Understanding the Hino Obd2 Pinout is crucial when working with diagnostic tools and adapters for Hino trucks, especially when bridging the gap between OBD2 and J1939 protocols. This guide will clarify the Hino OBD2 connector pin assignments and how they relate to J1939 adapters, ensuring you choose the correct connection for your diagnostic needs.
Decoding the Hino OBD2 Connector: Pinout Explained
Hino trucks, like many modern vehicles, utilize an OBD2 style connector for diagnostics. However, heavy-duty vehicles like Hinos often communicate using the J1939 protocol. Adapters are necessary to translate between these systems. It’s important to note that there are different wiring configurations depending on the age of your Hino truck. Specifically, there are distinctions between older and newer models in how the OBD2 connector is wired for J1939 communication.
To ensure compatibility, let’s examine the pinout configurations for both old and new style Hino OBD2 to J1939 adapters. The table below outlines the wiring connections for each type:
| 16-pin | 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 | – |
| 16 | – | – | Ground | A |
Hino OBD2 to J1939 adapter showcasing the OBD2 style male connector.
This table highlights the key differences in wiring between the “Old” and “New” style Hino OBD2 connectors when adapting to J1939. Notably, the J1939+ and J1939- data lines are on different pins depending on the wiring style. For “Old Style” Hino trucks, J1939+ is on pin 11 and J1939- is on pin 3. In “New Style” configurations, J1939+ moves to pin 2, while J1939- remains on pin 3. Ground and power connections are also reassigned in the “New Style” setup.
Why is the Hino OBD2 Pinout Important for J1939 Adapters?
The correct Hino OBD2 pinout is critical for ensuring proper communication between your diagnostic tool and the truck’s systems. J1939 is a high-speed Controller Area Network (CAN) standard widely used in commercial vehicles for communication and diagnostics. Adapters bridge the physical connector difference and, crucially, the electrical signal mapping.
Using the wrong adapter or misunderstanding the Hino OBD2 pinout can lead to several issues:
- No Communication: If the pins are not correctly aligned with the J1939 protocol, your diagnostic tool will fail to establish a connection with the vehicle’s ECU (Engine Control Unit) and other modules.
- Data Corruption: Incorrect pin assignments can result in scrambled or misinterpreted data, leading to inaccurate diagnostic readings and potentially incorrect repairs.
- Equipment Damage: In some scenarios, improper wiring could potentially damage your diagnostic tool or the vehicle’s electronic systems.
Therefore, carefully identifying whether you need an “Old Style” or “New Style” Hino OBD2 to J1939 adapter based on your truck’s model year and connector type is essential.
Selecting the Right Hino OBD2 to J1939 Adapter
Choosing the correct adapter starts with identifying your Hino truck’s model year. Generally, “New Style” adapters are designed for Hino trucks manufactured around 2014 and later, while “Old Style” adapters are for models prior to this timeframe. However, it’s always best to visually inspect your truck’s OBD2 connector and, if possible, consult your vehicle’s documentation to confirm the correct pinout configuration.
For your convenience, here are the part numbers for both adapter types:
- Hino Truck Old Style (OBD2 Style Male) to J1939 (Male) Adapter: Part No: hino1939
- Hino Truck New Style (OBD2 Style Male) to J1939 (Male) Adapter: Part No: hino1939New
Close-up view of the Hino OBD2 to J1939 adapter connectors.
Both adapters are designed to connect a J1939 tester, equipped with a standard 9-pin Deutsch connector, to the Hino OBD2 port. They ensure the correct translation of signals based on the respective Hino OBD2 pinout configurations.
In conclusion, understanding the Hino OBD2 pinout and the distinction between “Old Style” and “New Style” configurations is paramount when selecting the appropriate J1939 adapter for your Hino truck. By ensuring you have the correct adapter, you’ll enable seamless and accurate diagnostics, saving time and preventing potential issues.
