System Overview
Upon detection of a system fault, the VF display on the climate control assembly will flash one time per second for 100 seconds. If a fault occurs in the outside air temperature circuit the VF display will not flash. However, the outside temperature will be absent from the display.
Begin all diagnosis with the "Dual Zone Air Conditioning System Check". The system check leads to a specific chart or test. Finish all diagnosis by repeating "Air Conditioning System Check" to ensure correct diagnosis.