The SAE J915-2017 standard provides a foundational framework for the manual control sequence of automatic transmissions in passenger cars and light-duty trucks. This recommended practice, stabilized in 2017, outlines the shift pattern (PRNDL), gate designs, and critical safety interlocks needed…

Overview of SAE J195 SAE J195 is an international standard that originally addressed the design and performance requirements for automatic speed control systems in motor vehicles. First issued in 1970, it provided guidelines for system engagement, disengagement, and safety measures.…

SAE J1292 (APR2016) is a recommended practice that establishes guidelines for the application of primary wiring distribution system harnesses in automotive and motor coach vehicles. Though now stabilized, it remains a valuable reference for new vehicle builds, rewiring, and service.…

In the design and specification of automatic belt tensioners for automotive accessory drive systems, precise and consistent terminology is crucial. SAE J2198 (R) Glossary – Automatic Belt Tensioner provides the industry standard for naming and defining components, types, configurations, and…

Understanding SAE J311-2024 SAE J311-2024 is an SAE Information Report that consolidates the essential properties and performance characteristics desired by manufacturers of automatic transmissions for passenger cars and light-duty trucks. First issued in 1952 and revised periodically, the standard provides…

Rethinking Safety for ADS Testing The rapid development of automated driving systems (ADS) has introduced testing requirements far beyond those of conventional vehicles. Traditional proving ground safety practices, while well-established, do not fully address the additional hazards and complexities of…

The SAE J3105/1-2023 standard defines the requirements for infrastructure-mounted pantograph (cross-rail) conductive automated connection devices (ACDs) used to charge heavy-duty electric vehicles such as buses and coaches. This recommended practice enables hands-free, vertically engaged charging at power levels up to…

The SAE J1939-16 standard defines a process for automatically detecting the baud rate of CAN Classic networks, enabling devices to join without disrupting existing communication. This guide breaks down the key concepts, including ECU classifications, discovery modes, and implementation tips…

Contamination built into hydraulic components is a leading cause of catastrophic start-up failures. SAE J1227-2024 provides standardized laboratory methods to determine contamination levels in wetted portions of components, subsystems, and systems. This article explores key aspects of the recommended practice,…

SAE J4000 is a tool to identify and measure best practice in the implementation of lean operation in a manufacturing organization. It provides a structured assessment across six key elements, each scored from 0 to 3, to help organizations gauge…

When evaluating training for automotive service technicians, it’s easy to focus on what’s measurable: hours of instruction, number of attendees, or participant satisfaction. But the SAE J2018 Recommended Practice challenges this approach. The real measure of training effectiveness lies in…

The SAE J2450/1 supplemental training document, stabilized in October 2019, serves as a companion to the SAE J2450 Translation Quality Metric. While J2450 provides the detailed rules and instructions for scoring translations, J2450/1 focuses on practical application—equipping both clients and…

Data is the lifeblood of artificial intelligence systems in ground vehicles, enabling advanced driver assistance and automated driving functions. As outlined in the recently published SAE J3298_202407 information report, understanding the types, sources, challenges, and governance of this data is…

The latest SAE Technical Information Report, J3312 (2025), outlines the key applications and use cases of artificial intelligence in ground vehicles and transportation infrastructure. This report categorizes AI applications that improve safety, security, and efficiency across various vehicle operations, from…

The SAE J3187‑1:2023 standard provides a comprehensive appendix on using System Theoretic Process Analysis (STPA) specifically for human‑machine interaction (HMI) evaluations. It addresses a critical gap: modelling the human operator as a controller with all their cognitive complexities. This article…

As safety-critical systems become more complex, traditional hazard analysis methods often fall short in addressing risks arising from system interactions and intended functionality limitations. The SAE J3187-2 standard provides recommended practices for applying System Theoretic Process Analysis (STPA) to Safety…

Accident reconstruction professionals often turn to the critical speed formula to estimate vehicle speed from yaw marks. SAE J2969-2024, reaffirmed in 2024, defines the recommended practice for this method, emphasizing consistent data collection, accurate measurement, and thorough analysis to minimize…