Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provide an overview of each diagnostic category. |
DTC Descriptor
DTC P0711: Transmission Fluid Temperature (TFT) Sensor PerformanceDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
TFT Sensor Signal | P0712 | P0713 | P0713 | P0218, P0711 |
Low Reference | -- | P0713 | -- | P0218, P0711 |
Typical Scan Tool Data
Circuit | Short to Ground | Open/High Resistance | Short to Voltage |
|---|---|---|---|
Operating Conditions: Engine running in PARK, normal operating temperature Parameter Normal Range: Varies near coolant temperature | |||
Trans. Fluid Temp. | 150°C (304°F) | -40°C (-40°F) | -40°C (-40°F) |
Circuit/System Description
The TFT sensor is a negative coefficient thermistor. When the transmission fluid is cold, the sensor resistance is high. As the transmission fluid warms up, the sensor resistance decreases. This diagnostic monitors the TFT sensor circuit. The circuit may be functional but not in the normal operating range. This diagnostic indicates stuck, erratic, intermittent, or skewed values, resulting in reduced system performance. The TFT sensor range is -40 to +150°C (-40 to +304°F).
Conditions for Running the DTC
| • | No ECT DTCs P0117 or P0118. |
| • | No ISS DTCs P0716 or P0717. |
| • | No VSS DTCs P0722 or P0723. |
| • | DTC P0711 has not passed this ignition cycle. |
| • | The TFT is -39 to +149°C (-38 to +300°F). |
Condition 1
| • | The engine coolant temperature (ECT) is at least 70°C (158°F) and has changed by 55°C (99°F) since start-up. |
| • | The vehicle speed is 8 km/h (5 mph) or greater for at least 5 minutes cumulative. |
| • | The TCC slip is 120 RPM or greater for at least 5 minutes cumulative. |
Condition 2
| • | The ECT is at least 70°C (158°F) and has changed by 55°C (99°F) since start-up. |
| • | The vehicle speed is 8 km/h (5 mph) or greater for at least 5 minutes cumulative. |
Condition 3
| • | The calc. throttle position is between 8 and 90 percent. |
| • | The engine torque is 50 N·m (37 lb ft) or greater. |
| • | The vehicle speed is 8 km/h (5 mph) or greater. |
| • | The engine speed is greater than 500 RPM. |
Conditions for Setting the DTC
Condition 1
The change in TFT is 2°C (4°F) or less when the TFT is -39 to +20°C (-38 to +68°F) at start-up for 80 seconds.
Condition 2
The change in TFT is 2°C (4°F) when the TFT is 129-149°C (264-300°F) at start-up for 80 seconds.
Condition 3
The change in TFT is 20°C (68°F) or less after a predetermined time.
Action Taken When the DTC Sets
| • | DTC P0711 is a type C DTC. |
| • | The transmission control module (TCM) freezes transmission adaptive functions. |
| • | The TCM calculates a default TFT from the ECT sensor and the IAT sensor. |
Conditions for Clearing the DTC
DTC P0711 is a type C DTC.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
DTC Type Reference
Special Tools Required
J 44152 Jumper Harness (20 pins)
Circuit/System Verification
Drive the vehicle while observing the Trans. Fluid Temp. parameter on the scan tool. The Trans. Fluid Temp. parameter should rise by 3°C (5°F) or greater.
Circuit/System Testing
- Start the engine and observe the Trans. Fluid Temp. parameter on the scan tool. Drive the vehicle while observing the Trans. Fluid Temp. parameter. The Trans. Fluid Temp. parameter should rise by 3°C (5°F).
- Disconnect the automatic transmission 20-way inline connector. Turn ON the ignition, with the engine OFF. Observe the Trans. Fluid Temp. parameter on the scan tool. The Trans. Fluid Temp. should display -40°C (-40°F).
- Using a DMM, measure the voltage on the TFT sensor signal circuit on the engine harness side of the automatic transmission 20-way inline connector and ground. The voltage should be near 5 volts.
- Measure the voltage between the TFT sensor signal circuit and the low reference circuit at the automatic transmission 20-way inline connector. The voltage should be near 5 volts.
- Using the J 44152 jumper harness (20 pins), measure the resistance between the TFT sensor signal circuit and the low reference circuit at the transmission side of the automatic transmission 20-way inline connector. Refer to Temperature Versus Resistance for the 3.5L engine or Temperature Versus Resistance for the 3.9L engine. The resistance should be between the specified range for the given temperature.
| ⇒ | If the Trans. Fluid Temp. does not rise by 3°C (5°F), turn OFF the ignition. |
| ⇒ | If the Trans. Fluid Temp. is -40°C (-40°F), replace the TFT sensor. |
| ⇒ | If the voltage is not near the specified value, repair the open or high resistance in the TFT sensor signal circuit. If an open or high resistance is not found, test the TCM. |
| ⇒ | If the voltage is not near the specified value, repair the open or high resistance in the low reference circuit. |
| ⇒ | If the resistance is not within the specified range for the given temperature, replace the TFT sensor. |
Component Testing
- Disconnect the automatic transmission 20-way inline connector and measure the resistance between the TFT sensor signal circuit and the low reference circuit. Refer to Temperature Versus Resistance for the 3.5L engine or Temperature Versus Resistance for the 3.9L engine for resistance values.
- Test the TCM for supplying the 5-volt reference circuit to the TFT sensor.
| ⇒ | If the resistance is not within the specified range for the given temperature, replace the TFT sensor. |
| ⇒ | If the TCM is not supplying a 5-volt reference to the TFT sensor, replace the TCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
| • | Control Module References for TCM replacement, setup, and programming |
