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Home >> Buick >> 2016 >> Envision >> Repair and Diagnosis >> External Pages >> Different car >> Section 194 (Data Communication System - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC U1876: Drive Motor Control Module 1 Lost Communication with Engine Control Module Malfunction >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2016 Buick LaCrosse. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify that DTC U0100 is not set.
    • If DTC U0100 is not set 
  3. Verify that DTC U0073, U0074, U1814, B1428, B1370, B1380, B1440, B1441, B1325, or P0562 is not set.
    • If none of the DTCs are set 
  4. Refer to Circuit/System Testing.
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