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.

Using an Infrared Temperature Gun

Engine running, all accessories OFF.
Verify the steering wheel heater switch is OFF and the steering wheel heater indicator should not be illuminated.
- If the heater indicator is illuminated
  Refer to Heated Steering Wheel Indicator Malfunction
- Go to next step: If the heater indicator is not illuminated
NOTE:
The Infrared Temperature Gun should be within 50.8mm (2 in) and parallel to the steering wheel rim when taking temperature readings.

Measure the temperature readings at the 3 and 9 o'clock positions on the steering wheel rim (1).
Verify that the steering wheel temperature is 25°C (77°F) or below.
- If the steering wheel temperature is greater than 25°C (77°F)
  Allow the steering wheel to cool before proceeding to next step.
- Go to next step: If the steering wheel temperature is 25°C (77°F) or below
Press and release the steering wheel heater switch. The steering wheel heater indicator should illuminate. Allow the steering wheel to heat for a minimum of 10 min so that the temperature stabilizes.
- If the heater indicator does not illuminate
  Refer to Heated Steering Wheel Indicator Malfunction
- Go to next step: If the heater indicator illuminates
NOTE:
The Infrared Temperature Gun should be within 50.8mm (2 in) and parallel to the steering wheel rim when taking temperature readings.

Measure the temperature readings at the 3 and 9 o'clock positions on the steering wheel rim (1).
Verify that the steering wheel temperature is greater than 28°C (82.4°F) within 20 min.
- If after 20 minutes the measured temperature is less than 28°C (82.4°F)
  Refer to Circuit System Testing.
- Go to next step: If after 20 minutes the measured temperature is 28°C (82.4°F) or greater
All OK.