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Home >> Cadillac >> 2016 >> CTS Base, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U0100 - U02FF (except U01B0): Control Module (See U Code List) >> Circuit/System Verification
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Circuit/System Verification

  1. Determine the device that is not communicating. Refer to Control Module U Code List .
  2. Verify that DTC U0073, U2100, U0074, U0075, U0077, U0078, U1814, U2099, B1325, B1330, B1370, B1380, B1424, B1440, B1441, B1517, C0800, C0899, C12E1, P0560 or P0562 is not set.
  3. Refer to Circuit/System Testing.
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