P0713

Diagnostic Chart (Part 2 of 2):

Schematic:

Circuit Description with 4T80-E Automatic Transaxle
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 or open circuits result in high signal voltage. The TFT operating range is -40 to +151°C (-40 to +305°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.

CONDITIONS FOR RUNNING THE DTC
- No VSS DTCs P502 or P0503.
- No AT ISS DTCs P0716 or P0717.
- The system voltage is 8-18 volts.
- The engine run time is greater than 5 seconds.
- The engine is not in fuel cut off.
- The transmission output shaft speed is greater than 738 RPM for 5 minutes cumulatively.
- The TCC slip speed is greater than 49 RPM for 6 minutes and 40 seconds cumulatively.

CONDITIONS FOR SETTING THE DTC
The PCM detects a reading of -40°C (-40°F) or less for 6 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The PCM does not illuminate the Malfunction Indicator Lamp (MIL).
- The PCM calculates a default transmission fluid temperature based on engine coolant temperature, intake air temperature and engine run time.
- The PCM records the operating conditions when the 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/or the ignition switch is OFF long enough in order to power down the PCM.

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 and Poor Connections in Diagrams.
- Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Diagrams.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
3. This step tests the wiring from the AT inline 20-way connector to the PCM for an open or short to voltage.
4. This step verifies the signal circuit from the PCM to the AT inline 20-way connector.