IQ AVAS
UDS Stack (Server/Client -ISO 14229 14229) Unified Diagnostic
The UDS Stack is a standardized automotive diagnostic communication protocol defined under ISO 14229, enabling seamless interaction between external diagnostic tools and in-vehicle Electronic Control Units (ECUs). Infiquity’s UDS implementation supports both Client (Tester) and Server (ECU) roles, ensuring end-to-end diagnostic capability across vehicle platforms.
Standardized Diagnostic Protocol
UDS provides a globally accepted diagnostic framework that facilitates secure and reliable communication between diagnostic testers and vehicle ECUs. It enables consistent diagnostic behavior across OEMs, Tier-1s, and service tools while supporting modern vehicle architectures.
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1. Smaller Footprint
The UDS stack is optimized for minimal memory and CPU usage, making it suitable for resource-constrained ECUs. This compact design reduces flash and RAM requirements without compromising functionality, enabling deployment even on low-end microcontrollers.
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2. Controller Independence
The stack is hardware-agnostic, allowing it to run on a wide range of ECU controllers and microcontroller families. This abstraction simplifies reuse across multiple ECU variants and vehicle platforms.
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3. Ease of Portability
Designed with modularity in mind, the UDS stack can be easily ported across different ECUs, operating systems, and communication layers (CAN, CAN-FD, FlexRay, Ethernet). This accelerates development and reduces integration effort.
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4. Comprehensive Diagnostic Services
The implementation supports the full suite of UDS services, including:
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Reading and clearing Diagnostic Trouble Codes (DTCs)
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ECU identification and data readout
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Input/output control and actuator testing. Routine control and functional diagnostics
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Secure access and session management
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Technical Advantages
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1. Optimized Performance
The stack is engineered for low latency and high-speed processing, ensuring fast diagnostic response times even under heavy bus load. Efficient state handling and transport-layer interaction improve overall ECU responsiveness.
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2. Scalability Across Vehicle Platforms
The UDS stack is highly scalable, supporting single-ECU implementations as well as complex multi-ECU vehicle networks. It adapts seamlessly to different vehicle segments, from entry-level platforms to premium and connected vehicles.
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OEM-Configurable Flexibility
Highly configurable parameters allow OEMs to tailor:
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Diagnostic sessions and security levels
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Service availability and timing constraints
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Memory access policies and data identifiers
This flexibility ensures compliance with OEM-specific diagnostic strategies and cybersecurity requirements.
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Value to OEMs & Tier-1s Leverage Infiquity's UDS Stack
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Faster ECU development and validation cycles
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Reduced integration and maintenance effort
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Compliance with global diagnostic standards
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Future-ready diagnostics for connected and software-defined vehicles
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