Vehicle Diagnosis Service

An intelligent service solution for vehicle status diagnosis and predictive maintenance. Through automatic diagnosis, manual diagnosis, and scheduled diagnosis functions, OEMs can provide proactive vehicle management value to customers.

Business Value for OEMs

🔧 Vehicle Management Innovation

• Predictive Maintenance: Reduce maintenance costs through early detection before failures occur
• Vehicle Lifespan Extension: Optimize vehicle lifespan through continuous status monitoring
• Customer Satisfaction: Improve reliability by minimizing vehicle downtime

💰 New Revenue Models

• Diagnosis Subscription Services: Monthly vehicle health monitoring services
• Predictive Maintenance Reports: Maintenance timing predictions based on driving patterns
• Partnership Expansion: B2B services linked with repair shops and insurance companies

📱 Enhanced Customer Experience

• Real-time Peace of Mind: 24/7 vehicle status monitoring and alerts
• Intelligent Diagnosis: AI-based failure cause analysis and solution recommendations
• Convenient Maintenance: One-stop service for maintenance booking and history management

Sub-modules

• Automatic Diagnosis - Automated vehicle health monitoring and diagnosis reporting
• Manual Diagnosis - Technician-supported diagnosis through live data streaming
• Scheduled Diagnosis - Periodic health monitoring and maintenance scheduling

OpenAPI Spec

Interactive API Explorer

Use Swagger UI for interactive API testing.

OEM Implementation Considerations

🔧 Technical Integration

• Vehicle ECU Integration: Real-time collection of CAN, OBD-II data
• AI Analysis Engine: Machine learning-based failure pattern analysis
• Cloud Processing: Real-time processing and storage of large-scale diagnosis data

📊 Service Operations

• Scalability: Support for simultaneous diagnosis monitoring of multiple vehicles
• Reliability: Guarantee 99.9%+ diagnosis service availability
• Global Support: Support for various vehicle models and diagnosis protocols

🎯 Target Customers

• Primary Target: Individual customers sensitive to vehicle management
• Secondary Target: Vehicle management companies, rental car companies
• B2B Opportunities: Repair shops, insurance companies, vehicle dealerships

Key Features

• Automatic Diagnosis: Continuously monitor vehicle status and predict failures using AI
• Manual Diagnosis: Expert-level precision diagnosis through real-time data streaming
• Scheduled Diagnosis: Periodic health checks and maintenance timing optimization

SSE Endpoints (Event Occurrence)

Endpoint	Description
/api/v1/diagnosis/vehicles/:vin/auto/events	Real-time vehicle diagnosis status updates
/api/v1/diagnosis/vehicles/:vin/manual/live-data	Manual diagnosis real-time data stream
/api/v1/diagnosis/vehicles/:vin/scheduled/notifications	Scheduled diagnosis notifications

Common API Specifications

All Diagnosis APIs follow these common specifications.

Common Headers

Header	Value	Required	Description
Authorization	Bearer {access_token}	Yes	Security token for authentication
Content-Type	application/json	Yes	Request body format
Accept	application/json	No	Response body format

Common Response Codes

Code	Status	Description
200	OK	Request processed successfully
201	Created	Resource created successfully
204	No Content	Success, but no content to return
400	Bad Request	Invalid request parameters or logic
401	Unauthorized	Authentication failed or token expired
403	Forbidden	Insufficient permissions for the resource
404	Not Found	Requested resource does not exist
500	Internal Error	Unexpected server-side error

Error Response Format

{
  "errorCode": "ERR_DIAGNOSIS_FAILED",
  "message": "Vehicle communication failed during diagnosis.",
  "timestamp": "2026-04-02T16:57:00Z"
}

API Endpoints

Refer to the Common API Specifications for headers and error codes.

Automatic Diagnosis Management

Core APIs for AI-based automatic vehicle health monitoring, providing continuous status tracking and failure prediction.

• GET /auto/dtc - Query current diagnostic trouble codes
• DELETE /auto/dtc - Delete diagnostic trouble codes
• GET /auto/status - Query overall vehicle health status
• GET /auto/report/latest - Query latest automatic diagnosis report
• GET /auto/history - Query automatic diagnosis history
• GET /auto/health/trend - Query vehicle health score trends

Manual Diagnosis Management

Provides expert-level precision diagnosis through real-time data streaming.

• POST /manual/session-request - Request manual diagnosis session
• POST /manual/consent - Provide diagnosis consent
• POST /manual/session-stop - Stop manual diagnosis session
• POST /manual/command - Transmit diagnosis command
• GET /manual/session/{sessionId}/report - Query session diagnosis report

Scheduled Diagnosis Management

Provides periodic health checks and maintenance timing optimization.

• GET /scheduled/report/latest - Query latest scheduled diagnosis report
• GET /scheduled/consumables - Query consumable status
• GET /scheduled/statistics - Query maintenance statistics
• POST /scheduled/maintenance/schedule - Create maintenance booking

DTC Management

Provides detailed information and standardized code lists for vehicle diagnostic trouble codes (DTC).

• GET /dtc/{code} - Query specific DTC code detailed information
• GET /dtc/list - Query DTC code list

Service Integration Value

🔄 Data Integration Synergy

• Comprehensive Health Report: Vehicle health report integrating data from three diagnosis functions
• Predictive Maintenance Analysis: Failure prediction and maintenance timing recommendations based on past diagnosis data
• Customized Alerts: Alert system optimized for vehicle status and driving patterns

🚀 Differentiated Competitiveness

• Unique Features: AI-based predictive maintenance solution not offered by competitors
• Scalability: Easy integration with future additional vehicle management functions
• Global Standards: Standardized API supporting various vehicle models and diagnosis protocols

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For complete API details, refer to the OpenAPI specification in Swagger UI.