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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 35 (Automatic Transaxle Diagnosis - 4T65-E) >> Diagnostic Tests >> DTC P0711: Transmission Fluid Temperature Sensor Circuit Performance >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Buick Regal, 2002 Buick Century, 2001 Buick Regal, and 2001 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you perform the diagnostic system check? If so, go to next step. If not, see DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Did you perform the transmission fluid checking procedure? If so, go to next step. If not, perform transmission fluid checking procedure. See appropriate AUTOMATIC article in TRANSMISSION SERVICING.
  3. Install a scan tool. Turn ignition on, engine off. Before clearing the DTCs, use the scan tool to record the failure records for reference. Using the CLEAR INFO function will erase the stored failure records from the PCM. Record the failure records. Clear the DTC. Drive the vehicle for at least 7 minutes. Using a scan tool, observe TRANS FLUID TEMP for rapid fluctuations in temperature. Record the temperature at the start and end of the trip. Did you record the temperatures? If so, go to next step.
  4. Did the transmission fluid temperature rise more than 2.7°F (1.5°C)? If so, go to next step. If not, go to step  6 .
  5. Turn ignition off. Disconnect the transaxle in-line 20-way connector (additional DTCs may set). Install the Jumper Harness (J 44152) on the engine side of the transaxle in-line 20-way connector. Install a 12-volt test light between terminals "L" and "M" of the transaxle in-line 20-way connector using a Connector Test Adapter Kit (J 35616-A). Turn on the ignition switch with the engine off. While observing the TRANS FLUID TEMP parameter on the scan tool, massage the engine wiring harness from the PCM connectors to the transaxle in-line 20-way connector. Does the transmission fluid temperature change by more than 36°F (20°C) in 0.20 seconds? If so, go to step  7 . If not, go to step  9 .
  6. Turn ignition off. Disconnect the transaxle in-line 20-way connector (additional DTCs may set). Turn ignition on, engine off. With a scan tool, observe the TRANS FLUID TEMP parameter. Does the transmission fluid temperature change more than 2.7°F (1.5°C) when the transaxle in-line 20-way connector is disconnected? If so, go to step  12 . If not, go to step  13 .
  7. Test the signal circuit (CKT 1227) of the TFT sensor for an intermittent open or short to ground between the PCM and the transaxle in-line 20-way connector. Did you find and correct the condition? If so, go to step  14 . If not, go to next step.
  8. Test the low reference circuit (CKT 2762) of the TFT sensor for an intermittent open or short to ground between the PCM and the transaxle in-line 20-way connector. Did you find and correct the condition? If so, go to step  14 . If not, go to step  13 .
  9. Test the signal circuit (CKT 1227) of the TFT sensor for an intermittent open or short to ground between the transaxle in-line 20-way connector and the TFT sensor. Did you find the condition? If so, go to step  11 . If not, go to next step.
  10. Test the low reference circuit (CKT 452) of the TFT sensor for an intermittent open or short to ground between the transaxle in-line 20-way connector and the TFT sensor. Did you find the condition? If so, go to next step. If not, go to step  12 .
  11. Replace the transaxle internal wiring harness assembly. See TRANSAXLE INTERNAL WIRING HARNESS  under REMOVAL & INSTALLATION. Did you complete the replacement? If so, go to step  14 .
  12. Replace the TFT sensor. See TRANSMISSION FLUID TEMPERATURE SENSOR  under REMOVAL & INSTALLATION. Did you complete the replacement? If so, go to step  14 .
  13. Replace the PCM. See POWERTRAIN CONTROL MODULE  under REMOVAL & INSTALLATION. Did you complete the replacement? If so, go to next step.
  14. Perform the following procedure to verify the repair:
    • Select DTC.
    • Select CLEAR INFO.
    • Drive the vehicle from a cool start, for at least 5 minutes. The rise in transmission fluid temperature must be at least 5.4°F (3°C) since start up, and the change in transmission fluid temperature must not be greater than 36°F (20°C) in 0.2 seconds for 14 times in 7 seconds.
    • Select SPECIFIC DTC.
    • Enter DTC P0711.

    Has the test run and passed? If so, system is okay. If not, go to step  1 .

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