DTC Advanced Diagnostics: P0712
DTC P0712:CVT Fluid Temperature Sensor (Short)

General Description

The transmission fluid temperature sensor is a thermistor type sensor that changes resistance according to the change in transmission fluid temperature. The powertrain control module (PCM) sends a 5 V reference signal to the sensor through a pull-up resistor. When the transmission fluid temperature is low, the sensor resistance increases and the PCM detects a high signal voltage. As the transmission fluid temperature rises, the sensor resistance decreases and the PCM detects a low signal voltage. When the transmission fluid temperature sensor signal voltage to the PCM is below specification, indicating that the temperature is above specification (a short to ground), the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
10 seconds or more
DTC Type*1
Two drive cycles, MIL on, Shift position indicator blinks
DTC Type*2
Two drive cycles, MIL off, Shift position indicator blinks
*1: KA model

*2: Except KA models

Enable Conditions
Condition
Minimum
Maximum
12 volt battery voltage
[BATTERY VOLTAGE]
11 V
–
[ ]: HDS Parameter

Malfunction Threshold
The transmission fluid temperature sensor output voltage [CVTF Temp Sensor (V)] is less than 0.07 V for at least 10 seconds.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
Transmission fluid temperature sensor TATF line short to ground
Transmission fluid temperature sensor failure
PCM internal circuit failure

Confirmation Procedure
Operating Condition
1.
Start the engine.
2.
Shift to P position/mode, and wait for at least 10 seconds.
With the HDS
None.

Diagnosis Details*1
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on, the shift position indicator blinks, and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The shift position indicator comes off by turning the vehicle to the OFF (LOCK) mode. The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.

Diagnosis Details*2
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the shift position indicator blinks and a Confirmed DTC and the freeze data are stored. The MIL does not come on.

Conditions for clearing the DTC
The shift position indicator comes off by turning the vehicle to the OFF (LOCK) mode. The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.