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Home >> Chevrolet >> 2017 >> Volt Premier >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Data Communication System - DTC U1817 To DTC U3012 And Scan Tool Symptoms >> Diagnostic Information and Procedures >> DTC U1879: Drive Motor Control Module 2 Lost Communication with Engine Control Module >> Circuit/System Verification

Circuit/System Verification

  1. Vehicle in Service Mode.
  2. Verify that DTC U0100 is not set.
    • If DTC U0100 is not set 
  3. Verify that DTC U0073, U0074, U0077, U0078, U007A, P06E4, P1EB9, 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 
  4. Refer to Circuit/System Testing.
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