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Home › Cadillac › 2016 › CTS V › Repair and Diagnosis › External Pages › Different car › Section 49 (Data Communication System (Coupe)) › Diagnostic Information and Procedures › DTC U0073 or U2100: Control Module Communication Bus/Controller Area Network (CAN) Bus/ECU LS Bus/ECU HS Bus › Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2015 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to Data Link References  to determine which serial data system is used for a specific control module.
  2. This DTC cannot be retrieved with a current status. Diagnosis is accomplished using the symptom Scan Tool Does Not Communicate with High Speed GMLAN Device , or Scan Tool Does Not Communicate with Low Speed GMLAN Device .
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