P0713
DTC P0713
Circuit Description
The automatic transmission fluid temperature (TFT) sensor is a negative coefficient thermistor whose resistance value changes based on temperature. The TCM provides a 5 volt reference to the sensor. A low fluid temperature, an open TFT sensor or sensor circuit results in high signal voltage. The TFT operating range is -40 to +151°C (-40 to +304°F).
If the TCM detects a continuous open or a short to voltage on the TFT sensor circuit, then DTC P0713 sets. DTC P0713 is a type C DTC.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Voltage
Conditions for Running the DTC
^ No ISS DTC P0716 or P0717.
^ No VSS DTC P0722 or P0723.
^ The engine speed is greater than 500 RPM for 5 seconds.
^ The output speed is 70 RPM or more for 200 seconds cumulatively.
^ The TCC slip speed is 120 RPM or more for 200 seconds cumulatively.
Conditions for Setting the DTC
The TCM detects a TFT less than -40°C (-40°F) for 80 seconds.
Action Taken When the DTC Sets
^ The TCM does not request the ECM to illuminate the malfunction indicator lamp (MIL).
^ The TCM freezes transmission adaptive functions.
^ The TCM calculates a default TFT from the ECT sensor, the IAT sensor and engine run time.
^ The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Failure Records.
^ The TCM stores DTC P0713 in TCM history.
Conditions for Clearing the DTC
^ A scan tool can clear the DTC.
^ The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring.
^ The TCM cancels the DTC default actions when the fault no longer exists and the DTC passes.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
3. A value of 4.9 - 5.0 volts indicates the TCM and engine side of the wiring are good.
6. A short to voltage greater than 5 volts would cause the TFT sensor to open.
9. A short to the TFT sensor signal circuit and any other circuits in the transmission harness could cause the TFT sensor to open.
