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Home >> GMC >> 2005 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 213 (Automatic Transmission - 5L40-E/5L50-E - (DTC P0757 To DTC P1833)) >> DTC P0976 >> Test Description

Test Description

WARNING: This page is about a different car, the 2005 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 2:  Listen for an audible click when the solenoid energizes.
DTC P0976

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 in Vehicle DTC Information
2 
  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 Freeze Frame and the TCM Failure Records. Using the Clear Info function erases the Freeze Frame and Failure Records from the ECM and the TCM.
    • Using the Clear Info function erases stored DTCs in both the ECM and TCM.
  3. Record the DTC Freeze Frame and Failure Records.
  4. Clear the DTC.
  5. Use the scan tool in order to command the 2-3 shift solenoid ON.
Does the solenoid operate?		 - Go to Step 9  Go to Step 3 
3
  1. Turn OFF the ignition.
  2. Disconnect the AT 20-way inline harness connector.
  3. Install the J 45681  jumper harness to the TCM side of the 20-way connector. See Special Tools .
  4. Turn ON the ignition with the engine OFF.
  5. With the test lamp connected to ground, probe the solenoid supply voltage circuit of the J 45681  . See Special Tools .
Does the test light illuminate?		 - Go to Step 4  Go to Step 7 
4
  1. Turn OFF the ignition.
  2. Install the J 45681  to the transmission side of the 20-way connector. See Special Tools .
  3. Using the DMM, measure the resistance between the solenoid supply voltage circuit and the 2-3 shift solenoid valve control circuit of the J 45681  . See Special Tools .

    Refer to Component Resistance .

Is the resistance within the specified range?		 15.0-20.3ohm Go to Step 5  Go to Step 8 
5 Using the DMM, measure the resistance between the solenoid supply voltage circuit of the J 45681  and ground. See Special Tools .
Is the resistance greater than the specified value?		 50K ohm Go to Step 6  Go to Step 8 
6
  1. Disconnect the TCM.
  2. Test the 2-3 shift solenoid valve control circuit for an open or short to ground.
Refer to Testing for Continuity andTesting for Short to Ground in Wiring Systems.Did you find and correct the condition?		 - Go to Step 12  Go to Step 9 
7
  1. Turn OFF the ignition.
  2. Disconnect the TCM.
  3. Test the 2-3 SS valve control circuit from the TCM to the 20-way connector for an open circuit. Refer to Testing for Continuity in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 12  Go to Step 9 
8
  1. Remove the transmission oil pan.
  2. Test the 2-3 SS valve control circuit from the 20-way connector to the 2-3 shift solenoid connector for an open or short to ground.
Refer to Testing for Continuity andTesting for Short to Ground in Wiring Systems.Did you find a condition?		 - Go to Step 10  Go to Step 11 
9 Replace the TCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Is the action complete?		 - Go to Step 12  -
10 Replace the AT internal transmission wiring harness. Refer to Transmission Internal Electrical Harness Replacement .
Is the action complete?		 - Go to Step 12  -
11 Replace the 2-3 shift solenoid valve. Refer to 2-3 Shift Solenoid Replacement .
Is the action complete?		 - Go to Step 12  -
12 Perform the following procedure in order to verify the repair:
  1. Select DTC.
  2. Select Clear Info.
  3. Turn ON the ignition, with the engine OFF.
  4. Select Specific DTC.
  5. Enter DTC P0976.

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 in Vehicle DTC Information System OK
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