WARNING: This page is about a different car, the 2004 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Diagnostic Chart - Sensor Heater Circuit High (1 Of 3)
Courtesy of DAIMLERCHRYSLER CORP.
Fig 2: Diagnostic Chart - Sensor Heater Circuit High (2 Of 3)
Courtesy of DAIMLERCHRYSLER CORP.
Fig 3: Diagnostic Chart - Sensor Heater Circuit High (3 Of 3)