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Home >> Cadillac >> 2017 >> XT5 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Data Communication System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC U18AC: Transmission Range Control Module Lost Communication with Chassis Control Module on Chassis Expansion CAN Bus >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify that DTC U0073, U0074, U0077, U1814, U2099, B1325, B1330, B1370, B1380, B1424, B1428, B1440, B1441, B1517, C0800, C0899, C12E1, P0560, or P0562 is not set.
    • If none of the DTCs are set 
  3. Refer to Circuit/System Testing.