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Home >> Cadillac >> 2017 >> CTS V >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Automatic Transmission - 8L45 (M5N) Or 8L90 (M5U) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P281D or P281E: Transmission Control Solenoid Valve 8 Control Circuit >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2016 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition On.
  2. Verify the parameters listed below do not display Malfunction when commanding the Transmission Control Solenoid Valve 8 On and Off with a scan tool.
    • Transmission Control Solenoid Valve 8 Control Circuit Open Voltage Test Status
    • Transmission Control Solenoid Valve 8 Control Circuit Low Voltage Test Status
    • Transmission Control Solenoid Valve 8 Control Circuit High Voltage Test Status
    • If Malfunction is displayed 

      Refer to Circuit/System Testing.

    • If Malfunction is not displayed 
  3. 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.
  4. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

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