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Learn about the history, standards and applications of on-board diagnostics (OBD), a vehicle's self-diagnostic and reporting capability. OBD systems provide real-time data and trouble codes to detect and monitor emissions failures and other malfunctions.
OBD-II PIDs are codes used to request data from a vehicle, used as a diagnostic tool. Service 01 (Show current data) provides real-time information on engine and vehicle status, such as fuel trim, coolant temperature, and vehicle speed.
Learn how Toyota assigns model codes to its vehicles based on engine and platform types. Find out the meaning of the letters and numbers in the model codes and see examples of different models.
Unified Diagnostic Services (UDS) is a diagnostic communication protocol for electronic control units (ECUs) in automotive electronics, specified in ISO 14229-1. It allows diagnostic tools to access and control various functions and data of ECUs, such as fault memory, firmware, security, and parameters.
A check engine light or malfunction indicator lamp (MIL) is a tell-tale that a computerized engine-management system indicates a problem with the vehicle. The MIL can have different causes and effects, such as a loose gas cap, worn spark plugs, or a faulty oil valve.
The data link connector (DLC) is the multi-pin diagnostic connection port for automobiles, trucks, and motorcycles used to interface a scan tool with the control modules of a given vehicle and access on-board diagnostics and live data streams. [1] Prior to 1996, many OBD-I data link connector's were in the engine compartment, usually near the ...
ALDL is a proprietary system developed by General Motors for diagnostics and data link of emission control systems. It uses different connectors and data rates, and requires specific definitions of vehicle parameters and functions.
ICD-10-CM is a set of diagnosis codes used in the US, based on the ICD-10 with some adaptations. It replaced ICD-9-CM in 2015 and is updated annually by the National Center for Health Statistics.