by Serial Data Pro · Big Dog Diagnostics
Every protocol on the bus — decoded & explained by AI.
A proprietary vehicle-diagnostic pass-through with an AI brain. Custom hardware clips onto the DLC and captures classic CAN and CAN-FD off the raw differential bus, then decodes every standard service on top — OBD-II Modes 01–0A, UDS (ISO 14229), J1939 — down to DTCs, live PIDs, monitor results, VIN, and module memory. Then an onboard AI reads the raw bytes for you and answers in plain English. Owned end to end — silicon, firmware, protocol stack, and the intelligence that runs it.
The honest answer is all of them — every service that rides the CAN bus, plus the raw memory underneath it.
Most scan tools speak a fixed slice of one standard through someone else's pass-thru. This captures the raw bus itself — protocol-agnostic at the frame level — then decodes each standard service on top: OBD-II, UDS, J1939. If the vehicle sends it, the bus carries it, and the AI reads it. There's no "unsupported protocol" list, because it isn't decoding through a vendor's fixed menu — it's reading the wire.
OmniPass reads the differential pair itself — CAN-High and CAN-Low, mirror signals whose ~2 V split is every bit on the bus. A live dominant / recessive capture:
Owned at every layer — the silicon, the firmware, the transport, the server, and the AI that reads it. No licensed pipe, no vendor lock.
Clips onto the vehicle connector, powered from the port. Reads CAN & CAN-FD off the differential pair in real time.
Dual controllers cover classic CAN and CAN-FD. Timestamped, geo-tagged, buffered to onboard EEPROM.
Frames stream into a private ingest, held live and replayable. Where raw bytes meet the decoders.
Raw frames become plain English — what each ID is, what each service means, what a code is telling you and where to look. The intelligence that makes the whole bus readable.
Every service on the CAN bus — decoded from real captured frames, never simulated. Plus the bench-level memory most tools can't touch.
Unified Diagnostic Services runs deep — OmniPass reads the whole ISO 14229 stack off the bus, not just the common handful. Every service, grouped by function:
Automated Volumetric Efficiency testing — a diagnostic only a handful of tools in the industry perform, built directly into OmniPass.
A guided Volumetric Efficiency test — MAF, RPM, and displacement resolved into one real breathing number.
It measures the engine's actual airflow against what it should move at a given RPM, and surfaces the restrictions that never throw a code: a plugging catalytic converter, a collapsed or restricted exhaust, an intake restriction, or a cam-timing / valve problem. It turns "runs rough, no codes" into a measured percentage a tech can act on — built in and guided, not a calculator on the side. Almost no scan tool automates it.
A pass-thru is a rented, standardized pipe you bolt someone else's software onto. This does the same job — and owns the whole thing.