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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Controls And Fuel - 2.7L (L3B) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P111E or P149A-P149E >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition/Vehicle - Off
  2. Disconnect the appropriate electrical connector: B34 Engine Coolant Temperature Sensor
  3. Test the resistance between the test points: Signal terminal 1/A & Low Reference terminal 2/B

    Verify the value is within the range listed in the table: Temperature Versus Resistance - Engine Coolant Temperature Sensor

    • If not in the specified range 

      Replace the component: B34 Engine Coolant Temperature Sensor

    • Go to next step: If in the specified range 
  4. Test for infinite resistance between the test points: Each terminal of the component & The component's housing
    • If less than infinite resistance 

      Replace the component: B34 Engine Coolant Temperature Sensor

    • Go to next step: If infinite resistance 
  5. All OK.
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