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Home >> Cadillac >> 2021 >> CT5 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls And Fuel - 3.0L (LGY) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P103B or P103C >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: X2 @ K20 Engine Control Module
  3. Test circuit 5294 for an open/high resistance between the test points: Ignition circuit terminal X2 37 @ Control module harness & Output terminal @ Fuse
    • If 2 Ω or greater 

      Repair the open/high resistance in the circuit:

    • Go to next step: If less than 2 Ω 
  4. Replace the component: K20 Engine Control Module
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