Diesel Repair Desktop is an offline reference for heavy-duty and medium-duty vehicles. It aggregates fault codes (DTCs), wiring diagrams, labor times, VIN decoding and guided troubleshooting into a single Windows application, so you can look up fixes even when you’re away from the internet.



Highlights

• Multi-make coverage: browse by manufacturer, model and year.
• Built-in DTC explorer with PID/SPN/FMI mapping and plain-English descriptions.
• VIN Decoder tab for quick vehicle build details.
• Sections for Wiring Diagrams, Technical Repair Docs, Equipment Fault Codes, Symptom-Based Troubleshooting, Truck Labor Times and Testing Procedures.
• Fast, searchable UI designed for shop or field use.

What you’ll see inside

• Main menu with manufacturer list (e.g., Allison, CAT, Cummins, Detroit, Dodge/Sprinter, Eaton, Ford, Freightliner, Mercedes-Benz, PACCAR, Volvo, WABCO and more).
• Fault Code grid with columns: Fault Code, PID, SPN, FMI, Description.
• VIN Decoder panel with decoded truck/engine/chassis information.
• Context help and update prompts (can be used offline).

Package contents

• Diesel Repair Desktop application (2023 data snapshot; app “About” shows v2.9.98 in the screenshots).
• Offline data set for manufacturers, codes, wiring and procedures.
• First-run registration dialog (enter shop info to continue).

Basic usage

• Install the application and launch it.
• Pick Manufacturer → select Model/Year.
• Open the Fault Codes tab to view DTCs with PID/SPN/FMI mapping.
• Use VIN Decoder to obtain build details for a vehicle.
• Open modules on the left (Wiring Diagrams, Technical Docs, Equipment Fault Codes, Symptom-Based Troubleshooting, Truck Labor Times, Testing Procedures) for repair guidance.

Compatibility notes
Coverage varies by brand/model/year. Some modules (e.g., certain wiring sets or labor guides) may not be available for every selection.

Operating systems
Windows 7, 8, 10, 11 (x64 recommended).

Minimum system requirements

• CPU: Dual-core 2.0 GHz or better
• RAM: 4 GB or more
• Storage: 5–10 GB free for program + data
• Display: 1366×768 or higher
• Network: Optional (for online updates/help)

Disclaimer
This post describes a diagnostic reference tool. Provide your own license/credentials where required. All trademarks belong to their respective owners.

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