DTC P0710, P0712, P0713: Transmission Fluid Temperature Sensor "A" Circuit; Transmission Fluid Temperature Sensor "A" Circuit Low Input; Transmission Fluid Temperature Sensor "A" Circuit High Input: Description

WARNING: This page is about a different variant/trim than selected.

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

Fig 1: Identifying Resistance/Temperature Graph

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

The ECM applies a voltage to the temperature sensor through ECM terminal OIL.

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 ECM calculates the fluid temperature based on the voltage signal.

DTC DETECTING CONDITION - TROUBLE AREA

DTC No.	DTC Detection Condition	Trouble Area
P0710	and (b) are detected momentary within 0.5 sec. when neither P0712 or P0713 is not detected (1-trip detection logic) ATF temperature sensor resistance is less than 79 ohms. ATF temperature sensor resistance is more than 156 k ohms. HINT: Within 0.5 sec., the malfunction switches from (a) to (b) or from (b) to (a)	Open or short in ATF temperature sensor circuit Transmission wire (ATF temperature sensor) ECM
P0712	ATF temperature sensor resistance is less than 79 ohms for 0.5 sec. or more (1-trip detection logic)	Short in ATF temperature sensor circuit Transmission wire (ATF temperature sensor) ECM
P0713	ATF temperature sensor resistance is more than 156 k ohms when 15 minutes or more after the engine start DTC is detected for 0.5 sec. or more (1-trip detection logic)	Open in ATF temperature sensor circuit Transmission wire (ATF temperature sensor) ECM

DTC No.

DTC Detection Condition

Trouble Area

P0710

and (b) are detected momentary within 0.5 sec. when neither P0712 or P0713 is not detected (1-trip detection logic)

ATF temperature sensor resistance is less than 79 ohms.
ATF temperature sensor resistance is more than 156 k ohms.
HINT:

Within 0.5 sec., the malfunction switches from (a) to (b) or from (b) to (a)

Open or short in ATF temperature sensor circuit
Transmission wire (ATF temperature sensor)
ECM

P0712

ATF temperature sensor resistance is less than 79 ohms for 0.5 sec. or more (1-trip detection logic)

Short in ATF temperature sensor circuit
Transmission wire (ATF temperature sensor)
ECM

P0713

ATF temperature sensor resistance is more than 156 k ohms when 15 minutes or more after the engine start DTC is detected for 0.5 sec. or more (1-trip detection logic)

Open in ATF temperature sensor circuit
Transmission wire (ATF temperature sensor)
ECM