P0711

DTC P0711





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 up, 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 or skewed, inaccurate values, indicating poor system performance. The TFT range is -40 to +151°C (-40 to +305°F).

If the transmission control module (TCM) detects no voltage change in the TFT sensor circuit, then DTC P0711 sets. DTC P0711 is a type A DTC.

DTC Descriptor
This diagnostic procedure supports the following DTC:

DTC P0711 Transmission Fluid Temperature (TFT) Sensor Performance

Conditions for Running the DTC
^ Trans. Protection Mode is OFF.
^ Vehicle speed is greater than 40 Km/hr.
^ The transmission range switch is DRIVE, INTERMEDIATE, LOW or REVERSE.
^ The TFT at start-up is less than 20°C (68°F).

Conditions for Setting the DTC
The TFT has not changed by more than 5°C (9°F) since start-up for 900 seconds (15 minutes).

Action Taken When the DTC Sets
^ The TCM requests the powertrain control module (PCM) to illuminate the malfunction indicator lamp (MIL).
^ DTC P1719 is disabled.
^ No lock-up slip neutral control or uphill/downhill control until transmission fluid temperature is greater than 40°C (104°F) for 5 seconds.
^ The TCM discontinues updating the transmission adaptive pressure (TAP) memory cells.
^ The TCM uses 30°C (86°F) as a default transmission fluid temperature.
^ The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Freeze Frame and Failure Records.
^ The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as a Failure Record.
^ The TCM stores DTC P0711 in TCM history.

Conditions for Clearing the MIL/DTC
^ The PCM turns off the MIL after the third consecutive drive trip in which the TCM does not send a MIL illumination request.
^ A scan tool can clear the DTC.
^ The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without an emission-related diagnostic fault occurring.
^ The TCM cancels the DTC default actions when the ignition switch is OFF long enough in order to power down the TCM.

Test Description

Step 1 - Step 8:

The number below refers to the step number on the diagnostic table.
4. This step determines if the TCM or the TFT, sensor is causing a steady, unchanging TFT, reading.