No communication is the most common cause of error in the
use of any truck or car diagnostic tool. The LAUNCH X-431 Diagnosis Aid is a car diagnostic tool which
connects to a vehicle’s OBD2 connector and let you easily diagnose electrical
faults and errors.
LAUNCH X-431 Diagnosis Aid checks the electricity and shows
the monitored diagnostic connector data lines, in order to search for voltage
pulses. The colored LED lights indicate when the signals being pulled too
high/low. This diagnostic device has unlimited connecting scope, so an error
can be located within a few minutes.
The battery voltage is monitored continuously. Therefore, the
display will show the voltage as soon as it is too low and a warning sound will
be emitted. In addition the charging state of the alternator can be checked.
The box is powered via the diagnostic connector.
Car diagnostic tool - LAUNCH X-431 Diagnosis Aid user’s manual