SAE J902™ APR2026 is a stabilized SAE Recommended Practice for evaluating passenger vehicle windshield defrosting and demisting systems. It defines minimum performance requirements, test equipment, vehicle preparation, cold-chamber conditions, defrosting and demisting procedures, measurement methods, performance criteria, steam generator specifications, and vehicle test instrumentation.
The document applies to passenger cars, light trucks, multipurpose vehicles with a GVW of 4500 kg (10000 pounds) or less, and M1 category vehicles. It addresses internal combustion engine, hybrid, and electric vehicle configurations and supports uniform, repeatable laboratory testing for system validation and performance comparison.
Application Scope: For automotive manufacturers, suppliers, engineering laboratories, and compliance professionals evaluating windshield defrosting and demisting performance in passenger vehicles.
