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Home >> Chevrolet >> 2018 >> Spark LS, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> System >> Data Communications System >> Diagnostic Information and Procedures >> DTC U3000 >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON/Vehicle In Service Mode, engine OFF.
  2. Verify DTC U3000 is not set.
    • If DTC U3000 is set with symptom byte 43, 47, or 4B 
    1. Program the device that sets the DTC.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the device that sets the DTC.
      • Go to next step: If the DTC does not set
    3. All OK.
    • If DTC U3000 is set with any symptom byte, except 43, 47, or 4B 

      Replace the device that sets the DTC.

    • Go to next step: If DTC U3000 is not set 
  3. All OK
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