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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls And Fuel - 2.7L (L3B) - Diagnostic Information And Procedures (1 Of 2)) >> Diagnostic Information and Procedures >> DTC P02EE-P02F1, P10A3-P10A9, P10AA, P2B00-P2B03, P2B08, P2B09, P2B0A, P2B0B, P2B95, P2B96, or P30D4 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. If DTC P10A3, P10A4, P10A5, P10A6, P10A7, P10A8, P10A9, P10AA is set and no other DTCs are set
    • Replace the appropriate component: Q17 Fuel Injector
    • Go to next step: If other DTCs are set - DTCs listed in the DTC Descriptor Category
  2. Ignition/Vehicle - Off
  3. Disconnect the appropriate component: Q17 Fuel Injector
    4. NOTE:

    The specified resistances are valid for components at room temperature.

  4. Test for 2 to 3 ohms between the test points: Control circuit terminal 1 & Control circuit terminal 2
    • If not between 2 and 3 ohms 

      Replace the component: Q17 Fuel Injector

    • Go to next step: If between 2 and 3 ohms 
  5. Disconnect the electrical connector: X3 @ K20 Engine Control Module
  6. Test for less than 2 ohms between the test points: Control circuit terminal 1 @ Component harness &
    • {Q17A Fuel Injector 1} Terminal 70 @ Control module harness
    • {Q17B Fuel Injector 2} Terminal 52 @ Control module harness
    • {Q17C Fuel Injector 3} Terminal 72 @ Control module harness
    • {Q17D Fuel Injector 4} Terminal 50 @ Control module harness
    • If 2 ohms or greater - Repair the open/high resistance in the circuit. 
    • Go to next step: If less than 2 ohms 
  7. Test for less than 2 ohms between the test points: Control circuit terminal 2 @ Component harness &
    • {Q17A Fuel Injector 1} Terminal 69 @ Control module harness
    • {Q17B Fuel Injector 2} Terminal 51 @ Control module harness
    • {Q17C Fuel Injector 3} Terminal 71 @ Control module harness
    • {Q17D Fuel Injector 4} Terminal 49 @ Control module harness
    • If 2 ohms or greater - Repair the open/high resistance in the circuit. 
    • Go to next step: If less than 2 ohms 
  8. Replace the appropriate component: = Q17 Fuel Injector - Monitor the scan tool parameter: Misfire Data
  9. 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.
  10. Verify the DTC does not set.
    • If the DTC sets 

      Replace the component: K20 Engine Control Module

    • Go to next step: If no DTC is set 
  11. All OK.
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