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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 184 (Automatic Transaxle - 4T65-E - DTC P0218 To DTC P0748) >> DTC P0713 (3.5L) >> Test Description

Test Description

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

  1. 3:  A value of 4.9-5.0 volts indicates the PCM and engine side of the wiring are good.
  2. 6:  A short to voltage greater than 5 volts would cause the TFT sensor to open.
  3. 9:  A short to the TFT sensor signal circuit and any other circuits in the transmission harness could cause the TFT sensor to open.
DTC P0713 (3.5L)

Step Action Value(s) Yes No
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Install a scan tool.
  2. Turn ON the ignition with the engine OFF.
    3. IMPORTANT: Before clearing the DTCs, use the scan tool in order to record the Failure Records for reference. Using the Clear DTC Information function will erase the stored Failure Records from the PCM.
  3. Record the Failure Records.
  4. Clear the DTCs.
  5. With a scan tool, observe the TFT Sensor parameter.
Does the scan tool display a TFT Sensor voltage less than the specified value?		 4.9 V Go to Testing for Intermittent Conditions and Poor Connections Go to Step 3 
3 
  1. Turn OFF the ignition.
  2. Disconnect the AT inline 20-way connector.
  3. Connect the J 44152  jumper harness to the engine side of the 20-way connector. See Special Tools .
  4. Using the J 35616  GM terminal test kit, connect a DMM between the TFT sensor signal circuit and the low reference circuit of the J 44152  jumper harness. See Special Tools .

    Refer to Automatic Transmission Inline 20-Way Connector End View .

  5. Turn ON the ignition with the engine OFF.
  6. Observe the voltage on the DMM.
Does the voltage measure within the specified range?		 4.9-5.0 V Go to Step 7  Go to Step 4 
4 Does the voltage in Step 3 measure more than the specified value? 5.0 V Go to Step 6  Go to Step 5 
5
  1. Test the signal circuit of the TFT sensor for an open between the PCM and the AT inline 20-way connector.
  2. Test the low reference circuit of the TFT sensor for an open between the PCM and the AT inline 20-way connector.
Refer to Testing for Continuity and Wiring Repairs .Did you find and correct the condition?		 - Go to Step 15  Go to Step 14 
6  Test the signal circuit of the TFT sensor for a short to voltage between the PCM and the AT inline 20-way connector.
Refer to Testing for a Short to Voltage and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 12  Go to Step 14 
7
  1. Turn OFF the ignition.
  2. Disconnect the AT inline 20-way connector. Additional DTCs may set.
  3. Install the J 44152  on the transmission side of the 20-way connector. See Special Tools .
  4. Using the DMM, measure the resistance between the TFT sensor signal circuit and the low reference circuit of the J 44152  . See Special Tools .

    Refer to Automatic Transmission Inline 20-Way Connector End View .

Is the resistance less than the specified value?		 100 K Ω Go to Step 9  Go to Step 8 
8
  1. Test the signal circuit of the TFT sensor for an open between the AT inline 20-way connector and the TFT sensor.
  2. Test the low reference circuit of the TFT sensor for an open between the AT inline 20-way connector and the TFT sensor.
Refer to Testing for Continuity .Did you find the condition?		 - Go to Step 11  Go to Step 9 
9  Measure the resistance between the TFT sensor signal circuit and all other terminals, except the low reference circuit, of the J 44152  . See Special Tools .
Is the resistance greater than the specified value?		 1,000 Ω - Go to Step 11 
10 Test the signal circuit of the TFT sensor for a short to voltage between the PCM and the AT inline 20-way connector.
Refer to Testing for a Short to Voltage and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 15  Go to Testing for Intermittent Conditions and Poor Connections
11 Replace the automatic transmission wiring harness assembly.
Refer to Wiring Harness Replacement .
Did you complete the replacement?		 - Go to Step 12  -
12 Was the engine harness repaired or the transmission harness replaced due to a short to power or other circuit? - Go to Step 13  Go to Step 15 
13 Replace the automatic transmission fluid temperature sensor.
Refer to Fluid Temperature Sensor Replacement .
Did you complete the replacement?		 - Go to Step 15  -
14 Replace the PCM.
Refer to Control Module References for replacement, setup and programming.
Did you complete the replacement?		 - Go to Step 15  -
15 Perform the following procedure in order to verify the repair:
  1. Select DTC.
  2. Select Clear DTC Information.
  3. Operate the vehicle under the following conditions:
    • Turn ON the ignition with the engine OFF.
    • Verify that the TFT sensor voltage is less than 4.92 volts for 6 minutes and 40 seconds.
  4. Select Specific DTC.
  5. Enter DTC P0713.

Has the test run and passed?		 - Go to Step 16  Go to Step 2 
16 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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