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Home >> Chevrolet >> 2017 >> Traverse LS Base >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U0100 - U02FF: Control Module >> Circuit/System Verification
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Circuit/System Verification

  1. Determine the control module that is not communicating. Refer to Control Module U Code List .
  2. Verify that DTC U0073, U2100, U0074, U0078, U1814, U2099, B1325, B1330, B1370, B1380, B1424, B1428, B1440, B1441, B1517, C0800, C0899, C12E1, P0560, or P0562 is not set.
  3. Engine running for 10 seconds.
  4. Ignition ON, engine OFF, verify that DTC U0100-U02FF is not set with symptom byte 00.
    • If the DTC U0100-U02FF is set with symptom byte 00, refer to Circuit/System Testing.
  5. Verify that DTC U0100-U02FF is not set with symptom byte 71 or 72.
    • If the DTC U0100-U02FF is set with symptom byte 71 or 72 along with other DTCs set, diagnose all other codes first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
    • If the DTC U0100-U02FF is set with symptom byte 71 or 72 and without other DTCs set, reprogram the control module. If the DTC resets, replace the control module.
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