PACCAR Davie4 Diagnostic Software is a Windows-based, OEM-level diagnostic and programming tool used by dealerships and large fleets for servicing PACCAR engines, including MX-11 and MX-13 models in Peterbilt, Kenworth, and DAF trucks. The software provides full dealer-level access to all engine and vehicle control modules, supporting advanced diagnostics, parameter changes, and module programming. Key functions include reading and clearing fault codes, performing DPF (Diesel Particulate Filter) regeneration, injector and cylinder tests, enabling or disabling derate conditions, and reprogramming ECUs with the latest calibrations. Davie4 also allows users to download and analyze log files, print and reset trip data, and access thousands of specialized commands. The software requires an active internet connection for calibration downloads and online programming, and is compatible with industry-standard diagnostic adapters such as Nexiq USB-Link. Annual licensing is required, and the software is intended for professional technicians, dealerships, and fleet maintenance operations seeking full control over PACCAR engine diagnostics and service.

Key Features

Dealer-Level Diagnostics and Programming Provides comprehensive access to all PACCAR engine and vehicle modules.

• Read and clear all fault codes
• Perform DPF regeneration and aftertreatment tests
• Injector and cylinder cutout tests

Parameter Changes and ECU Programming Supports advanced configuration and updates.

• Reflash ECU with new calibrations (online access)
• Adjust vehicle parameters (e.g., max speed, idle timers)
• Enable/disable derate and shutdown conditions

Comprehensive Data Management Facilitates in-depth analysis and reporting.

• Download log files in PDF or Excel format
• Print and reset trip data
• Access and manage snapshot and trip reports

Wide Compatibility and Support Designed for use with major PACCAR brands and diagnostic adapters.

• Supports Peterbilt, Kenworth, and DAF trucks
• Compatible with Nexiq USB-Link and other RP1210 adapters
• Online support and remote installation available

Benefits

Maximizes Uptime and Service Efficiency Enables rapid, accurate diagnostics and repairs.

• Dealer-level access reduces downtime
• Streamlines troubleshooting and maintenance

Ensures Compliance and Performance Keeps vehicles up-to-date and operating optimally.

• Access to latest calibrations and software updates
• Supports regulatory compliance for emissions systems

Empowers Professional Technicians and Fleets Provides tools needed for advanced service operations.

• Suitable for dealerships, large fleets, and independent service providers
• Reduces reliance on external service centers