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.

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Figure 2 - The OBD-II / J1962 Connector Vehicle End View

Table 1 - OBD-II To Db-25 Adapter

*

Discretionary means that the J1962 specification leaves this pin for use by the manufacturer.

Last Update: Tuesday, March 26, 2002

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

neoVI Documentation - (C) Copyright 2000-2001 Intrepid Control Systems, Inc.

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