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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 >> Fuel Injector Circuit Diagnosis >> 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.
NOTE: Do Not perform this procedure unless directed here from the Fuel Injector Balance Test.
  1. Engine idling.
  2. Verify the scan tool Cylinder 1 - 8 Current Misfire Counter parameters do not increment.
    • If the Cylinder 1 - 8 Current Misfire Counters increment 

      Refer to Circuit/System Testing below.

    • Go to next step: If the Cylinder 1 - 8 Current Misfire Counters do not increment 
  3. Verify the scan tool Cylinder 1 - 8 Injector Control Circuit Status parameters display OK.
    • If the Cylinder 1 - 8 Injector Control Circuit Status parameters do not display OK 

      Refer to Circuit/System Testing below.

    • Go to next step: If the Cylinder 1 - 8 Injector Control Circuit Status parameters display OK 
  4. All OK.
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