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XTOOL EZ300 PRO With 5 
Systems Diagnosis Engine,ABS,SRS,Transmission and TPMS Tablet Diagnosis 
Tool
Free Update Online for 
2 Year.
XTOOL EZ300 Pro 
Function:
1.Different vehicles 
have slight different 
menus.
2.Common main function 
menu includes the following 
options:
Read 
ECU: this function is to 
read ECU version information, which is the equivalent of “System Identification” 
or “System Information” in some electronic control systems, all mean to read ECU 
related software and hardware versions, models and production date of diesel 
engine, part number, etc. It is convenient for us to make record in the 
maintenance process, and it also makes later date feedback and management 
easier.
Read 
DTCs: read trouble codes 
stored in ECU.
Clear 
DTCs: clear current and 
historical trouble codes memory in ECU, under the premise that all the troubles 
are eliminated. The trouble codes can not be erased without eliminating all the 
troubles, which will cause the diagnostic tool always reading the trouble code 
because the code will always be saved in 
ECU. 
Suggestion: users should better not 
to clear trouble codes, we need record the trouble details after reading code, 
which is provided as reference for maintenance. After dealing with troubles, 
there will be no trouble code when we 
re-read.
Read Live 
Data: that is to read the 
parameters of running engine, such as oil pressure, temperature, engine speed, 
fuel oil temperature, coolant temperature, intake air temperature, etc. Based on 
these parameters, we can judge directly where the problem lies, which helps to 
narrow the scope in maintenance. For some vehicles, during their actual 
operation, the problems such as performance characteristics offset, sensitivity 
reduction, can be judged in live data. This function needs us very familiar with 
 engine parameters, for instance, when idle speed is 800RPM or 750RPM, coolant 
operating temperature is between 80~105℃, what are the operating voltage and 
time of each sensor and 
actuator?
Special 
Functions: depends on vehicle 
models.
Actuation/Ative/ 
Components Test: mainly to judge whether 
these actuating components of engine are working 
properly.
Menu Options:
1.After EZ300PRO tablet 
connected to vehicle via main cable, diagnosis can be performed now. The 
diagnostic interface comes up as 
below.

2. Users can choose 
menu based on their actual needs: selection for Europe means entering European 
cars menu, selection for Asia means entering Asian cars menu, selection for 
America means entering American cars menu, selection for China means entering 
Chinese cars menu. Users also can input vehicle model to 
search.
Test 
Functions:
Take Volkswagen car for 
example, select Diagnosis, then select Europe Car, users can see Volkswagen’s 
logo. If the logo has not been seen,
please swipe up and 
down or enter the car model to research.

Different vehicles have 
slight different menus.
Common main function 
menu includes the following options: 
Read 
ECU:
this function is to 
read ECU version information, which is the equivalent of “System Identification” 
or “System Information” in some electronic
control systems, all 
mean to read ECU related software and hardware versions, models and production 
date of diesel engine, part number,
etc. It is convenient 
for us to make record in the maintenance process, and it also makes later date 
feedback and management easier.

Read 
DTCs: 
read trouble codes 
stored in ECU.
Select Read Trouble 
Codes to read trouble codes stored in ECU. Screen will show the trouble code and 
its definition when read the
trouble codes,shown as 
below.

Tip: In the process of 
diagnosis, if the device shows “System is OK” or “No Trouble Code”, it means 
there is no related trouble code
stored in ECU or some 
troubles are not under the control of ECU, most of these troubles are mechanical 
system troubles or executive
circuit troubles, it is 
also possible that signal of the sensor may bias within limits, which can be 
judged in Live Data.
Clear 
DTCs: 
Return to the previous 
step, select Clear DTCs to clear current and historical trouble codes memory in 
ECU. Performing this function will
clear all thecurrent 
and historical trouble codes. Make sure whether the trouble codes have been 
recorded before clearing, shown as below.

Click YES to make clear 
confirmation, if the communication is normal, it will show “Trouble Codes 
Successfully Cleared” or “Trouble Codes Cleared”. Generally, users need re-read 
trouble codes after cleaning them to confirm whether the trouble codes have been 
cleared.
Suggestion:
users should better not 
to clear trouble codes, we need record the trouble details after reading code, 
which is provided as reference for 
maintenance.
After dealing with 
troubles, there will be no trouble code when we 
re-read.
Read Live 
Data:
that is to read the 
parameters of running engine, such as oil pressure, temperature, engine speed, 
fuel oil temperature, coolant temperature,
intake air temperature, 
etc. Based on these parameters, we can judge directly where the problem lies, 
which helps to narrow the scope
in maintenance. For 
some vehicles, during their actual operation, the problems such as performance 
characteristics offset, sensitivity 
reduction,
can be judged in live 
data. This function needs us very familiar with  engine parameters, for 
instance, when idle speed is 800RPM or 
750RPM,
coolant operating 
temperature is between 80~105℃, what are the operating voltage and time of each 
sensor and actuator?

Special 
Functions: 
More special function 
will be found in different vehicle models.

Actuation/Ative/ 
Components Test:
mainly to judge whether 
these actuating components of engine are working 
properly.
Select enter 
Settings
 users can set the 
language, unit and other system related 
options:
Languages: select the 
language. Please tick the needed option from multi-language options on the 
right.

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