Tire Pressure and Temperature Monitoring Systems for Trailers under 26,000 lbs. GVWR J3309

This SAE recommended practice defines the system and component functions, measurement metrics, testing methodologies for evaluating the functionality and performance of tire pressure systems for use on trailers under 26,000lbs. GVWR within the known operating environments. This document is applicable to all towed trailers under 26,000lbs. GVWR. Examples of towed trailers are recreational vehicle travel trailers and fifth wheels, utility trailers, cargo trailers, livestock trailers, flatbed trailers, boat trailers, and snowmobile trailers. These trailers can be equipped with 1,2 or 3 axles with each axle supporting either 2 or 4 tires. These systems are recommended to address all tires in service as originally installed on a trailer by the OEM. This Recommended Practice can also be applied to external TPMS that also cover tow vehicles and trailers simultaneously. This document will focus on tire pressure systems of the monitoring type.