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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 404 (Engine Controls And Fuel - 6.2L (LT4) - Diagnostic Information And Procedures (3 Of 3)) >> Diagnostic Information And Procedures >> Electronic Ignition System Diagnosis >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.

T8 Ignition Coil

  1. Ignition/Vehicle - Off
  2. Swap the two components: T8 Ignition Coil - The original component that set the DTC & Another known good component from the vehicle
  3. Engine - Running
  4. Verify the scan tool parameter: Cylinder 1 - 8 Current Misfire Counter = Increments - At the original component location the DTC set.
    • If the parameter value does not increment 

      Replace the component: T8 Ignition Coil - The original component that set the DTC

    • Go to next step: If the parameter value increments 
  5. Refer to: Circuit/System Testing