26
*
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 Trouble Code
It allows clearing current and historical trouble codes memory in ECU, under
the premise that all the troubles are eliminated.
Figure 4-10 Sample of Clear DTC
The trouble codes can
’
t be erased without eliminating all the troubles, which
will cause the diagnostic tool to always read the trouble code because the
code will always be saved in ECU. Suggestion: users should better not clear
trouble codes, we need to record the trouble details after reading the code,
which is provided as a reference for maintenance. After dealing with troubles,
there will be no trouble code when we re-read.
◼
Read Live Data
