This standard specifies systematic testing methods for evaluating the performance of passenger vehicles in low-temperature environments, covering terminology definitions, testing conditions, and specific operations. It is applicable to various types of passenger vehicles. The standard references foundational specifications such as vehicle starting performance and general rules for road tests. Its testing content typically includes key items such as low-temperature cold starting, driving performance, and defrosting with heating systems. These tests must be conducted in specialized low-temperature environmental chambers or natural cold-region testing grounds, utilizing conventional equipment such as thermometers, timers, and engine diagnostic tools to record and assess the vehicle's performance.