The OBDII (On-Board Diagnostics II) port is a standardized 16-pin connector found in most vehicles manufactured after 1996. This port allows external devices, such as code readers and diagnostic tools, to access the vehicle’s computer system and retrieve information about its performance. While the question of the plug’s size might seem straightforward, understanding its dimensions can be helpful when choosing compatible diagnostic equipment. This article clarifies the size and other relevant information regarding the OBDII plug.
The OBDII connector itself uses a standardized J1962 connector. This connector is a trapezoidal shape with two beveled corners, ensuring it can only be plugged in one way. The connector housing measures approximately 1.5 inches (3.8 cm) wide and 1 inch (2.5 cm) tall. While there might be slight variations in the outer housing dimensions depending on the manufacturer, the critical dimensions of the pin arrangement and spacing remain consistent to ensure compatibility across all OBDII compliant vehicles.
It’s important to differentiate between the size of the connector housing and the actual plug that interfaces with the vehicle’s OBDII port. The male plug on diagnostic tools is designed to fit snugly into the female port on the vehicle. The pins on the plug are arranged in two rows of eight, following a specific configuration defined by the SAE J1962 standard. Each pin is assigned a specific function, such as power, ground, and communication lines for various vehicle systems.
Understanding the size of the OBDII plug goes beyond just its physical dimensions. While the connector is standardized, the location of the port can vary significantly between vehicle makes and models. It’s often found under the dashboard on the driver’s side, but can also be located in the center console, glove compartment, or even near the steering column. Consulting the vehicle’s owner’s manual is always recommended to locate the OBDII port accurately.
Finally, remember that while physically disconnecting the OBDII plug (and disabling related apps) may stop data collection for programs like Drivewise, it also halts the accumulation of potential savings associated with safe driving habits. This data, while potentially revealing driving habits, can also be beneficial in exonerating drivers in accident investigations. Weighing the pros and cons of data collection is a personal decision each driver must make.
