Qualcomm OBDII J1708 User Manual download pdf (Page 10)

SI-VEU 3.0

Vehicle Enterprise Unit

Page 10 of 11

The mating connector is Molex Mini-Fit, Jr.™ P/N: 39 - 01 – 2040/2045 and crimp P/N:

44485 – 1211 with 18AWG wire.

4. Display Unit Interface

This stacked DB15 connector is reserved for interfacing the SI-VEU3.0 to our display

unit, the SI-DU1.0

5. OBDII Vehicle Interface

The SI-VEU3.0 has a 9-pin female D-Sub connector to interface to the On-Board

Diagnostics Phase-2 (OBDII) port on the vehicle. The pin descriptions are given in Table

2. The OBDII vehicle interface on the SI-VEU3.0 includes all OBDII protocols:

• J1850 PWM, the 41.6 kHz protocol commonly used in Ford Motor Company

vehicles.

• J1850 VPW, the 10.4 kHz protocol commonly used in General Motors and some

Daimler-Chrysler vehicles

• ISO 9141 and ISO 14230 (KWP2000), which are protocols that are commonly used

in imported vehicles such as Volkswagen.

• J1939 CAN Bus interface

Pin# on DB9 Pin# on J1962 OBD Description

1 5 Signal GND

2 4 Chassis GND

3 6 High Speed CAN H

4 7 ISO 9141-2K

5 9 High Speed CAN L

6 10 J1850 -

7 2 J1850 +

8 15 ISO 9141-2 L

9 16 Battery Positive

Table 7. Pin Descriptions of the female DB9 and J1962 OBD pins for OBDII interface

6. COM A

This is the first of the two COM ports we have available on the SI-VEU3.0. Full flow

control is achieved on this port through a male DB9 connector. This acts as the DTE side

of the RS-232 communication channel. Windows CE designates this port as COM 4.

1 2 ... 5 6 7 8 9 10 11

No comments

Qualcomm OBDII J1708 User Manual Page 10