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Home >> Cadillac >> 2018 >> Escalade ESV Platinum, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Automatic Transmission - 6L80 (MYC) Or 6L90 (MYD) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P0722 Or P0723: Output Speed Sensor Circuit >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban 3500 HD, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify the scan tool ISS/OSS Supply Voltage parameter displays OK.
    • If OK is not displayed 

      Refer to Circuit/System Testing.

    • Go to next step: If OK is displayed 
  3. Road test the vehicle.
  4. Verify the scan tool Transmission OSS parameter changes with vehicle speed and does not drop while operating the vehicle within 16 - 32 km/h (10 - 20 mph).
    • If the Transmission OSS does not vary with engine speed or drops out 

      Refer to Circuit/System Testing.

    • Go to next step: If the Transmission OSS does vary with engine speed and does not drop out 
  5. 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.
  6. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • Go to next step: If the DTC does not set 
  7. All OK.
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