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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Engine Controls And Fuel - 6.0L (L96) - DTC P0010 To DTC P0341) >> Diagnostic Information And Procedures >> DTC P0117, P0118 Or P0119: Engine Coolant Temperature (ECT) Sensor Circuit >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On/Vehicle - In Service Mode
  2. Verify the scan tool parameter: ECT Sensor = -39 to 149°C (-38 to 300°F)
    • If not between -39 and 149°C (-38 and 300°F) 

      Refer to Circuit/System Testing below

    • Go to next step: If between -39 and 149°C (-38 and 300°F) 
  3. Verify the scan tool parameter: ECT Sensor = The value should not spike or drop out.

    Perform the action while monitoring the parameter:

    • Wiggle the harness and connector: B34 Engine Coolant Temperature Sensor
    • Wiggle the harness and connector: X3 @ K20 Engine Control Module
    • If the value spikes or drops out 

      Repair as necessary - Wiring/Terminal(s)/Electrical Connector(s)

    • Go to next step: If the value does not spike or drop out 
  4. 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.

    Verify the DTC does not set.

    • If the DTC sets 

      Refer to Circuit/System Testing below

    • Go to next step: If the DTC is not set 
  5. All OK.
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