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Home >> GMC >> 2017 >> Acadia SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 197 (Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0746 or P0747: Transmission Control Solenoid Valve 1 Stuck >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the transmission fluid level and condition is correct. Refer to Transmission Fluid Level and Condition Check .
    • If the transmission fluid and condition is not correct 

      Repair as necessary.

    • If the transmission fluid level and condition is correct 
  2. Ignition On, clear the DTCs from the K71 Transmission Control Module with a scan tool.
  3. Verify the transmission operation performs as indicated in the road test instructions and DTC P0746 or P0747 did not set. Refer to Road Test .
    • If DTC P0746 or P0747 did set and the transmission does not shift correctly 

      Refer to Circuit/System Testing.

    • If DTC P0746 or P0747 did not set and the transmission shifts correctly 
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observe from the Freeze Frame/Failure Records data.
  5. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • If the DTC does not set 
  6. All OK.
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