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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 29 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - DTC P0218 To DTC P0785) >> DTC P0711 (M33 Only) >> Test Description

Test Description

WARNING: This page is about a different variant/trim than selected.

The numbers below refer to the step numbers on the diagnostic table.

  1. 5:  This step tests for an intermittent short or open condition in the engine wiring harness. The test lamp is used as a resistor in the circuit.
  2. 6:  This step determines if the PCM or the TFT sensor is causing a steady, unchanging TFT reading.
DTC P0711 (M33 Only)

Step Action Values Yes No
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2 Inspect for correct transmission fluid level.
Refer to Transmission Fluid Checking Procedure .
Did you perform the fluid checking procedure?		 - Go to Step 3  Go to Transmission Fluid Checking Procedure
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 Failure Records. Using the Clear Info function erases the Failure Records from the PCM.
  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 either of the following conditions:
    • The Trans. Fluid Temp. does not change more than 1.50°C (2.7°F) in 409 seconds since startup.
    • The Trans. Fluid Temp. changes more than 20°C (36°F) in 200 milliseconds 14 times within 7 seconds.
Did either of the conditions occur?		 - Go to Step 4  Go to Testing for Intermittent Conditions and Poor Connections
4 Did the scan tool display a condition in which the Trans. Fluid Temp. does not change by more than the specified value in 409 seconds since startup? 1.50°C (2.7°F) Go to Step 6  Go to Step 5 
5
  1. Turn OFF the ignition.
  2. Disconnect the AT inline 20-way connector, additional DTCs may set.
  3. Install the J 44152  Jumper Harness (20 pins) on the engine side of the AT inline 20-way connector. See Special Tools .
  4. Using the J 35616  GM Terminal Test Kit, connect a test lamp between the TFT sensor signal and low reference circuits of the J 44152  . See Special Tools .

    Refer to Automatic Transmission Inline 20-Way Connector End View (M30/M32) or Automatic Transmission Inline 20-Way Connector End View (M33 Only) .

  5. Turn ON the ignition, with the engine OFF.
  6. While observing the scan tool display, move or wiggle the engine wiring harness from PCM to the AT inline 20-way connector.
Does the scan tool Trans. Fluid Temp. change by more than the specified value?		 20°C (36°F) Go to Step 7  Go to Step 8 
6
  1. Turn OFF the ignition.
  2. Disconnect the AT inline 20-way connector.
  3. Turn ON the ignition, with the engine OFF.
Does the scan tool display the same condition as in Step 4?		 - Go to Step 11  Go to Step 10 
7
  1. Test the signal circuit of the TFT sensor for an intermittent open or short condition between the PCM and the AT inline 20-way connector.
  2. Test the low reference circuit of the TFT sensor for an intermittent open or short condition.
Refer to Circuit Testing and Wiring Repairs .Did you find and correct the condition?		 - Go to Step 12  Go to Step 11 
8
  1. Test the signal circuit of the TFT sensor for an intermittent open or short condition between the AT inline 20-way connector and the TFT sensor.
  2. Test the low reference circuit of the TFT sensor for an intermittent open or short condition.
Refer to Circuit Testing and Wiring Repairs .Did you find an intermittent open or short condition?		 - Go to Step 9  Go to Step 10 
9 Replace the AT wiring harness assembly.
Refer to Valve Body and Pressure Switch Replacement .
Did you complete the replacement?		 - Go to Step 12  -
10 Replace the TFT sensor, this sensor is part of the TFP manual valve position switch.
Refer to Valve Body and Pressure Switch Replacement .
Did you complete the replacement?		 - Go to Step 12  -
11 Replace the PCM.
Refer to Control Module References .
Did you complete the replacement?		 - Go to Step 12  -
12 Perform the following procedure in order to verify the repair:
  1. Select DTC.
  2. Select Clear Info.
  3. Drive the vehicle and ensure that the following conditions are met:
    • The Trans. Fluid Temp. changes by more than 2.25°C (4°F) for 11 seconds since startup
    • The Trans. Fluid Temp. does not change by more than 20°C (36°F) within 200 milliseconds for a period of at least 11 seconds
  4. Select Specific DTC.
  5. Enter DTC P0711.

Has the test run and passed?		 - Go to Step 13  Go to Step 2 
13 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?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
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