Circuit/System Verification
WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, Engine OFF, observe the Ambient Air Temperature Sensor temperature through the Driver Information Center (DIC). The reading should be the ambient temperature setting. If the display of the DIC for temperature reads dashes, check for a sensor signal circuit fault.