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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1994 (Automatic Transmission - 6T75 - DTC P0218 To DTC P0977) >> DTC P0776 or P0777 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, remove the line pressure test hole plug and install the J 21867  to the transmission.
  2. Perform the Line Pressure Check . Verify the transmission line pressure gage is within the range specified in the Line PC Solenoid Valve Pressure table. Refer to Solenoid Valve Pressure .
  3. Ignition OFF, remove the control solenoid (w/body and TCM) valve assembly.
  4. Install the DT-47825  to the control solenoid (w/body and TCM) valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test for detailed instructions.
  5. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test . A pressure change should occur.
    • If a pressure change does not occur, replace the control solenoid (w/body and TCM) valve assembly.
  6. Inspect for the following conditions and repair/replace as necessary:
    • The control valve lower body assembly for sticking valves, damage, scored bores, or debris
    • The 3-5-R clutch assembly for damage
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