4T65-E Automatic Transaxle

DTC P0713





Circuit Description
The automatic transmission fluid temperature (TFT) sensor is a negative coefficient thermistor whose resistance value changes based on temperature. The PCM 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 PCM 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
The ignition is ON.

Conditions for Setting the DTC
The PCM detects a TFT sensor voltage 4.92 volts or more for 6 minutes and 40 seconds continuous.

Action Taken When the DTC Sets
^ The PCM does not turn on the malfunction indicator lamp (MIL).
^ The PCM freezes transmission adaptive functions.
^ The PCM calculates a default TFT from the ECT sensor and the IAT sensor.
^ 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 P0713 in PCM history.

Conditions for Clearing the DTC
^ A scan tool can clear the 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.
^ The PCM cancels the DTC default actions when the fault no longer exists and the DTC passes.

Test Description

Step 1 - Step 7:

Step 8 - Step 16:

The numbers below refer to the step numbers on the diagnostic table.
3. A value of 4.9 - 5.0 volts indicates the PCM 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.