General Information

Automatic Transaxle

P0712 Transmission Fluid Temperature Sensor 'A' Circuit Low Input - General Information

Component Location





General Description

The automatic TRANSAXLE fluid (ATF) temperature sensor is installed in the Valve Body. This sensor uses a thermistor whose resistance changes according to the temperature changes. The TCM supplies a 5 V reference voltage to the sensor, and the output voltage of the sensor changes when the ATF temperature varies. The automatic TRANSAXLE fluid (ATF) temperature provides very important data for the TCM's control of the Torque Converter Clutch, and is also used for many other purposes.

DTC Description

TCM sets DTC when the ATF temperature sensor signal has been detected over 200 °C, voltage is approximately 0 V, for 5 minutes. The TCM regards the ATF temperature as fixed at a value of 80 °C (176 °F) when ATF temperature sensor is faulty.
(MIL : Consecutive 2 Driving Cycle)

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram





Signal Waveform & Data












Fig 1) Normal
Fig 2) Open or Short to battery
Fig 3) Short to ground