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Home >> Cadillac >> 2017 >> XT5 Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Data Communication System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC U1026: Lost Communication with Transfer Case Control Module >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify that DTC U0073, U0074, U0075, U0076, U0077, U0078, U2100, 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.
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