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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 >> Tow/Haul Switch/Indicator Always On or Inoperative >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition OFF, monitor the instrument cluster.
  2. Ignition ON, verify the Tow/Haul mode indicator momentarily illuminates, during the instrument cluster bulb check.
    • If the Tow/Haul indicator does not illuminate or is always ON 

      Refer to Circuit/System Testing.

    • If the Tow/Haul indicator does illuminate and is not always ON 
  3. Verify with a scan tool the Tow/Haul switch parameter changes from Inactive to Active and back to Inactive with each cycle of the switch.
    • If the parameter does not change states 

      Refer to Circuit/System Testing.

    • If the parameter does change states 
  4. Verify the Tow/Haul indicator on the instrument cluster turns ON and OFF with each switch activation.
    • If the indicator does not turn ON and OFF 

      Refer to Circuit/System Testing.

    • If the indicator turns ON and OFF 
  5. All OK.
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