P0711

DTC P0711 (3.0L)

Circuit Description
The automatic Transmission Fluid Temperature (TFT) sensor is a negative coefficient thermistor. When the transmission fluid is cold, the sensor resistance is high. As the transmission fluid warms, the sensor resistance decreases. This diagnostic monitors the TFT circuit. The circuit may be functional, but not in the normal operating range. This diagnostic indicates stuck, erratic, intermittent, or skewed values, indicating poor system performance. The TFT range is -40 to + 151 °C (-40 to +305° F).

When the TCM detects an intermittent voltage or no voltage change in the TFT sensor circuit, DTC P0711 sets. DTC P0711 is a type C DTC.

Conditions for Running the DTC
^ No ECT DTCs P0117 or P0118.
^ No VSS DTCs P0502 or P0503.
^ No ISS DTCs P0716 or P0717.
^ The engine coolant temperature is greater than 70°C (158°F).
^ The engine coolant temperature has changed by greater than 55°C (131°F) since start-up.
^ The transmission fluid temperature at start-up is -40 to +21°C (-40 to +70°F).
^ The vehicle speed is greater than 8 km/h (5 mph) for 15 minutes cumulatively.
^ The TCC slip is greater than 120 RPM for 6 minutes and 49 seconds cumulatively.

Conditions for Setting the DTC
One of the following conditions occurs:

Condition 1
The change in transmission fluid temperature is less than 2.25°C (4°F) since start-up for 1 minute and 20 seconds.

Condition 2
The change in transmission fluid temperature is greater than 20°C (36°F) within 200 milliseconds; 15 times within 7 seconds.

Action Taken When the DTC Sets
^ The TCM does not request the ECM to illuminate the Malfunction Indicator Lamp (MIL).
^ The TCM requests the ECM to illuminate the Service Vehicle Soon (SVS) lamp.
^ The TCM freezes transmission adaptive functions.
^ The TCM calculates a default transmission fluid temperature based on engine coolant temperature, manifold air temperature, and engine run time.
^ The TCM records the operating conditions when the Conditions for setting the DTC are met. The TCM stores this information as Failure Records.
^ The TCM stores DTC P0711 in TCM history.

Conditions for Clearing the SVS Lamp/DTC
^ The TCM clears the SVS lamp request when the condition no longer exists.
^ A scan tool can clear the SVS Lamp/DTC.
^ The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non-emission-related diagnostic fault occurring.
^ The TCM cancels the DTC default actions when the fault no longer exists and the DTC passes.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
5. This step tests for an intermittent short or open condition in the engine wiring harness. The test light is used as a resistor in the circuit.
6. This step determines if the TCM or the TFT sensor is causing a steady, unchanging TFT reading.

Steps 1 - 6:

Steps 7 - 13:

DTC P0711 (3.0L)