Humzor NEXZSYS NS706, User Manual, Page: 19 / 50

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6 Diagnostics
The Diagnostics application can access the electronic control module of multiple vehicle control systems,
including but not limited to the engine, transmission, antilock brake system (ABS) and airbag system (SRS).
6.1 Establish Vehicle Communication
The diagnostics operations require connecting the PC to the test vehicle through the VCCI device using
the Main Cable. (Use the applicable OBDI-type adapter if needed). To establish proper vehicle communication
to the PC, you need to perform the following steps:
1. Connect the VCI device to the vehicle's DLC for both communication and power source.
2. Connect the VCI device to the PC via BT auto-pairing, Wi-Fi or USB connection.
3. When the above steps are completed, check the VCI navigation button at the bottom bar on the screen.
If a blue BT, Wi-Fi or USB icon displays at the upper right corner, the NEXZSYS Diagnostic Platform is ready
to start vehicle diagnosis.
6.2 Protocol Supported
The following protocols are included:
 High Speed CAN - offers baud rates from 40 Kbit/s to 1 Mbit/sec, depending on cable length. This is
the most popular standard for the physical layer, since it allows for simple cable connection between devices.
High speed CAN networks are terminated with 120 ohm resistors on each end of the network.
 Low Speed CAN - offers baud rates from 40 Kbit/s to 125 Kbits/sec. This standard allows CAN bus
communication to continue in case of a wiring failure on the CAN bus lines. In low speed CAN networks, each
device has its own termination.

Single CAN - offers baud rates up to 33.3 Kbit/s (up to 88.3 Kbit/s for high-speed mode)
 J1939 CAN - is used in the commercial vehicle area for communication throughout the vehicle with the
physical layer defined in ISO 11898. Under J1939/11 and J1939/15, the data rate is specified as 250 Kbit/s, with
J1939/14 specifying 500 Kbit/s.
 J1850 (PWM) - SAE J1850 pulse-width modulation offers baud rates up to 41.6 Kbit/s, standard of the
Ford Motor Company
 J1850 (VPW) - SAE J1850 variable pulse width offers baud rates up to 10.4 Kbit/s, standard of the
General Motors
 J1708 (SAE) - the standard defines a double-wire 18-gauge cable that can run up to 130 feet (40 m)
and operates at 9600 bit/s