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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 250 (Automatic Transmission - 6L50/6L80/6L90 - DTC P0218 To DTC P0971) >> DTC P0741 or P0742 >> Component Testing

Component Testing

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  1. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning in an attempt to clean or free up a potential sticking valve of dirt or debris.
  2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test to test for a stuck open or stuck closed TCC PC solenoid valve inside of the control solenoid (w/body and TCM) valve assembly.
    • If a stuck open or closed valve is found, replace the control solenoid (w/body and TCM) valve assembly.
  3. Inspect the lower control valve body for a stuck valve, debris or damage.
    • If you found a valve body concern, repair or replace the lower control valve body as necessary.
  4. Inspect the TCC control valve in the pump.
    • If you found a TCC control valve concern, repair or replace the TCC control valve or pump as necessary.
  5. Inspect the torque converter assembly for damage or discoloration.
    • If you found a torque converter assembly concern, replace the torque converter assembly as necessary.
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