Circuit/System Verification
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition - On / Vehicle - In Service Mode
- 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
- Go to next step: If between -39 and 149°C (-38 and 300°F)
- If not between -39 and 149°C (-38 and 300°F)
- 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: X2 @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
- 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
- Go to next step: If the DTC is not set
- If the DTC sets
- All OK.