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Home >> Chevrolet >> 2017 >> City Express LS >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Data Communication System >> Diagnostic Information And Procedures >> DTC U0300: Internal Control Module Software Incompatibility >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON.
  2. Verify DTC U0300 is not set.
    • If DTC U0300 is set 
    1. Program a device that was recently replaced before DTC U0300 is detected.
    2. Verify the DTC does not set.
      • If the DTC sets, replace that device.
      • Go to next step: If the DTC does not set
    3. All OK.
    • Go to next step: If DTC U0300 is not set 
  3. All OK
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