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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1775 (Automatic Transaxle - AF33-5 (DTC P0962 - P1868)) >> Diagnostic Information & Procedures >> DTC P0977 >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 5:  This step determines if the shift solenoid has a poor ground connection.
DTC P0977

Step Action Values Yes No
1 Did you perform the Diagnostic System Check - Engine Controls? - Go to Step 2  Go to DIAGNOSTIC SYSTEM CHECK -- ENGINE CONTROLS
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 Freeze Frame and Failure Records. Using the Clear Eng./Trans. DTC Info function erases the Freeze Frame and Failure Records from the TCM.
  3. Record the DTC Failure Records.
  4. Clear the DTC.
  5. Command Shift Solenoid 2 OFF with a scan tool.
  6. Observe Shift Solenoid 2 CKT Status with a scan tool.
Is Shift Solenoid 2 CKT Status OK?		 - Go to INTERMITTENTS Go to Step 3 
3
  1. Disconnect the transmission AT inline 14-way connector.
  2. Probe terminal 7 with a test lamp connected to a good ground.
  3. Command Shift Solenoid 2 ON and OFF with a scan tool.
Does the test lamp turn ON and OFF?		 - Go to Step 4  Go to Step 7 
4 Inspect for poor connections at the transmission AT inline 14-way connector.
Did you find and correct the condition?		 - Go to Step 12  Go to Step 5 
5 
  1. Remove the control valve body cover.
  2. Inspect the 2-3, 3-4 SS valve (S2) mounting bolt (307) for proper tightness.
Did you find and correct the condition?		 - Go to Step 12  Go to Step 6 
6
  1. Disconnect the light gray 1-way connector from the 2-3, 3-4 SS valve (S2).
  2. Test the shift solenoid 2 control circuit (1223) for an open or short to another circuit.
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.Did you find and correct the condition?		 - Go to Step 12  Go to Step 10 
7
  1. Disconnect the TCM C2 connector.
  2. Test the shift solenoid 2 control circuit (1223) for an open or short to voltage.
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.Did you find and correct the condition?		 - Go to Step 12  Go to Step 8 
8 Inspect the TCM C2 connector for poor connections.
Did you find and correct the condition?		 - Go to Step 12  Go to Step 11 
9 Replace the automatic transmission wiring harness. Refer to Wiring Harness Removal .
Did you complete the replacement?		 - Go to Step 12  -
10 Replace the 2-3, 3-4 SS valve (S2).
Refer to Control Valve Body Assembly Disassemble .
Did you complete the replacement?		 - Go to Step 12  -
11 Replace the TCM.
Refer to Transmission Control Module (TCM) Replacement .
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. Operate the vehicle.
  4. Select Specific DTC.
  5. Enter DTC P0977.

Does the DTC reset?		 - Go to Step 2  Go to Step 13 
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 DEFINITIONS System OK
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