User Manual

NexLink NL102 User Manual
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1. INTRODUCTION
The NL102 is specially developed for car, mini van, SUV, light duty and heavy
duty vehicles, which supports all 10 modes of OBDII test (EVAP, O2 Sensor,
I/M Readiness, MIL Status, VIN Info, and On-board monitors testing etc.) for a
complete diagnosis and enables users to read DTCs, clear DTCs and view the
datastream with a live color graphing. It covers a wide range of vehicles since it
offers multiple data bus protocols, such as J1587 , J1708 and J1939. It can be
connected to PC through the USB cable for upgrade to keep updated with the
latest software version.
Notice: NL102 may automatically reset while being disturbed by strong static
electricity. THIS IS A NORMAL REACTION.
2. General Information
2.1 On-Board Diagnostics (OBD) II
The first generation of On-Board Diagnostics (called OBD I) was developed by
the California Air Resources Board (ARB) and implemented in 1988 to monitor
some of the emission control components on vehicles. As technology evolved
and the desire to improve the On-Board Diagnostic system increased, a new
generation of On-Board Diagnostic system was developed. This second
generation of On-Board Diagnostic regulations is called “OBD II”.
The OBD II system is designed to monitor emission control systems and key
engine components by performing either continuous or periodic tests of specific
components and vehicle conditions. When a problem is detected, the OBD II
system turns on a warning lamp (MIL) on the vehicle instrument panel to alert
the driver typically by the phrase of “Check Engine” or “Service Engine Soon”.
The system will also store important information about the detected malfunction
so that a technician can accurately find and fix the problem. Here below follow
three pieces of such valuable information:
1) Whether the Malfunction Indicator Light (MIL) is commanded ‘on’ or ‘off’;
2) Which, if any, Diagnostic Trouble Codes (DTCs) are stored;
3) Readiness Monitor status.