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For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2003 🢒 ION 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - AF23-5 🢒 DTC P0711

Object Number: 882349 Size: MF
OBD II Symbol Description Notice

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 TCM detects no voltage change in the TFT sensor circuit, then DTC P0711 sets. DTC P0711 is a type A DTC.

Conditions for Running the DTC
    • No DTC P0712 or P0713.
    • The transmission range switch is DRIVE, INTERMEDIATE, LOW or REVERSE.
    • The TFT at startup 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 startup for 900 seconds (15 minutes).

Action Taken When the DTC Sets
    • The TCM requests the engine control module (ECM) to illuminate the malfunction indicator lamp (MIL).
    • DTC P01719 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 ECM records the operating conditions when the Conditions for Setting the DTC are met. The ECM 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 ECM 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

The number below refers to the step number on the diagnostic table.

  1. This step determines if the TCM or the TFT, sensor is causing a steady, unchanging TFT, reading.

Step

Action

Values

Yes

No

Schematic Reference: Automatic Transmission Controls Schematics

Connector End View Reference: Automatic Transmission Inline Harness Connector End View

1

Did you perform the Diagnostic System Check - Engine Controls?

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Go to Step 2

Go to Diagnostic System Check - Engine Controls in Engine Controls - 2.2L (L61)

2

Perform the Transmission Fluid Checking Procedure. Refer to Transmission Fluid Check .

Did you perform the Transmission Fluid Checking Procedure?

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Go to Step 3

Go to Transmission Fluid Check

3
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.

    3. Important: 

       • Before clearing the DTC, use the scan tool in order to record the ECM and the TCM Failure Records. Using the Clear Eng./Trans. DTC Info function erases the Failure Records from the ECM and TCM.
       • Using the Clear Eng./Trans. DTC Info function erases stored DTCs in both the ECM and TCM.

  3. Record the DTC Failure Records.
  4. Clear the DTC.
  5. Select Trans. Fluid Temp. on the scan tool.
  6. Drive the vehicle and observe the scan tool for the following condition:

    7. The Transmission Fluid Temperature (TFT) sensor does not change greater than 5°C (9°F) in 15 minutes since startup.

Did the condition occur?

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Go to Step 4

Go to Intermittent Conditions in Engine Controls - 2.2L (L61)

4

  1. Turn OFF the ignition.
  2. Disconnect the AT inline 14-way connector.
  3. Turn ON the ignition, with the engine OFF.

Did the scan tool display a condition in which the Trans. Fluid Temp. does not change by greater than the specified value in 15 minutes since startup?

5°C (9°F)

Go to Step 6

Go to Step 5

5

Replace the automatic transmission wiring harness. Refer to Wiring Harness Removal .

Did you complete the replacement?

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Go to Step 7

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6

Replace the TCM. Refer to Transmission Control Module Replacement .

Did you complete the replacement?

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Go to Step 7

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7

Perform the following procedure in order to verify the repair:

  1. Select DTC.
  2. Select Clear Info.
  3. Drive the vehicle and ensure the following conditions are met:
    4. • The TFT is -39°C to +149°C (-38°F to +300°F).
    • The TFT changes by greater than 5°C (9°F) since startup.
  4. Select Specific DTC.
  5. Enter DTC P0711.

Has the test run and passed?

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Go to Step 8

Go to Step 2

8

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?

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Go to Diagnostic Trouble Code (DTC) List in Engine Controls - 2.2L (L61)

System OK