DTC P0713. Cadillac CTS 2007

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2007 🢒 CTS 🢒 Transmission/Transaxle 🢒 Manual Transmission - Tremec 6-Speed 🢒 DTC P0713

Circuit Description

Important: This diagnostic procedure is for manual transmission vehicles with RPO VD1 and/or RPO Z06.

The transmission fluid temperature (TFT) sensor contains a semiconductor device which changes the resistance based on the temperature, a thermistor. The TFT sensor has a signal circuit and a ground circuit. The engine control module (ECM) applies a voltage, approximately 5 volts, on the signal circuit to the sensor. The ECM monitors the changes in this voltage caused by changes in the resistance of the sensor in order to determine the fluid temperature.

When the ECM senses a signal voltage higher than the normal operating range of the 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

The engine is running.

Conditions for Setting the DTC

•	The TFT is less than -35°C (-31°F).

•	The conditions are met for 10 seconds.

Action Taken When the DTC Sets

•	The ECM stores the DTC information into memory when the diagnostic runs and fails.

•	The ECM does not illuminate the malfunction indicator lamp (MIL).

•	The ECM records the operating conditions when the Conditions for Setting the DTC and met. The ECM stores this information as Failure Records.

•	The ECM stores DTC P0713 in ECM history.

•	A message is displayed on the drivers information center (DIC).

Conditions for Clearing the DTC

•	The ECM clears the DIC message when the condition no longer exists.

•	A scan tool can clear the DTC.

•	The ECM clears the DTC from ECM history if the vehicle completes 40 warm-up cycles without an non-emission-related diagnostic fault occurring.

•	The ECM cancels the DTC default actions when the fault no longer exists and the DTC passes.

Diagnostic Aids

Important:

•	Remove any debris from the ECM connector surfaces before servicing the ECM. Inspect the ECM connector gaskets when diagnosing/replacing the module. Ensure that the gaskets are installed correctly. The gaskets prevent contaminate intrusion into the ECM.

•	For any test that requires probing the ECM or a component harness connector, use the J 35616 GM terminal test kit. Using this kit prevents damage to the harness/component terminals. Refer to Using Connector Test Adapters .

•

If the engine has sat overnight, the transmission fluid temperature and the intake air temperature values should display within a few degrees of each other. If the temperatures are not within 3°C (5°F), refer to Temperature Versus Resistance - Engine Coolant Temperature Sensor and Temperature Versus Resistance - Intake Air Temperature Sensor for the 2.8L engine or Temperature Versus Resistance - Engine Coolant Temperature Sensor and Temperature Versus Resistance - Intake Air Temperature Sensor for the 3.6L (LY7) engine.

•	For an intermittent, refer to Symptoms - Engine Controls for the 2.8L engine or Symptoms - Engine Controls for the 3.6L (LY7) engine.

Test Description

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

This step determines if the malfunction is present.

Using the Failure Records data may aid in locating an intermittent condition. If you cannot duplicate the DTC, the information included in the Failure Records data can help determine how many miles since the DTC set. The Fail Counter and Pass Counter can also help determine how many ignition cycles the diagnostic reported a pass and/or a fail. Operate the vehicle within the same failure records conditions, such as RPM, load, vehicle speed, temperature, that you observed. This will isolate when the DTC failed.

A TFT above 139°C (282°F) indicates that the ECM and TFT sensor wiring is functioning correctly.

A TFT above 139°C (282°F) indicates that the ECM and TFT sensor signal circuit is functioning correctly.

Disconnecting the ECM allows using the DMM in order to test continuity of the circuits. This aids in locating an open or a shorted circuit.

Inspect for proper terminal tension/connections at the ECM harness before replacing the ECM.

Step

Action

Values

Yes

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

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 Failure Records. Using the Clear Info function erases the Failure Records from the ECM.

Monitor the TFT sensor display on the Engine 3 Data List of the scan tool.

Is the TFT sensor below the specified value?

-39°C (-38°F)

Go to Step 4

Go to Step 3

Turn ON the ignition, with the engine OFF.
Review the Failure Records data for this DTC and observe the parameters.
Turn OFF the ignition for 15 seconds.
Start the engine.
Operate the vehicle within the conditions required for this diagnostic to run, and as close to the conditions recorded in the Failure Records as possible. Special operating conditions that you need to meet before the ECM will run this diagnostic, where applicable, are listed in Conditions for Running the DTC.
Select the Diagnostic Trouble Code (DTC) option, the Specific DTC option, then enter the DTC number using the scan tool.

Does the scan tool indicate that this diagnostic failed this ignition?

Go to Step 4

Go to Diagnostic Aids

Disconnect the TFT sensor electrical connector.
Connect a 3-amp fused jumper wire between the signal circuit of the TFT sensor and the low reference circuit of the TFT sensor.
Observe the Transmission Fluid Temperature parameter on the scan tool.

Is the TFT sensor above the specified value?

150°C (284°F)

Go to Step 9

Go to Step 5

Connect a 3-amp fused jumper wire between the signal circuit of the TFT sensor to ground.

Is the TFT sensor at the specified value?

150°C (284°F)

Go to Step 8

Go to Step 6

Turn OFF the ignition.
Disconnect the ECM connector C2.
Test the TFT sensor signal circuit for an open. Refer to Testing for Continuity .

Is the TFT sensor signal circuit open?

Go to Step 7

Go to Step 11

Repair the TFT sensor signal circuit. Refer to Wiring Repairs .

Is the action complete?

Go to Step 14

Turn OFF the ignition.
Disconnect the ECM connector C1.
Test the TFT sensor ground circuit for an open. Refer to Circuit Testing .

Is the TFT sensor ground circuit open?

Go to Step 10

Go to Step 11

Replace the TFT sensor. Refer to Transmission Fluid Temperature Sensor Replacement .

Is the action complete?

Go to Step 14

Repair the TFT sensor ground circuit. Refer to Wiring Repairs .

Is the action complete?

Go to Step 14

Test for a short to voltage on the signal circuit. Refer to Testing for a Short to Voltage and Wiring Repairs .

Did you find and correct the condition?

Go to Step 14

Go to Step 12

Inspect for poor connections at the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Repairing Connector Terminals .

Did find and correct the condition?

Go to Step 14

Go to Step 13

Replace the ECM. Refer to Control Module References for replacement, setup, and programming.

Is the action complete?

Go to Step 14

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?

Go to Step 15

Go to Step 2

With the scan tool, observe the stored information, capture info and DTC info.

Does the scan tool display any DTCs that you have not diagnosed?

Go to Diagnostic Trouble Code (DTC) List - Vehicle

System OK