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SAE J1939-73 Diagnostic Layer
J1939/73 specifies the diagnostic layer for a J1939 network and is the only application layer published and supported for J1939. This specification is responsible for defining all diagnostic layer SPNs and PGNs. J1939-73 defines messages for active faults, passive faults, and clearing faults. Also messages for OBD-2 compliance and flash bootloader operation (i.e. erase and programing of flash).
PGN 65226 Active Diagnostic Codes
| Transmission Repetition: | See J1939-73 spec |
| Data Length: | Variable |
| Default Priority: | 6 |
| Parameter Group Number: | 65226 |
| Start Position | Length | Parameter Name | SPN |
| 1.8-1.7 | 2 bits | Malfunction Indicator Lamp Status | 1213 |
| 1.6-1.5 | 2 bits | Red Stop Lamp Status | 623 |
| 1.4-1.3 | 2 bits | Amber Warning Lamp Status | 624 |
| 1.2-1.1 | 2 bits | Protect Lamp Status | 987 |
| 3-6 | 4 bytes | DTC | n/a |
Quick Links
J1939 Protocol Stack
J1939 Bootloader
J1939 Diagnostic Event Manager
J1939 Simulator
J1939 Adapters
J1939 to USB Adapter
J1939 to RS-232 Adapter
J1939 Adapter FAQ
J1939 Software FAQ
J1939-0 Parent Document
SAE J1939-11 Physical Layer, 250 Kbps
SAE J1939-14 Physical Layer, 500 Kbps
SAE J1939-15 Reduced Physical Layer, 250 Kbps
SAE J1939-21 Data Link Layer
SAE J1939-71 Vehicle Application Layer
SAE J1939-81 Network Management
SAE J1939-82 Compliance – Truck and Bus
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