scope:

Introduction

Note: Nothing in this standard supercedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose. Multiple ambient condition validation of the objective performance capability of a vehicle's Heating, Ventilation and Air Conditioning (HVAC) system in city traffic start and stop conditions, by reproducible measurements in a climatic wind tunnel (CWT). In addition to low speed HVAC performance under a variety of ambient conditions; the frequency of stabilized engine off idle (for vehicles with engine off idle) is measured. The test data is used to evaluate customer comfort and compressor logic for both conventional idle and engine off idle vehicles. This enables the evaluation of city traffic Air Conditioning (AC) and compressor control (regarding the risk of ice formation). The protocol can optionally be used for subjective data.

Applicability. GM passenger vehicles with an HVAC System. See 3.3.3 for Solar Sensor limitations.

Remarks. None.