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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Engine Controls And Fuel - 5.3L (L83) Or 6.2L (L86) - DTC P0443 To DTC P3452 And Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P1248, P1249, P124A, P124B, P124C, P124D, P124E, P124F: Cylinder Injector High Control Circuit Shorted To Control Circuit >> Circuit/System Verification

Circuit/System Verification

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify DTC P062B is not set.
    • Go to next step: If the DTC is not set 
  3. Engine idling.
    NOTE: The engine must be running for the injector circuit status parameters to function.
  4. Verify with a scan tool parameters listed below display OK or Not Run.
    • Cylinder 1 Injector Control Circuit Status
    • Cylinder 2 Injector Control Circuit Status
    • Cylinder 3 Injector Control Circuit Status
    • Cylinder 4 Injector Control Circuit Status
    • Cylinder 5 Injector Control Circuit Status
    • Cylinder 6 Injector Control Circuit Status
    • Cylinder 7 Injector Control Circuit Status
    • Cylinder 8 Injector Control Circuit Status
    • If OK or Not Run is not displayed 

      Refer to Circuit/System Testing below.

    • Go to next step: If OK or Not Run is displayed 
  5. 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.
  6. Verify the DTC does not set
    • If the DTC set 

      Refer to Circuit/System Testing below.

    • Go to next step: If the DTC does not set 
  7. All OK.
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