DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input. Cadillac Seville 2000

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2000 🢒 Seville 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T80-E 🢒 DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input

Automatic Transmission Components
Automatic Transmission Controls Schematics
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice

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 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 Conditions and Poor Connections in Wiring Systems.

•	Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Wiring Systems.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

This step tests the wiring from the AT inline 20-way connector to the PCM for an open or short to voltage.

This step verifies the signal circuit from the PCM to the AT inline 20-way connector.

DTC P0713 Transmission Fluid Temperature Sensor Circuit -- High Input

Step

Action

Value(s)

Yes

Did you perform the Powertrain Diagnostic System Check?

Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check

Install a Scan Tool .
Turn ON the ignition, with the engine OFF.

Important: Before clearing the DTC, use the Scan Tool in order to record the DTC Failure Records. Using the Clear Info function erases the Failure Records from the PCM.

Record the DTC Failure Records.
Clear the DTC.
Select Trans. Fluid Temp. on the Scan Tool .

Does the Scan Tool display a Trans. Fluid Temp. less than the specified value?

-39°C (-38°F)

Go to Step 3

Go to Diagnostic Aids

Turn OFF the ignition.
Disconnect the AT inline 20-way connector (additional DTCs may set).
Install the J 44152 jumper harness (20 pins) on the engine side of the AT inline 20-way connector.
Using the J 35616 connector test adapter kit, connect a fused jumper wire between terminals L and M of the J 44152 .
Turn ON the ignition, with the engine OFF.

Does the Scan Tool display a Trans. Fluid Temp. greater than the specified value?

149°C (300°F)

Go to Step 7

Go to Step 4

Using the J 35616 , connect a fused jumper wire from terminal L of the J 44152 to a good ground.

Refer to Automatic Transmission Inline Harness Connector End View .

Does the Scan Tool display a Trans. Fluid Temp. greater than the specified value?

149°C (300°F)

Go to Step 6

Go to Step 5

Test the signal circuit (CKT 1227) of the TFT sensor for an open between the PCM connector C2 and the AT inline 20-way connector.

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 10

Test the ground circuit (CKT 2762) of the TFT sensor for an open between the PCM connector C2 and the AT inline 20-way connector.

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Test the signal circuit (CKT 1227) of the TFT sensor for an open between the AT inline 20-way connector and the TFT sensor.
Test the ground circuit (CKT 452) of the TFT sensor for an open between the AT inline 20-way connector and the TFT sensor.

Refer to Circuit Testing in Wiring Systems.

Did you find a condition?

Go to Step 8

Go to Step 9

Replace the automatic transmission wiring harness.

Refer to Transmission Overhaul in the 4T80-E section of the Transmission Unit Repair Manual.

Did you complete the replacement?

Go to Step 11

Replace the TFT sensor.

Refer to Transmission Overhaul in the 4T80-E section of the Transmission Unit Repair Manual.

Did you complete the replacement?

Go to Step 11

Replace the PCM.

Refer to Powertrain Control Module Replacement/Programming in Engine Controls.

Did you complete the replacement?

Go to Step 11

Perform the following procedure in order to verify the repair:

Select DTC.
Select Clear Info.
Operate the vehicle under the following conditions:

•	Turn ON the ignition, with the engine OFF.

•	The Trans. Fluid Temp. must be greater than -40°C (-40°F) for 6 seconds.

Select Specific DTC. Enter DTC P0713.

Has the test run and passed?

System OK

Go to Step 1