neoNub OBD-II / J1962 to DB25 Connector Pin-out - neoVI
Main
The neoNub OBD-II / J1962 adapter is a connector that converts the neoVI db25 to the OBD2 connector. This connector has many advantages over other connectors:
* Potential to eliminate a
cable - Mounting the neoNub on neoVI allows the cable portion of the OBD 2
cable to be removed. This means you have one less thing to carry.
* DB25 is an "off-the-shelf" standard - You can buy these
connectors at local electronics stores (ie. Radio Shack)
* The connector is fully populated - All 16 OBD signals pass
through to the DB25 side. Most OBD2 solutions only populate part of the cable.
For example, many won't contain both single wire CAN and Keyword 2000.
* The OBD adapter can be left connected to the vehicle eliminating ODB
wear-out - The OBD connector is designed for a few number of connection
cycles. This can lead to OBD wear-out on test vehicles or benches. You can leave
the neoNub on the vehicle and simply disconnect and connect the DB25 portion.
The standard pin-out will meet the OBD2 requirements, the OBD requirements that add CAN, and the GMLAN requirements.
Figure 1 - neoNub OBD2 to DB25 Adapter
WARNING
- Make sure to check your OBD2 connector for any non-standard layouts that may
interfere with the signaling on the neoVI unit.
neoNub OBDII / to neoVI Pin-out
The relationship between the OBD-II connector (figure 1) and the neoNub is listed below in table 1.
Figure 2 - The OBD-II / J1962 Connector Vehicle
End View
Table 1 - OBD-II To Db-25 Adapter
| J1962 Pin | J1962 Pin Description | neoVI Connection | neoVI DB25 Pin |
| 1 | Discretionary* (GMLAN SW CAN Line) | SW CAN | 1 |
| 2 | + line of SAE J1850 | J1850 VPW | 2 |
| 3 | Discretionary* (GMLAN MS CAN H) | MS CAN H | 16 |
| 4 | Chassis Ground | AUX L | 23 |
| 5 | Signal Ground | PWR GND | 13 |
| 6 | Discretionary* (GMLAN HS CAN H) | HS CAN H | 14 |
| 7 | K Line of ISO 9141-2 | ISO K | 8 |
| 8 | Discretionary* | J1708H | 19 |
| 9 | Discretionary* (GM ALDL) | AUX H | 24 |
| 10 | - line of SAE J1850 | J1850 PWM L | 5 |
| 11 | Discretionary* (GMLAN MS CAN L) | MS CAN L | 17 |
| 12 | Discretionary* | LSFT H | 3 |
| 13 | Discretionary* | LSFT L | 4 |
| 14 | Discretionary* (GMLAN HS CAN L) | HS CAN L | 15 |
| 15 | L line of ISO 9141-2 | ISO L | 7 |
| 16 | Un-switched Vehicle Battery Positive | VBATT | 25 |
* Discretionary means that the J1962 specification leaves this pin for use by the manufacturer.
| neoVI Documentation - (C) Copyright 2000-2020 Intrepid Control Systems, Inc. |
Last Update: Wednesday, July 15, 2009