English
JapaneseIMPACT STORIES
Diagnostics Chatbot (DTC)
A GenAI-powered technical diagnostic assistant for FUSO workshop and operational teams.
Company Name
FUSO
Industry
Automobile
Impact
AI-Driven Diagnostics with Faster Turnaround
Application
Chatbot
Background
Mitsubishi Fuso Truck and Bus Corporation (MFTBC) operates in a highly demanding automotive service environment, where diagnostic accuracy and turnaround time directly impact service quality and customer satisfaction. Technicians work across diverse vehicle platforms - including Canter, E-Canter (EV), and Super Great - requiring them to interpret extensive technical documentation covering electrical systems, mechanical components, and electronic control units. This information is primarily maintained in Japanese and distributed across large, static manuals. apply As vehicle systems evolved and became more complex, the effort required to locate, interpret, and knowledge this increased significantly. Cubastion, through its ongoing collaboration with MFTBC on enterprise platforms and AI initiatives, identified the need for a system that could bridge the gap between static documentation real-time and requirements.
Challenges Faced
Manual Diagnostic Effort
Time-consuming diagnostic processes due to manual navigation of technical manuals
High Technician Dependency
High dependency on senior technicians for complex issue resolution
Inconsistent Diagnostic Quality
Inconsistent diagnostic quality across workshops and regions
Complex Documentation Interpretation
Difficulty in interpreting multilingual technical documentation
Limited Symptom-Based Diagnosis
Limited ability to handle symptom-based diagnostics without explicit error codes
Unstructured Data Volume
Large volumes of structured and unstructured technical documents
Low Searchability of Content
Diagram-heavy content with minimal searchable text
Multilingual Processing Requirement
Need for accurate multilingual interpretation (Japanese ↔ English)
Real-Time Response Requirement
Requirement for real-time, context-aware response generation
Explainability & Usability Needs
Ensuring explainable and actionable outputs suitable for workshop use
Solutions
Cubastion developed the Diagnostics Chatbot (DTC), a GenAI-powered assistant that helps technicians access and apply technical knowledge using natural language or diagnostic codes, delivering structured and actionable insights.
Intelligent Diagnostic Query
1. Handling Supports both DTC-based queries
and symptom-based descriptions
2. Interprets user intent across mechanical,
electrical, and electronic domains
3. Eliminates dependency on exact code or
keyword matching
Action-Oriented Diagnostic Guidance
1.Provides root-cause explanations and
troubleshooting steps
2. Recommends corrective and preventive
actions
3. Aligns responses with real workshop
workflows
Visual and Diagram-Aware Assistance
1. Surfaces relevant wiring diagrams and circuit
visuals
2. Links textual explanations with physical
system understanding
3. Enhances clarity for complex diagnostic
scenarios
Multilingual Diagnostic Interaction
1. Supports queries in both Japanese and
English
2. Preserves technical accuracy across
languages
3. Removes language barriers in global
workshop environments
Workshop-Ready Interaction Model
1. Supports voice input and read-aloud
responses
2. Enables quick copy and feedback actions
3. Maintains chat history for continuity in
troubleshooting
Conversational and Context-Aware Experience
1. Allows natural language interaction and
follow-up queries
2. Maintains context across conversations
3. Adapts responses based on user input and
query progression
