Qualcomm OBDII J1708 User Manual download pdf (Page 9)

SI-VEU 3.0

Vehicle Enterprise Unit

Page 9 of 11

The mating connector is Molex Mini-Fit, Jr.™ P/N: 39 - 01 – 2120/2125 and crimp P/N:

44485 – 1211 with 18AWG wire.

2. Covert Microphone

A covert microphone is provided as an option with the SI-VEU3.0. This microphone is

activated and the voice transmitted automatically through the GPRS/GPS Modem once

the emergency button is activated. A four-pin connector is available for connecting this

microphone.

The pin-outs are as shown in the table below in Table 4.

Microphone Input 3.3V DC

GND GND

Table 4. Pin-outs on the Covert Microphone Connector as seen from the outside.

The mating connector is Molex Micro-Fit 3.0™ P/N: 43025 – 0400 with crimp P/N:

43030 – 000x using 20-24AWG wire.

3. SAE J1708 and J1939 Interface

The SI-VEU3.0 also includes SAE J1708 and J1939 CAN Bus interface for data

communications between microcomputer systems in heavy-duty vehicle applications.

These lines are accessed through the 2x2 dual row Molex Minifit Jr. connector. The pin

description is given in Table 3. Please note that the J1939 CAN Bus is available both

through this connector as well as through the standard OBDII Connector. The pin-outs

are as shown in the table below in Table5 and Table6.

4 3

1 1

Table 5. Pin-outs on the J1708 and CAN Connector

Pin # Description

1 J1708-

2 High Speed CAN L

3 J1708+

4 High Speed CAN H

Table 6. Pin Descriptions of the Connector for SAEJ1708 and J1939 Bus

1 2 3 4 5 6 7 8 9 10 11

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Qualcomm OBDII J1708 User Manual Page 9