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Home >> Cadillac >> 2017 >> Escalade ESV Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Automatic Transmission - 6L80 (MYC) Or 6L90 (MYD) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P071A: Transmission Tow Mode Switch Circuit >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON, cycle the S74 Tow/Haul Mode switch while observing the Tow/Haul switch parameter on the scan tool in the Transmission Controls Data list. The S74 Tow/Haul Mode switch parameter should change states from Inactive to Active with each cycle of the switch.
    • If the Tow/Haul Mode switch parameter does not change from Inactive to Active 

      Refer to Circuit/System Testing.

    • If the Tow/Haul Mode switch parameter does change from Inactive to Active 
  2. 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.
  3. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

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