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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 167 (Engine Controls And Fuel - 3.6L (LGX LF4) - DTC P0650 To DTC P3436 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P16A7, P16AF, or P16B3: Engine Controls Ignition Relay Feedback (LGX) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:
    • A short to voltage on other components may cause DTC P16B3 to set. If any other DTC is set, diagnose that DTC first.
    • If you were sent here from Engine Cranks But Does Not Run, proceed to Circuit/System Testing.
  1. Ignition ON, observe the scan tool DTC information. Verify DTC P16A7, P16AF, or P16B3 is not set.
    • If any of the DTCs are set 

      Refer to Circuit/System Testing.

    • If none of the DTCs are set 
  2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • If the DTC does not set 
  3. All OK.
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