Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

Ignition - On / Vehicle - In Service Mode
Verify the appropriate scan tool parameter: Engine Coolant Temperature Sensor or Engine Coolant Temperature Sensor 2, 5, 6 =-39 to 139°C (-38 to 282°F)
- If not between -39 and 139°C (-38 and 282°F)
  Refer to: Circuit/System Testing
- Go to next step: If between -39 and 139°C (-38 and 282°F)
Verify the scan tool parameter: Engine Coolant Temperature Sensor or Engine Coolant Temperature Sensor 2, 5, 6 = The parameter value should not change
NOTE:
For component location, refer to: Repair Instructions

Perform the action while monitoring the parameter:
- Wiggle the harness and connector: B34A Engine Coolant Temperature Sensor 1
- Wiggle the harness and connector: B34B Engine Coolant Temperature Sensor 2
- Wiggle the harness and connector: B34E Engine Coolant Temperature Sensor 5
- Wiggle the harness and connector: B34F Engine Coolant Temperature Sensor 6
- Wiggle the harness and connector: K20 Engine Control Module
- If the parameter value changes
  Repair as necessary - Wiring / Terminal (s) / Electrical Connector (s)
- Go to next step: If the parameter value does not change
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
All OK.