Getting Started

Introduction to On-Board Diagnostics

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OBD I

The original on-board diagnostics (OBD I) lacked consistency in communication and interface while allowing different interpretations among vehicle manufacturers. Ford and Chrysler used different types of engine control computers and data link connectors ( DLCs), and GM varied the trouble codes and communication protocols from year-to-year.

OBD II

On-board diagnostics version II (OBD II) is a system that the Society of Automotive Engineers (SAE) developed to standardize automotive electronic diagnosis.

Beginning in 1996, most new vehicles sold in the United States were fully OBD II compliant.

Technicians can now use the same tool to test any OBD II compliant vehicle without special adapters. SAE established guidelines that provide:

A universal connector, called the DLC, with dedicated pin assignments.

A standard location for the DLC, visible under the dash on driver’s side.

A standard list of diagnostic trouble codes (DTCs) used by all manufacturers.

A standard list of parameter identification (PID) data used by all manufacturers.

Ability for vehicle systems to record operating conditions when a fault occurs.

Expanded diagnostic capabilities that records a code whenever a condition occurs that affects vehicle emissions.

Ability to clear stored codes from the vehicle’s memory with a Scan Tool.

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Actron CP9185 manual Introduction to On-Board Diagnostics, Obd

CP9185 specifications

The Actron CP9185 is a highly regarded automotive diagnostic scanner that is designed for both professional mechanics and DIY enthusiasts. This versatile tool brings a plethora of features and advanced technologies, making it essential for anyone looking to diagnose and repair vehicle issues efficiently.

One of the standout features of the Actron CP9185 is its ability to read and clear diagnostic trouble codes (DTCs) from various vehicles. This functionality allows users to quickly identify issues in a wide range of automotive systems, including the engine, transmission, and ABS. The scanner supports OBD II protocols, making it compatible with most vehicles manufactured after 1996, which significantly expands its usability across different makes and models.

The CP9185 comes equipped with an easy-to-read LCD display that showcases real-time data. Notably, this display features live data streaming, allowing users to monitor various parameters such as RPM, coolant temperature, and vehicle speed on-the-fly. This capability aids in pinpointing potential problems that may not be immediately evident from trouble codes alone.

Another important characteristic of the Actron CP9185 is its user-friendly interface. The device includes a built-in help menu and an intuitive navigation system, which simplifies the diagnostic process for users of all skill levels. The rugged design and ergonomic grip ensure durability, making it suitable for frequent use in workshop environments.

In terms of connectivity, the CP9185 features a USB port that allows users to update the device’s software and database. Regular updates ensure that the scanner is equipped with the latest codes and vehicle information, which enhances its effectiveness in performing diagnostics.

The Actron CP9185 also boasts an extensive library of manufacturer-specific codes, which can be invaluable for accurate diagnostics. This feature allows mechanics to delve deeper into vehicle-specific issues, ensuring more precise repairs.

Overall, the Actron CP9185 stands out as a reliable and efficient automotive diagnostic tool that combines essential features with advanced technology. Its comprehensive code-reading capabilities, real-time data display, and user-friendly design make it an indispensable instrument for anyone involved in automotive maintenance and repair. Whether you're a professional technician or a weekend warrior, the CP9185 can significantly enhance your diagnostic capabilities, making it a worthy investment for vehicle care.