The Hino Obd2 Connector can sometimes be a challenge to find, especially with the variations between different models and years. This guide will provide a detailed overview of the Hino OBD2 connector, its location, and the different adapter options available for diagnostics and data logging.
Understanding the Hino OBD2 Connector and J1939 Protocol
Hino trucks, like many commercial vehicles, utilize the J1939 protocol for communication between the vehicle’s electronic control units (ECUs). While Hino trucks often feature an OBD2-style connector, it’s crucial to understand that this connector doesn’t always function in the same way as a standard OBD2 port found in passenger vehicles. A specific adapter is often required to connect standard J1939 diagnostic equipment to the Hino’s OBD2 connector. These adapters convert the signals between the 9-pin Deutsch connector typically used for J1939 and the 16-pin OBD2 style connector found on the Hino.
Hino OBD2 Connector Location and Adapter Types
The Hino OBD2 connector is usually located under the dashboard, often near the steering column or on the driver’s side kick panel. However, the exact location can vary depending on the specific truck model and year. Consulting the vehicle’s owner’s manual is always recommended.
There are two primary types of Hino OBD2 to J1939 adapters:
- Older Hino Models (Pre-2014): This adapter accommodates the specific wiring configuration of older Hino trucks.
- Newer Hino Models (2014 and Later): This adapter is designed for the updated wiring found in more recent Hino models.
The difference between these adapters lies in the pin assignments within the connector. Using the incorrect adapter can lead to miscommunication or even damage to the diagnostic equipment.
Wiring Configuration for Hino OBD2 Adapters
Understanding the wiring differences between the older and newer Hino OBD2 adapters is crucial for proper diagnostics. The table below outlines the pin assignments for both adapter types:
| 16-Pin OBD2 | Old Signal | Old J1939 | New Signal | New J1939 |
|---|---|---|---|---|
| 1 | 24V Battery | B | 24V Battery | B |
| 2 | ISO-L Line | – | J1939+ | C |
| 3 | J1939- | D | J1939- | D |
| 6 | Autolevel Rx | – | – | – |
| 7 | – | – | ISO-K Line | – |
| 9 | Autolevel Init | – | – | – |
| 10 | ISO-K Line | – | – | – |
| 11 | J1939+ | C | – | – |
| 12 | Signal Ground | A | – | – |
| 13 | Chassis Ground | – | – | – |
| 14 | Autolevel Tx | – | – | – |
| 15 | – | – | Ground | – |
| 15 | – | – | Ground | A |
Choosing the Right Hino OBD2 Adapter
Selecting the correct adapter is essential for successful communication with the vehicle’s systems. Using the wrong adapter could lead to communication errors or potential damage to diagnostic equipment. Referencing the truck’s year and model information is critical in determining the appropriate adapter type.
Conclusion
Locating and connecting to the Hino OBD2 connector requires understanding the nuances of the J1939 protocol and the specific adapter requirements for different Hino truck models. By using the correct adapter and understanding the wiring configurations, technicians and owners can effectively diagnose and troubleshoot issues, ensuring optimal performance and uptime for their Hino trucks. Remember to always consult the vehicle’s documentation for the most accurate information.
