Installation Manual

X-431 Heavy-duty module is specifically designed to diagnose diesel and gas-fueled heavy-duty vehicle
models of 12V & 24V voltage.
1 Knowledge of X-431 HD Module
1.1 Features
1. Applicable to diesel vehicle of 12V & 24V voltage; no need for battery conversion when testing 24V trucks;
2. Supports a wide range of vehicle models covering Asian, American and European etc;
3. Powerful testing function enables you to diagnose all electronic control system;
4. International design to adapt to all diagnostic sockets.
1.2 Ports and Indicators of X-431 HD Module
Fig. 1-1 Ports and indicators of X-431 HD module
No.
Name
Notes
1
Indicators (from left to
right)
Power indicator
It lights up when X-431 HD module is
powered up.
Diagnostic tool
communication
indicator
It lights up when X-431 HD module is
communicating with the diagnostic tool.
Vehicle
communication
indicator
It lights up when X-431 HD module is
communicating with vehicle’s DLC.
Serial port
communication
It illuminates when X-431 HD module is
connected to PC via serial port cable.