Navigating the intricacies of vehicle diagnostics, especially for classic Chrysler, Dodge, and Jeep models, often requires specialized tools. For enthusiasts and DIY mechanics working with older vehicles employing Chrysler’s proprietary CCD-bus (Chrysler Collision Detection bus) and SCI-bus (Serial Communication Interface) systems, a dedicated diagnostic scanner is invaluable. This article introduces a DIY OBDII scanner specifically designed for Chrysler CCD, offering a cost-effective and versatile solution for accessing your vehicle’s data.
This tool bridges the gap between modern OBDII standards and the older Chrysler communication protocols. While directly compatible with OBD2 connectors, it also seamlessly adapts to OBD1 vehicles with the use of adapter cables, ensuring broad compatibility across a range of classic Chrysler models. At the heart of this scanner lies a custom Arduino Mega board, expertly engineered with circuits to interface directly with both CCD-bus and SCI-bus systems. Its Arduino IDE compatibility via FTDI simplifies programming and customization, making it a truly open and adaptable diagnostic tool.
Key Features of the DIY OBDII Scanner
This DIY OBDII scanner is packed with features to empower your diagnostic endeavors:
- Comprehensive Bus Support: Effortlessly send and receive messages across both CCD-bus and SCI-bus networks. The scanner supports both “SCI-A” and “SCI-B” configurations, maximizing vehicle compatibility.
- Integrated Data Logger: Capture and analyze vehicle communication data for in-depth diagnostics and troubleshooting.
- Battery Voltage Measurement: Directly monitor your vehicle’s battery voltage through the OBD-16 pin connector, providing essential system health information.
- I2C LCD Connectivity: Enhance usability with optional I2C LCD connectivity (LCD unit sold separately) for real-time data display.
- Flexible Programming: Program and customize the scanner using the widely accessible Arduino IDE via USB or FTDI connections.
- Reliable Operation: Features auto-reset functionality in case of microcontroller unresponsiveness and an external reset button for manual control.
- Visual Feedback: Four LED indicator lights provide immediate status updates: red for data received, orange for data transmitted, green for power, and blue for general activity.
Hardware and Software Details
The DIY OBDII scanner package includes:
- Diagnostic Scanner Unit: The core hardware based on a custom Arduino Mega board.
- Peripheral Extension Cable: For expanded connectivity options.
Software and essential resources are readily available:
- GUI for Windows: A compiled Graphical User Interface compatible with Windows 7 and later operating systems, downloadable as ChryslerScanner_GUI.zip.
- Source Code: Full source code available on GitHub for customization and development.
- USB Driver (CP210X): Choose the appropriate driver for your Windows OS: Windows 7/8/8.1 or Windows 10.
- DRB DB Reader: Downloadable here.
- Community Forum: Engage with other users and enthusiasts at boards.net.
- Blog: Explore further insights and updates on the WordPress blog.
Vehicle Coverage and Optional Accessories
This OBDII scanner offers vehicle coverage for models manufactured between 1983 and 2003.
Expand your scanner’s capabilities with optional accessories:
- OBD1 Body Cable (CCD-bus, 4-pin): Similar to CHRY-C connector type.
- OBD1 Body Cable (CCD/SCI-bus, 6-pin): Similar to CHRY-C connector type, ensure SCI-bus RX-pin has 5V voltage at ignition.
- OBD1 Engine Cable (SCI-bus, 5-pin): Similar to CHRY-6 connector type.
- I2C LCD Units: Choose between Yellow/Black or Blue/White I2C LCD displays.
Wiring Color Codes for Connections
For DIY connections and expansions, refer to these wiring color codes:
I2C (20 cm / 0.65 ft)
- Black: GND
- Red: +5V
- Yellow or White: SDA
- Blue or Green: SCL
+5V (5 cm / 0.16 ft)
- Black: GND
- Red: +5V
FTDI (5 cm / 0.16 ft)
- Green: DTR
- Yellow: RX (FTDI) / TX (scanner)
- White: TX (FTDI) / RX (scanner)
- Red: +5V
- Blue: CTS
- Black: GND
Conclusion: Your Gateway to Chrysler CCD Diagnostics
The DIY OBDII Scanner for Chrysler CCD bus systems provides a powerful and adaptable tool for diagnosing a wide range of older Chrysler, Dodge, and Jeep vehicles. Its open-source nature, combined with comprehensive features and vehicle compatibility, makes it an excellent choice for automotive enthusiasts and professionals alike seeking to delve into Chrysler CCD diagnostics. Explore the provided resources and empower yourself with the ability to understand and maintain your classic Chrysler vehicle.
