Diagnosis And Testing - Engine Cooling System: Notes
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.
Establish what driving condition caused the cooling system complaint. The problem may be caused by an abnormal load on the system such as the following: prolonged idle, very high ambient temperature, slight tail wind at idle, slow traffic speed, traffic jam, high speed, steep grade.