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Home >> GMC >> 2022 >> Hummer EV >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Hybrid/EV Energy Storage - Diagnostic Information And Procedures (2 Of 2) >> Diagnostic Information and Procedures >> DTC U3687-U3689 >> Circuit/System Verification

Circuit/System Verification

  1. Vehicle in Service Mode.
  2. Verify DTC U3689 is not set.
    • If the DTC is set 

      Refer to Circuit/System Testing

    • Go to next step: If the DTC is not set 
  3. Verify DTC U3687 or U3688 is not set.
    • If any of the DTCs are set 
    • If the customer complaint was aborted DC fast charge, advise customer that the charge station had a fault. Advise the customer to report a problem with the charge station.
    • Go to next step: If none of the DTCs are set 
  4. All OK.
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