5AT Automatic Transmission

DTC P0713





Circuit Description with 5AT Automatic Transmission
The automatic transmission fluid temperature (TFT) sensor is a thermistor. The powertrain control module (PCM) supplies a 5 volt reference signal to the sensor. When the transmission fluid is cold, the sensor resistance is high and the PCM senses a high signal voltage. As the transmission fluid warms, the sensor resistance lowers and the PCM senses lower voltage. The PCM uses the TFT reading in order to control the torque converter clutch (TCC), line pressure adjustments, and temperature compensated shifts.

When the PCM detects a continuous open or short to voltage in the TFT circuit or in the TFT sensor, 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 TFT DTC P0711.
^ The system voltage is 11 volts or greater.

Conditions for Setting the DTC
The TFT sensor voltage is 4.93 V or greater for at least 10 seconds.

Action Taken When the DTC Sets
^ The PCM does not illuminate the malfunction indicator lamp (MIL).
^ The PCM illuminates the SVS Lamp.
^ The PCM ignores the input from TFT sensor and uses the default values.
^ The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Failure Records.
^ The PCM stores DTC P0712 in PCM history.

Conditions for Clearing the SVS Lamp/DTC
^ The PCM turns OFF the service vehicle soon (SVS) lamp when the condition no longer exists.
^ A scan tool can clear the SVS lamp/DTC.
^ The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring.

Diagnostic Aids
^ Inspect the connectors at the PCM, the TFT sensor, and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections.
^ Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents.
^ Inspect for open or shorted to voltage TFT sensor wires.
^ Inspect for an open TFT sensor connector.
^ Inspect for a faulty TFT sensor.
^ Inspect for an internal fault of the PCM.





Test Description
The number below refers to the step number on the diagnostic table.
5. This step tests the TFT sensor signal circuit for being shorted to voltage, which would be the cause for the open in the TFT sensor.