETECTION CONDITION PATTERNS:

		Vehicle Condition
		Pattern 1	Pattern 2
Diagnostic Condition	for Mexico Models: 900 seconds or more have elapsed since engine start (engine coolant temperature and intake air temperature were -29.375°C (-20.875°F) or less at engine start).	◦	-
	except Mexico Models: 450 seconds or more have elapsed since engine start (engine coolant temperature and intake air temperature were -29.375°C (-20.875°F) or less at engine start).	◦	-
	10 seconds or more have elapsed since engine start (engine coolant temperature and intake air temperature were higher than -29.375°C (-20.875°F) at engine start).	-	◦
Malfunction Condition	ATF temperature sensor voltage is more than 4.915 V	◦	◦
Duration		0.5 seconds or more	0.5 seconds or more
Detection Logic		1-trip detection logic	1-trip detection logic

HINT:

This DTC is stored when either of the above detection patterns is met.